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

Inactive Publication Date: 2014-05-21
WUXI XINSANZHOU STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because this high-speed steel contains a large amount of Mo and V, the production cost is even higher than that of W6Mo5Cr4V2 high-speed steel, and its versatility is not strong

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention discloses a heat treatment process of high speed steel for a cutting tool. The heat treatment process comprises the following steps: (1) heating in stages, to be more specific, in the first stage, heating to the temperature of 550-560 DEG C with the holding time of 20-30 minutes; in the second stage, heating to the temperature of 820-840 DEG C with the holding time of 30-40 minutes, in the third stage, heating to quenching temperature of 1070-1090 DEG C with the holding time of 60-90 minutes; (2) quenching by oil cooling; (3) tempering with the tempering temperature of 505-515 DEG C with the holding time of 90-120 minutes, then cooling by air to room temperature; and performing the tempering treatment for two times by the process.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a heat treatment process for high-speed steel for cutting tools. Background technique [0002] Cutting tool high-speed steel materials are generally made of domestic high-speed steel W6Mo5Cr4V2. The chemical composition of the alloy is (weight%): C0.80%~0.90%, Si≤0.45%, Mn≤0.40%, W5.50%~6.75%, Mo4 .50%~5.50%, Cr3.80%~4.40%, V1.75%~2.20%, S≤0.03%, P≤0.03%, and the rest is Fe. The high-speed steel contains a relatively high content of Mo. Due to the lack of Mo in the international market, the price is relatively expensive, and the content of tungsten and vanadium in the high-speed steel is also high, so the cost of producing the alloy is also greatly increased. [0003] Chinese invention patent (notification number is CN1014081) discloses low-alloy high-performance high-speed steel, which is characterized in that the specific chemical composition of the steel is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54C21D1/18
Inventor 林永峰
Owner WUXI XINSANZHOU STEEL
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