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本文采用硅进行补充合金化,研制成功了我国第一种新型低合金高速钢 W3Mo2Cr4VSi。文中介绍了该钢的化学成分、物理性能、力学性能、生产工艺和使用效果。该钢经1180～1220℃淬火,540～560℃回火后,力学性能可以达到:回火硬度(HRC)65～66.5;抗弯强度σ_(bb)≥3000～4000N/mm~2;红硬性 T(HRC60)≥620℃,550℃高温硬度(HV)650～710,断裂韧性K_(1c)≥430～450N/mm~(3/2)。使用结果表明,该钢用于切削速度不高的一类工具,其性能达到了通用高速钢的水平,而成本降低约20%。
In this paper, the use of silicon for alloying, the successful development of China’s first new low-alloy high-speed steel W3Mo2Cr4VSi. The article describes the chemical composition of the steel, physical properties, mechanical properties, production processes and the use of results. The steel after quenching at 1180 ~ 1220 ℃, tempering at 540 ~ 560 ℃, the mechanical properties can be achieved: tempering hardness (HRC) 65 ~ 66.5; flexural strength σ_ (bb) ≥ 3000 ~ 4000N / mm ~ 2; T (HRC60) ≥620 ℃, 550 ℃ high temperature hardness (HV) 650 ~ 710, fracture toughness K_ (1c) ≥430 ~ 450N / mm ~ (3/2). The results show that the steel used in cutting tools is not high speed, its performance reached the level of general high-speed steel, and the cost is reduced by about 20%.