Heat-treated vanadium-containing high-boron high-speed steel and heat treatment method thereof

A heat treatment method and high-speed steel technology, applied to heat-treated vanadium-containing high-boron high-speed steel and its heat treatment field, can solve the problems of reduced strength and toughness, coarse boron carbides, grain boundary embrittlement, etc. Good abrasiveness, stress relief effect

Active Publication Date: 2022-01-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solubility of boron in high-speed steel is very small, and most boron is precipitated in high-speed steel as boron carbides with high hardness and good stability. Reduced toughness

Method used

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  • Heat-treated vanadium-containing high-boron high-speed steel and heat treatment method thereof
  • Heat-treated vanadium-containing high-boron high-speed steel and heat treatment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A heat treatment method for vanadium-containing high-boron high-speed steel, comprising the following steps:

[0053] S1. Use vanadium-containing high-boron high-speed steel as the workpiece to be quenched. The composition of V-containing high-boron high-speed steel includes C: 0.37%, B: 1.44%, Cr: 4.77%, Si: 0.58%, and Mn: 0.61%, W: 1.16%, Mo: 0.63%, Ti: 0.07%, Al: 0.58%, V: 1.00%, the rest is Fe and unavoidable trace impurities;

[0054] S2. Raise the quenched workpiece in step S1 to 1010° C., keep it warm for 110 minutes, and then carry out oil cooling at room temperature to complete the quenching treatment to obtain the quenched workpiece;

[0055] S3. Perform two tempering treatments on the quenched parts in step S2. The first tempering process is to raise from room temperature to 510 ° C, the heating time is 100 minutes, and air cool to room temperature after 1.5 hours of heat preservation; the second tempering process is from room temperature Raise to 450°C, the...

Embodiment 2

[0058] A heat treatment method for vanadium-containing high-boron high-speed steel, comprising the following steps:

[0059] S1. Use vanadium-containing high-boron high-speed steel as the workpiece to be quenched. The composition of V-containing high-boron high-speed steel includes C: 0.40%, B: 1.50%, Cr: 4.80%, Si: 0.63%, Mn: 0.68%, W: 1.20%, Mo: 0.65%, Ti: 0.09%, Al: 0.60%, V: 2.05%, the rest is Fe and unavoidable trace impurities;

[0060] S2. Elevate the quenched workpiece in step S1 to 1050°C, heat it for 120 minutes, and then perform oil cooling at room temperature to complete the quenching treatment to obtain the quenched workpiece;

[0061] S3. Perform two tempering treatments on the quenched parts in step S2. The first tempering process is to raise the temperature from room temperature to 525 ° C, the heating time is 120 minutes, and air cool to room temperature after 2 hours of heat preservation; The temperature is as high as 475°C, the heating time is 120min, and t...

Embodiment 3

[0063] A heat treatment method for vanadium-containing high-boron high-speed steel, comprising the following steps:

[0064] S1. Use vanadium-containing high-boron high-speed steel as the workpiece to be quenched. The composition of V-containing high-boron high-speed steel includes C: 0.44%, B: 1.61%, Cr: 4.83%, Si: 0.68%, and Mn: 0.80%, W: 1.24%, Mo: 0.67%, Ti: 0.12%, Al: 0.63%, V: 3.00%, the rest is Fe and unavoidable trace impurities;

[0065] S2. Elevate the quenched workpiece in step S1 to 1060° C., keep it warm for 150 minutes, and then perform oil cooling at room temperature to complete the quenching treatment to obtain the quenched workpiece;

[0066] S3. Perform two tempering treatments on the quenched parts in step S2. The first tempering process is from room temperature to 550 ° C, the heating time is 130 minutes, and air cooling to room temperature after 2.5 hours of heat preservation; the second tempering process is from room temperature Raise to 490°C, the heati...

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Abstract

The invention discloses a heat-treated vanadium-containing high-boron high-speed steel and a heat treatment method thereof. According to the heat treatment method, quenching treatment is conducted on the vanadium-containing high-boron high-speed steel at the temperature of 1010-1060 DEG C to obtain a quenched part; and the quenched part is subjected to tempering treatment twice, and after the part is subjected to air cooling to the room temperature, the heat-treated vanadium-containing high-boron high-speed steel is obtained. According to the vanadium-containing high-boron high-speed steel and the preparation method thereof, the form of boron carbide is improved through vanadium addition and a heat treatment process, matrix strengthening is promoted, the vanadium-containing high-boron high-speed steel with excellent strength and toughness is obtained, and the vanadium-containing high-boron high-speed steel subjected to heat treatment can be better adapted to severe working conditions when being applied to actual production.

Description

technical field [0001] The invention belongs to the technical field of alloy heat treatment, and in particular relates to a heat-treated vanadium-containing high-boron high-speed steel and a heat treatment method thereof. Background technique [0002] High-speed steel is a wear-resistant and heat-resistant tool steel with secondary hardening properties, suitable for high-speed cutting. High-speed steel contains a large number of strong carbide-forming elements, and has the characteristics of high hardness, excellent wear resistance and heat resistance. High-boron high-speed steel is a new type of high-speed steel formed by adding an appropriate amount of boron on the basis of ordinary high-speed steel and reducing the content of alloy elements such as Mo and W in high-speed steel. High-boron high-speed steel has high hardness and is an ideal roll material. It can stabilize the boride type in the structure of high-boron high-speed steel and reduce the content of alloy elemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/32C22C38/02C22C38/04C22C38/06C22C38/22C22C38/28C22C38/24C21D1/18
CPCC22C38/32C22C38/02C22C38/04C22C38/06C22C38/22C22C38/28C22C38/24C21D1/18
Inventor 马胜强郭鹏佳邢建东吕萍付沙沙
Owner XI AN JIAOTONG UNIV
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