Boracic pinion steel and preparation method thereof

The invention relates to boracic pinion steel and a preparation method thereof. The boracic pinion steel comprises the following component by weight percent: 0.16 to 0.24 percent of C, less than or equal to 0.35 percent of Si, 0.70 to 1.25 percent of Mn, less than or equal to 0.030 percent of P, less than or equal to 0.03 percent of S, 0.80 to 1.45 percent of Cr, 0.020 to 0.080 percent of Ti, 0.005 to 0.003 percent of B, 0.015 to 0.05 percent of Al, less than 2.5*10-4 percent of H, 30*10-4 to 120 *10-4 percent of N, and less than or equal to 18 *10-4 percent of T.O, Fe and unavoidable foreign matters. The following process route can be adopted for the production: primary smelting furnace (electric furnace or revolving furnace) - refining furnace (LF furnace and the like) - vacuum refining furnace (VD furnace or RH furnace, etc.) - continuous casting - rolling. Compared with 20CrMnTiH and sub-steel number thereof, the boracic pinion steel has high hardenability, stability and narrow flap ...

Steel for low-carbon wear-resistant engineering machinery creeper tread and manufacturing method thereof

The invention relates to steel for a low-carbon wear-resistant engineering machinery creeper tread and a manufacturing method thereof. The steel comprises the following chemical components in percentage by weight: 0.17-0.27 percent of C, 0.17-0.37 percent of Si, 0.85-1.20 percent of Mn, 0.10-0.30 percent of Cr, 0.010-0.060 percent of Al, 0.010-0.20 percent of Cu, 0.01-0.20 percent of Ni, 0.003-0.025 percent of P, 0.001-0.025 percent of S, 0.020-0.060 percent of Ti, 0.0005-0.0035 percent of B, 5-20*10<-6> percent of [O], 40-90*10<-6> percent of [N] and the balance of Fe and inevitable impurities. The manufacturing method adopts an electric furnace for smelting and making steel, an LF furnace for external refining and VD for vacuum degassing treatment. The steel and the manufacturing methodhave excellent technical effects.

Boracic pinion steel and preparation method thereof

The invention relates to boracic pinion steel and a preparation method thereof. The boracic pinion steel comprises the following component by weight percent: 0.16 to 0.24 percent of C, less than or equal to 0.35 percent of Si, 0.70 to 1.25 percent of Mn, less than or equal to 0.030 percent of P, less than or equal to 0.03 percent of S, 0.80 to 1.45 percent of Cr, 0.020 to 0.080 percent of Ti, 0.005 to 0.003 percent of B, 0.015 to 0.05 percent of Al, less than 2.5*10-4 percent of H, 30*10-4 to 120 *10-4 percent of N, and less than or equal to 18 *10-4 percent of T.O, Fe and unavoidable foreign matters. The following process route can be adopted for the production: primary smelting furnace (electric furnace or revolving furnace) - refining furnace (LF furnace and the like) - vacuum refining furnace (VD furnace or RH furnace, etc.) - continuous casting - rolling. Compared with 20CrMnTiH and sub-steel number thereof, the boracic pinion steel has high hardenability, stability and narrow flap ...

Argon-blowing prefabricated member for continuous casting tundish cover

The invention relates to an argon-blowing prefabricated member for a continuous casting tundish cover and belongs to the technical field of ferrous metallurgical equipment. Argon-blowing prefabricated members with difference sizes can be designed according to the size of a baking hole, a charging hole, a plug hole and the like of the tundish cover. The argon-blowing prefabricated member comprisesa prefabricated member body; the argon-blowing prefabricated member body has a shape of a cone of which the radius of the upper bottom is greater than that of the lower bottom, or the longitudinal section structure of the prefabricated member body is T-shaped. The prefabricated member body is hollow, an aeration pipeline is arranged in the prefabricated member body, and the prefabricated member body is provided with an aeration hole communicated with the aeration pipeline. The argon-blowing prefabricated member solves the problems that the peripheries of the baking hole and the plug hole are deformed ...

Continuous casting tundish for improving cleanliness of molten steel

Steel-making deoxidizer and preparation method thereof

The invention relates to a steel-making deoxidizer and a production method thereof. The steel-making deoxidizer comprises the following components in percentage by weight: 10-40% of Si, 60-30% of SiC, 10-25% of Fe and 5-20% of CaSiO3 and is prepared from a quartz crystal and solar cell processing waste sand by spraying an aqueous Ca(OH)2 solution in granulating process. The invention makes wastesprofitable, realizes recycling, reduces the environmental pollution and can benefit the society.

Flame cutting energy conservation device and operation method thereof

The invention relates to a flame cutting energy conservation device and an operation method thereof. The device is characterized in that a gas line (8) is connected with a safety explosion-release valve (10), the other end of the safety explosion-release valve (10) is connected with a fuel gas delivery device (5) which is connected with an electric contact pressure controller (11), a electronic control ball valve signal wire (12), an electric contact pressure control signal wire (13) and a pulse electronic fire signal wire (18) are respectively with an energy conservation control device (6); the energy conservation control device is centrally controlled by a PLC programmable controller. The operation method comprises the following steps: 1) starting cutting; 2) stopping cutting; 3) stopping operating when pressure of the fuel gas delivery device (5) rises to the preset value and retaining the pressure; 4) cutting once again and transmitting electric signals to the energy conservation control ...

Continuous casting tundish for improving cleanliness of molten steel

The invention discloses a continuous casting tundish for improving cleanliness of molten steel and belongs to the field of ferrous metallurgy technology. The continuous casting tundish comprises a tundish, porous bricks, an overflow groove, a slag blocking wall and a dam. The continuous casting tundish for improving cleanliness of molten steel provided by the invention makes full use of the double effects of argon foam stirring and cleaning, is safe, practical, simple and convenient, can obviously improve the separation effect of impurities and gases in the molten steel and improve the cleanliness of the molten steel and the quality of billet steel and the like.

Converter operation actual performance evaluation method and system, terminal and storage medium

The invention provides a converter operation actual performance evaluation system and method, a terminal and a storage medium, and relates to the technical field of converter steelmaking. A BP neural network is used for extracting target data in the database under the condition similar to that of the furnace; data fitting is carried out on a CO content curve of a carbon-oxygen reaction in the blowing process, a converter bottom blowing flow curve and the like, and various fitting curves and control intervals are obtained; the current heat is executed, the operation actual performance parameters and the corresponding conditions of the furnace entering conditions of the corresponding steel grades in the database are compared and analyzed one by one, evaluation and score assignment are carried out, and scores corresponding to all modules of the converter are obtained; and based on the scores corresponding to all the modules of the converter, the average value of the converter is calculated ...

Flame cutting energy conservation device and operation method thereof

The invention relates to a flame cutting energy conservation device and an operation method thereof. The device is characterized in that a gas line (8) is connected with a safety explosion-release valve (10), the other end of the safety explosion-release valve (10) is connected with a fuel gas delivery device (5) which is connected with an electric contact pressure controller (11), a electronic control ball valve signal wire (12), an electric contact pressure control signal wire (13) and a pulse electronic fire signal wire (18) are respectively with an energy conservation control device (6); the energy conservation control device is centrally controlled by a PLC programmable controller. The operation method comprises the following steps: 1) starting cutting; 2) stopping cutting; 3) stopping operating when pressure of the fuel gas delivery device (5) rises to the preset value and retaining the pressure; 4) cutting once again and transmitting electric signals to the energy conservation control ...

45BM steel for caterpillar track pin roll and manufacturing method thereof

The invention discloses a 45BM steel for a caterpillar track pin roll, comprising the components by weight percent: 0.43-0.47% of C, 0.17-0.35% of Si, 0.60-0.80% of Mn, 0.005-0.025% of P, 0.001-0.020% of S, 0.01-0.20% of Cr, 0.01-0.20% of Ni, 0.01-0.20% of Cu, 0.0005-0.0030% of B, 0.020-0.060% of Ti, 0.01-0.06% of Al and the rest of Fe and unavoidable impurities. A manufacturing method of the 45BM steel comprises: electric furnace smelting, steel tapping, LF external refining and vacuum degassing (VD) treatment. The reduced molten steel is added with aluminium for finally deoxidization, titanium for nitrogen fixation and ferroboron for alloying after the VD treatment; casting blank is poured by continuous casting; the superheat temperature is 20-30 DEG C, the continuous casting speed is 0.9-1.20m/min, the uniform heating temperature of billet steel in a heating furnace is 1180-1220 DEG C, the heating time is 2.5-3h, the initial rolling temperature is 1100-1150 DEG C, and the final rolling ...

Steel-making deoxidizer and preparation method thereof

The invention relates to a steel-making deoxidizer and a production method thereof. The steel-making deoxidizer comprises the following components in percentage by weight: 10-40% of Si, 60-30% of SiC,10-25% of Fe and 5-20% of CaSiO3 and is prepared from a quartz crystal and solar cell processing waste sand by spraying an aqueous Ca(OH)2 solution in granulating process. The invention makes wastesprofitable, realizes recycling, reduces the environmental pollution and can benefit the society.

45BM steel for caterpillar track pin roll and manufacturing method thereof

The invention discloses a 45BM steel for a caterpillar track pin roll, comprising the components by weight percent: 0.43-0.47% of C, 0.17-0.35% of Si, 0.60-0.80% of Mn, 0.005-0.025% of P, 0.001-0.020% of S, 0.01-0.20% of Cr, 0.01-0.20% of Ni, 0.01-0.20% of Cu, 0.0005-0.0030% of B, 0.020-0.060% of Ti, 0.01-0.06% of Al and the rest of Fe and unavoidable impurities. A manufacturing method of the 45BM steel comprises: electric furnace smelting, steel tapping, LF external refining and vacuum degassing (VD) treatment. The reduced molten steel is added with aluminium for finally deoxidization, titanium for nitrogen fixation and ferroboron for alloying after the VD treatment; casting blank is poured by continuous casting; the superheat temperature is 20-30 DEG C, the continuous casting speed is 0.9-1.20m/min, the uniform heating temperature of billet steel in a heating furnace is 1180-1220 DEG C, the heating time is 2.5-3h, the initial rolling temperature is 1100-1150 DEG C, and the final rolling ...