Heat treatment process of high speed steel for cutting tool
A cutting tool and high-speed steel technology, which is applied in the field of iron and steel metallurgy, can solve the problems of high production cost and poor versatility, and achieve the effects of saving usage, good purity and high toughness
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Embodiment 1
[0023] A heat treatment process for high-speed steel for cutting tools. The chemical composition of the high-speed steel consists of the following components in weight percentage: C: 1.2, Si: 0.7, Mn: 1.0, Cr: 8.5, W: 2.0, Mo: 3.4 , V: 2.8, Ni: 0.8, Ti: 0.2, B: 0.007, N: 0.06, S≤0.015, P≤0.015; the balance is iron Fe and unavoidable impurities; the heat treatment process includes the following steps:
[0024] (1) Heating in stages, the first stage heating temperature is 550°C, holding time is 30 minutes; the second stage is heating to 820°C, holding time is 40 minutes, the third stage is heating to quenching temperature 1070°C, holding time is 90 minutes ;
[0025] (2) quenching, using oil cooling;
[0026] (3) Tempering, the tempering temperature is 505°C, the holding time is 120 minutes, and then air-cooled to room temperature; perform two tempering treatments according to this process.
Embodiment 2
[0028] A heat treatment process of high-speed steel for cutting tools, the chemical composition of the high-speed steel consists of the following components in weight percentage: C: 1.4, Si: 0.5, Mn: 1.2, Cr: 7.5, W: 2.2, Mo: 3.2 , V: 3.0, Ni: 0.6, Ti: 0.4, B: 0.005, N: 0.08, S≤0.015, P≤0.015; the balance is iron Fe and unavoidable impurities; the heat treatment process includes the following steps:
[0029] (1) Heating in stages, the first stage heating temperature is 560°C, holding time is 20 minutes; the second stage is heating to 840°C, holding time is 30 minutes, the third stage is heating to quenching temperature 1090°C, holding time is 60 minutes ;
[0030] (2) quenching, using oil cooling;
[0031] (3) Tempering, the tempering temperature is 515°C, the holding time is 90 minutes, and then air-cooled to room temperature; perform two tempering treatments according to this process.
Embodiment 3
[0033] A heat treatment process of high-speed steel for cutting tools, the chemical composition of the high-speed steel consists of the following components in weight percentage: C: 1.3, Si: 0.6, Mn: 1.1, Cr: 8.0, W: 2.1, Mo: 3.3 , V: 2.9, Ni: 0.7, Ti: 0.3, B: 0.006, N: 0.07, S≤0.015, P≤0.015; the balance is iron Fe and unavoidable impurities; the heat treatment process includes the following steps:
[0034] (1) Heating in stages, the first stage heating temperature is 555°C, holding time is 25 minutes; the second stage is heating to 830°C, holding time is 35 minutes, the third stage is heating to quenching temperature 1080°C, holding time is 75 minutes ;
[0035] (2) quenching, using oil cooling;
[0036] (3) Tempering, the tempering temperature is 510°C, the holding time is 105 minutes, and then air-cooled to room temperature; perform two tempering treatments according to this process.
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