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Chromium steel series high speed steel and heat treatment technique thereof

A technology of high-speed steel and chromium steel, which is applied in the field of chromium steel high-speed steel and its heat treatment process, can solve the problems of poor versatility and high production cost, and achieve the goals of improving process performance, guaranteeing various performances, high plasticity and toughness Effect

Inactive Publication Date: 2009-07-08
周向儒
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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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  • Chromium steel series high speed steel and heat treatment technique thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A chromium steel high-speed steel, the high-speed steel includes: carbon C0.95%, silicon Si0.3%, manganese Mn0.3%, chromium Cr10%, tungsten W3.0%, molybdenum Mo1.0% by weight percentage , Vanadium V1.0%, Nickel Ni0.2%, Cobalt Co0.3%, Niobium Nb1.2%, Titanium Ti0.3%, Rare Earth Elements 0.05%, Sulfur S≤0.015%, Phosphorus P≤0.02%, the balance For iron Fe.

[0038] The heat treatment process for the above-mentioned chromium steel high-speed steel includes the following steps:

[0039] (1), the first preheating, the temperature is 600 ℃, and the preheating time is 60 minutes;

[0040] (2), the second preheating, the temperature is 900 ℃, and the preheating time is 45 minutes;

[0041] (3) Quenching heating, the quenching heating temperature is 1100°C-1140°C, the quenching time is: (25+material thickness / 2) minutes, and then oil-cooled to 200°C-250°C;

[0042] (4) For the first tempering, the tempering temperature is 520°C to 540°C, the tempering time is 120 minutes, and th...

Embodiment 2

[0046] A chromium steel high-speed steel, the high-speed steel includes: carbon C0.9%, silicon Si0.2%, manganese Mn0.2%, chromium Cr9.5%, tungsten W2.5%, molybdenum Mo0. 6%, Vanadium V0.4%, Nickel Ni0.1%, Cobalt Co0.2%, Niobium Nb0.8%, Titanium Ti0.3%, Rare Earth Elements 0.05%, Sulfur S≤0.015%, Phosphorus P≤0.02%, The balance is iron Fe.

[0047] The heat treatment process for the above-mentioned chromium steel high-speed steel includes the following steps:

[0048] (1), the first preheating, the temperature is 600 ℃, and the preheating time is 60 minutes;

[0049] (2), the second preheating, the temperature is 900 ℃, and the preheating time is 45 minutes;

[0050] (3) Quenching heating, the quenching heating temperature is 1100℃~1140℃, the quenching time is: (25+material thickness / 2) minutes, then cooling in salt bath, grading heat preservation at 600℃, and then salt bath to 200℃~250℃ ;

[0051] (4) For the first tempering, the tempering temperature is 520°C to 540°C, th...

Embodiment 3

[0055] A chromium steel high-speed steel, the high-speed steel includes: carbon C1.0%, silicon Si0.4%, manganese Mn0.4%, chromium Cr10.5%, tungsten W3.5%, molybdenum Mo1. 5%, Vanadium V1.0%, Nickel Ni0.3%, Cobalt Co0.5%, Niobium Nb1.2%, Titanium Ti0.3%, Rare Earth Elements 0.05%, Sulfur S≤0.015%, Phosphorus P≤0.02%, The balance is iron Fe.

[0056] The heat treatment process for the above-mentioned chromium steel high-speed steel includes the following steps:

[0057] (1), the first preheating, the temperature is 600 ℃, and the preheating time is 60 minutes;

[0058] (2), the second preheating, the temperature is 900 ℃, and the preheating time is 45 minutes;

[0059] (3) Quenching heating, the quenching heating temperature is 1100°C-1140°C, the quenching time is: (25+material thickness / 2) minutes, and then air-cooled to 200°C-250°C;

[0060] (4) For the first tempering, the tempering temperature is 520°C to 540°C, the tempering time is 120 minutes, and then air-cooled to ro...

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Abstract

The present invention relates to an alloy high-speed steel, in particular to a chromium-steel-based high-speed steel and its heat treatment process. The high-speed steel comprises: 0.85%-1.05% carbon C, 0.2%-0.4% silicon Si, Manganese Mn0.2%~0.4%, Chromium Cr9.0%~11.0%, Tungsten W2.5%~3.5%, Molybdenum Mo0.6%~2.0%, Vanadium V0.4%~2.0%, Nickel Ni0.1% ~0.3%, cobalt Co0.2%~5.0%, niobium Nb0.8~1.2%, sulfur S≤0.015%, phosphorus P≤0.02%, and the rest is iron Fe. The chromium steel high-speed steel of the invention has sufficient toughness and wear resistance, is suitable for making various cold stamping dies, cutting tools and knives, and has low production cost. The invention also discloses the heat treatment process of the high-speed steel.

Description

technical field [0001] The invention relates to an alloy high-speed steel, in particular to a chromium steel-based high-speed steel and a heat treatment process thereof. Background technique [0002] The existing high-speed steel materials used for cold stamping dies, cutting tools and knives 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 spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/52C21D1/18C21D11/00
Inventor 周向儒赵春华廖德秀宋利秋
Owner 周向儒
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