Non-magnetic wear-resisting spraying powder for oil aluminum alloy drill pipe

The invention discloses an iron-based wear-resistant spraying powder for a non-magnetic light structure, which can be used for a wear-resisting corrosion-resisting coating of a future oil aluminium alloy drill pipe. An iron-base powder alloy comprises boron, chromium, carbon, nickel, manganese, silicon and iron. The iron-based wear-resistant spraying powder is characterized in that 1) the non-magnetic wear-resisting spraying powder is from a micro-magnetic state to a non-magnetic state, the spraying powder takes an austenitic matrix as materials, and the austenitic matrix has non-magnetic properties, and is conveniently used together in measurement while drilling for a downhole, 2) the spraying powder has good manufacturability and excellent bonding performances with an aluminum alloy matrix, requires no pretreatment on the matrix while spraying, and protects the environment, the coefficient of thermal expansion is matched better with aluminum alloys, and the spraying powder further has ...

Communication method capable of accelerating internet small computer interface data and system for processing internet small computer interface data

The invention discloses a communication method capable of accelerating internet small computer interface data and a system for processing the internet small computer interface data, which are applied to a target terminal of an internet small computer interface to send a plurality data packets to a plurality of sets of storage equipment. The communication method comprises the following steps that: the target terminal receives an access request for accessing the storage equipment and generates a plurality of small computer interface commands according to the access request; and a data transmitting unit (egress packet generator) in the target terminal reads the small computer interface commands, runs an address resolution program to convert the small computer interface commands to a plurality of network packets, generates a first check code according to the storage content of each network packet and loads the check code into the network packet.

Method for preparing halogenated biphenyl

The present invention relates to a method for synthesizing halogenated biphenyl, wherein one halogenated aniline of 4-bromium-2-fluoroaniline or 2, 4-difluoro aniline or 2-fluoroaniline or 4-fluoroaniline or the like, and the benzene are used as the principal raw material under a acidic condition, the trichloroacetic acid, the anhydrous magnesium sulphate and homemade composite catalyst containing copper or zinc or iron are added into a same reactor, and a diazotization reaction and a coupling reaction are completed synchronously. The invention also discloses a method for preparing a homemade composite catalyst containing a metal, including the steps: adding the dimethylformamide into a reactor, filling the nitrogen to protect, adding 0.1-1.0 equivalent weight ammonium formate, 0.5-1.0 equivalent weight N, N, N', N'-tetraphenyl ethylene diamine and 0.1-0.3 equivalent weight CuCl2 or ZnCl2 or FeCl3 and 0.01-0.03 equivalent weight PdCl2, then mixing and heating until 30-60 DEG C, agitating ...

Block chain parallel contract security check method, system and device

The invention discloses a block chain parallel contract security check method, system and device, and the method comprises the steps: analyzing a contract source code into a token stream, and recognizing a target parallel contract according to the token stream; whether a registered first contract function exists in the target parallel contract or not is judged according to the token stream, and when the registered first contract function does not exist, first abnormity prompting is carried out; if yes, judging whether the first contract function is consistent with a logout second contract function or not; if not, second abnormity prompting is carried out; if yes, whether the read-write state of the first contract function on the storage variable can be parallel or not is judged, and if the first contract function has write-in operation on the storage variable and the type of the storage variable does not support concurrent access, a third exception prompt is given; otherwise, calculating ...

Iron-based spray welding powder for buildup welding

The invention discloses an iron-based spray welding powder for buildup welding. The iron-based spray welding powder is composed of, by weight, 25-32% of chromium, 2-5% of molybdenum, 1.3-3% of boron, 0.5-5% of manganese, 11-16% of nickel, 0.1-0.3% of nitrogen, 0.5-3% of titanium, not larger than 4% of aluminum, 0.04-4% of silicone, smaller than 0.1% of carbon and the rest iron. The iron-based spray welding powder can replace stellite-6 cobalt-based alloy powder to be used in a plasma buildup welding process to protect and repair of an engine air valve, and cost is greatly lowered while high-temperature performance is guaranteed. In addition, the iron-based spray welding powder has high process performance, and preheating treatment needs to be performed on a substrate before stellite 1-6 alloy powder buildup welding to avoid cracking of a welding seam. A substrate for buildup welding through the iron-based spray welding powder does not need to be subjected to preheating treatment, so that ...

Chromium carbide nickel-chromium hard alloy and parts thereof

The invention relates to a chromium carbide nickel-chromium hard alloy. Based on the total amount of the chromium carbide nickel-chromium hard alloy, the chromium carbide nickel-chromium hard alloy contains more than or equal to 50 percent and less than 100 percent of chromium carbide as a hard phase, and more than 0 percent and less than or equal to 50 percent of nickel-chromium alloy as a binder phase. The relative density of the chromium carbide nickel-chromium hard alloy is over 85 percent. The invention also provides parts of the chromium carbide nickel-chromium hard alloy. The chromium carbide nickel-chromium hard alloy of the invention has high relative density and low poriness, has good oxidation resistance, and is suitable to be used under the working condition of the high temperature of over 800 DEG C.

Method for accessing remote logic equipment through multiple routes in Linux system

The invention relates to a method for accessing a remote logical unit in a Linux system in a multipath manner. The method is used for realizing multipath access between an initiator and a target in a storage area network (SAN), and comprises the following steps: the initiator establishes on-line communication with the target and requests to establish at least one on-line session with the target; the initiator obtains internet small computer system interface (iSCSI) on-line host allocated by the target and acquires on-line equipment information corresponding to the iSCSI on-line host by returning a logical unit number (LUN) command; and the initiator which is equipped with an equipment mapping instrument generates redundant equipment information according to the on-line equipment and the corresponding LUN, and maps the redundant on-line equipment to be singular mapping equipment.

Hard alloy product and spray powder

The invention relates to a hard alloy product with cast tungsten carbide as well as spray powder. The hard alloy product comprises not less than 50 percent or less than 100 percent by weight of cast tungsten carbide and more than 0 percent and not more than 50 percent by weight of binding metal. As the cast tungsten carbide has higher strength and excellent wear-resisting performance, the hard alloy and the spray powder have higher hardness and wear-resisting performance.

Operation platform for Christmas tree of water injection well

The invention discloses a Christmas tree operating platform for a water injection well. The Christmas tree operating platform is of a steel structure composed of a bearing structure, a Christmas tree connecting structure and two supporting structures. The bearing structure comprises a main body composed of platform reinforcing ribs and a bearing platform and an anti-skid net covering the upper surface of the main body. The Christmas tree connecting mechanism comprises an upper sleeve, an upper connecting plate, a fastening screw rod, a hinge, a connecting seat, a lower connecting plate and a lower sleeve; one ends of the upper connecting plate and the lower connecting plate are fixed on the outer wall of one side of the bearing table through a connecting seat, and the other ends of the upper connecting plate and the lower connecting plate are respectively connected with the sleeve walls of the upper sleeve and the lower sleeve which are coaxially arranged; the fastening screw rod is mounted ...

Method and device for allocating distributed type storage magnetic discs

The invention discloses a method and a device for allocating distributed type storage magnetic discs. The method comprises the following steps of according to the number of unallocated magnetic discs, sequencing storage nodes of a cluster, so as to obtain a first sequencing result; according to the first sequencing result, sequentially selecting one unallocated magnetic disc from each storage node, recording the number of the storage nodes containing the unallocated magnetic disc as the magnetic disc redundancy allowable value when the unallocated magnetic disc is selected, and repeating the steps until all unallocated magnetic discs of the cluster form an unallocated magnetic disc sequence; according to the preset redundancy, finding the magnetic disc of which the magnetic disc redundancy in the unallocated magnetic disc sequence meets the requirement, and sequentially selecting the magnetic discs to form a storage pool. The method has the advantages that the same group of magnetic discs ...

System and method for capturing and recovering moisture in tail flue gas of cement kiln prepared from carbide slag

The invention discloses a system and a method for capturing and recovering moisture in tail flue gas of a cement kiln made of carbide slag. A multi-tube cooler, a condensing tower and a gas-water separator are sequentially arranged between a dust collection device and an exhaust fan of a production workshop; the flue gas moisture trapping and recycling system further comprises a waste heat boiler softened water pipeline and a water storage tank, high-moisture flue gas at the tail of the cement kiln is converted into low-moisture flue gas after being treated by the dust collecting device, the multi-pipe cooler, the condensing tower and the gas-water separator in sequence, and the low-moisture flue gas is exhausted through the exhaust fan and the chimney. Liquid water recovered from the bottom of the condensing tower and the bottom of the gas-water separator is introduced into the water storage tank. By adopting the system and the method for capturing and recycling the moisture in the tail ...

Hard alloy product and spray powder

The invention relates to a hard alloy product with cast tungsten carbide as well as spray powder. The hard alloy product comprises not less than 50 percent or less than 100 percent by weight of cast tungsten carbide and more than 0 percent and not more than 50 percent by weight of binding metal. As the cast tungsten carbide has higher strength and excellent wear-resisting performance, the hard alloy and the spray powder have higher hardness and wear-resisting performance.

Spray coating powder with excellent toughness

The invention relates to thermal spray coating powder with excellent toughness. The thermal spray coating powder is prepared from the following raw materials in percentage by weight: 0-93% of cast tungsten carbide, 3-96% of monocrystalline tungsten carbide, 4-30% of bonding metal and the balance of ordinary tungsten carbide. The thermal spray coating powder has the excellent effects that the cast tungsten carbide has high hardness, so that the spray coating powder provided by the invention has high hardness; the monocrystalline tungsten carbide is a single crystal, so that the spray coating powder has good toughness; and by matching the two raw materials of the cast tungsten carbide and the monocrystalline tungsten carbide, the hardness of the spray coating powder is enhanced, and simultaneously, the toughness is also increased greatly.

Method for identifying and dynamically updating storage device state of target terminal

The invention relates to a method for identifying the state of storage devices at a target terminal. The method is used in a storage local area network established in a Linux system and for judging the use state of the storage devices at the target terminal through the identification number of a logic device. The method comprises the following steps: an initiating terminal establishes dialogue online for the target terminal and acquires a plurality of storage devices distributed and a plurality of corresponding logical unit numbers; the initiating terminal writes an instruction for returning the logical unit numbers into a command description block and encapsulates the command description block into an SCSI instruction request packet to be transmitted to the target terminal; the feedback SCSI instruction request packet is received and a logical unit number carried by the SCSI instruction response packet are judged; the initiating terminal compares the logical unit numbers distributed and ...

Tungsten carbide welding rod and welding wire

The invention provides a tungsten carbide welding rod and a tungsten carbide welding wire, which comprise a strip-shaped or filate tubular sheath and filler which is filled in the tubular sheath and comprises tungsten carbide powder. The tubular sheath contains over 50 percent of copper element; a welding temperature of the copper tungsten carbide welding rod or the welding wire is lower, so that the tungsten carbide is effectively prevented from being decomposed while overlaying, and wear-resisting property of the tungsten carbide is kept; the tubular sheath contains the copper, and the tungsten carbide is easy to wet, so that the bonding strength of the tungsten carbide and an overlaid base metal is effectively improved, the possibility that the tungsten carbide is fallen off is reduced when an overlaying part is under a using condition, and a wear-resistant part is prevented from becoming invalid; and the tungsten carbide welding rod and the tungsten carbide welding wire are widely applied ...

Method for accessing remote logic equipment through multiple routes in Linux system

The invention relates to a method for accessing a remote logical unit in a Linux system in a multipath manner. The method is used for realizing multipath access between an initiator and a target in a storage area network (SAN), and comprises the following steps: the initiator establishes on-line communication with the target and requests to establish at least one on-line session with the target; the initiator obtains internet small computer system interface (iSCSI) on-line host allocated by the target and acquires on-line equipment information corresponding to the iSCSI on-line host by returning a logical unit number (LUN) command; and the initiator which is equipped with an equipment mapping instrument generates redundant equipment information according to the on-line equipment and the corresponding LUN, and maps the redundant on-line equipment to be singular mapping equipment.

Laminated plastics-metal band and manufacturing method thereof

Method for identifying and dynamically updating storage device state of target terminal

The invention relates to a method for identifying the state of storage devices at a target terminal. The method is used in a storage local area network established in a Linux system and for judging the use state of the storage devices at the target terminal through the identification number of a logic device. The method comprises the following steps: an initiating terminal establishes dialogue online for the target terminal and acquires a plurality of storage devices distributed and a plurality of corresponding logical unit numbers; the initiating terminal writes an instruction for returning the logical unit numbers into a command description block and encapsulates the command description block into an SCSI instruction request packet to be transmitted to the target terminal; the feedback SCSI instruction request packet is received and a logical unit number carried by the SCSI instruction response packet are judged; the initiating terminal compares the logical unit numbers distributed and ...

Method for preparing cement clinker from high-proportion carbide slag through decomposition outside kiln of five-stage preheater

The invention relates to a method for preparing cement clinker from high-proportion carbide slag through decomposition outside a kiln of a five-stage preheater. The method is finished by the steps of drying carbide slag, grinding raw materials, and sintering clinker. The step of the drying carbide slag simultaneously comprises the substeps of drying and removing impurities; the step of grinding the raw materials comprises the substeps of grinding, and discharging waste gas; and the step of sintering the clinker comprises the substeps of preheating outside the kiln, decomposing outside the kiln, calcining, and storing the clinker. By implementing the method, the problems of waste residue treatment in the conventional domestic industry for preparing industrial chemicals by an acetylene method are solved, the waste residues such as carbide slag, crushed limestone, limemud and the like can be utilized to the maximum extent, and the problems of environmental pollution caused by waste residue ...

Jointed hollow arc gouging rod

A jointable hollow carbon rod used for arc gouging includes one or more hollow carbon rods joined together end-to-end. Because of the hollow nature of the rods, more electrical current can be delivered to the rods, resulting in significantly faster material removal. Since the rods are jointable, the arc gouging process can continue for a longer period of time before the jointed rods are consumed by the arc gouging process.

Method for regulating and controlling self-assembly of ferritin in cells through bis/polycistron expression system

The invention provides a method for regulating and controlling self-assembly of ferritin in cells through a bicistronic/polycistronic expression system, and ferritin subunit monomers containing different components are self-assembled in prokaryotes through the bicistronic expression system or the polycistronic expression system to obtain controllably-assembled fusion expression ferritin. The fusion ferritin subunit and the wild type ferritin subunit are simultaneously expressed in one cell by utilizing a polycistron/cistron expression system, so that the influence of large-size protein which is externally added is reduced, the threshold effect of ferritin fusion expression is overcome, and the protein which is difficult to fuse and express under the normal condition is improved. The fusion-expressed ferritin cage-shaped particles can be successfully assembled together with ferritin subunits, and the proportion of ferritin subunit monomers with different components in the ferritin cage-shaped ...

Data analyzing method for iSCSI (internet small computer system interface) packet

The invention discloses a data analyzing method for iSCSI (internet small computer system interface)packet, which is used for accelerating to analyze an asynchronous information packet transmitted by the iSCSI packet. The data analyzing method comprises the following steps: establishing communication between a launching terminal and a target terminal; sending the asynchronous information packet to the launching terminal; analyzing a launching terminal task label from the asynchronous information packet by a section recombining engine at the launching terminal; extracting the host machine buffer address information of the launching terminal from the launching terminal task label; and sending out a direct access internal memory order, and directly writing the load content of the iSCSI packet into an internal memory address of the corresponding host machine buffer address information.

Communication method capable of accelerating internet small computer interface data and system for processing internet small computer interface data

The invention discloses a communication method capable of accelerating internet small computer interface data and a system for processing the internet small computer interface data, which are applied to a target terminal of an internet small computer interface to send a plurality data packet to a plurality of sets of storage equipment. The communication method comprises the following steps that: the target terminal receives an access request for accessing the storage equipment and generates a plurality of small computer interface commands according to the access request; and a data transmitting unit (egress packet generator) in the target terminal reads the small computer interface commands, runs an address resolution program to convert the small computer interface commands to a plurality of network packets, generates a first check code according to the storage content of each network packet and loads the check code into the network packet.

Special vertical star wheel reducer for ladle turret

The invention relates to a special vertical star wheel reducer for a ladle turret. An input shaft is horizontally arranged at the lower portion of a machine shell, a middle shaft is vertically arranged in the machine shell, the input shaft and the middle shaft are reversely driven through a one-level spiral bevel gear pair, an output shaft is arranged at the upper portion of the machine shell, the output shaft and the middle shaft are coaxially arranged and are connected and driven through a star wheel unit of more than one level , the star wheel unit comprises an eccentric locking collar, eccentric bearings and planetary gears, the eccentric locking collar is fixedly connected to the middle shaft in a sleeved mode, the two eccentric bearings are arranged on the eccentric locking collar in a sleeved mode, the two eccentric bearings are connected with the planetary gears in a sleeved mode respectively, the planetary gears are meshed and driven with internal gear ring on the inner wall of ...