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Применить Всего найдено 2. Отображено 2.
01-08-2023 дата публикации

Low-temperature-resistant high-strength cold drawn pipe and preparation method thereof

Номер: CN116516258A
Автор: LIU XIANCUI, LIU QINGJIAO, WANG JIACONG, WEI JINYU, LIU YANG, CHEN BORU
Принадлежит:

The invention relates to a low-temperature-resistant high-strength cold-drawn pipe and a preparation method thereof, the cold-drawn pipe is formed by processing a low-carbon low-alloy steel hot-rolled pipe blank with excellent welding performance, and specifically comprises C, Si, Mn, P, S, Cr, Ni, Mo, Cu, V, Re, B and Fe; and the hot-rolled pipe blank is sequentially subjected to quenching, high-temperature tempering, surface treatment, cold drawing, stress relief annealing, straightening and fixed-length saw cutting procedures, and the low-temperature-resistant high-strength cold-drawn pipe is obtained. The cold drawn pipe has high obdurability, still has high low-temperature toughness at low temperature, and can remarkably improve the use safety of the oil cylinder in a low-temperature environment; meanwhile, the cold-drawn pipe is controllable in raw material cost, simple in processing and manufacturing process, easy to implement, short in production period, low in cost, high in product ...

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Номер записи: 1
23-06-2023 дата публикации

Manufacturing process for cylinder barrel of large-caliber thick-wall reducing hydraulic cylinder

Номер: CN116275916A
Автор: LIU YANG, LIU QINGJIAO, WANG JIACONG, LIU XIANCUI, WEI JINYU
Принадлежит:

The invention relates to a large-caliber thick-wall variable-diameter hydraulic cylinder barrel manufacturing process, and belongs to the technical field of hydraulic cylinder machining. Comprising the following steps that a customized XG930 seamless steel pipe is adopted as a hydraulic cylinder barrel raw material; the XG930 seamless steel pipe is subjected to upsetting treatment; bad tissues are eliminated through a hardening and tempering process; the quenched and tempered steel pipe is straightened; the straightened steel pipe is subjected to outer circle turning; boring is conducted; and scraping the inner hole. The method has the beneficial effects that compared with an integral forging mode, the local upsetting forming mode is low in energy consumption, low in equipment requirement and low in machining cost. Compared with a large-allowance machining mode, a local upsetting forming mode is adopted, the material utilization rate is high, a stress relief annealing procedure is omitted ...

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Номер записи: 2