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A kind of aluminum-containing high-boron high-speed steel and its preparation method

A high-speed steel and high-boron technology, applied in the field of wear-resistant materials, can solve the problems of reducing material performance, difficulty in material smelting, and easy segregation, etc., and achieve the effects of excellent mechanical properties, excellent high-temperature oxidation resistance, and excellent wear resistance

Active Publication Date: 2018-02-23
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] At present, high-temperature wear-resistant materials, especially aluminum-containing high-boron high-speed steels, generally have high aluminum content, which leads to low-hardness high-temperature ferrite in the quenched structure, and the high aluminum content makes it difficult to smelt the material, and the aluminum density is low and easy to smelt. Segregation occurs, reducing material properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Aluminum-containing high-boron high-speed steel is smelted in a 500-kg medium-frequency induction furnace, with Q235 scrap steel and W6Mo5Cr4V2Al high-speed steel scrap as the main raw materials, and an appropriate amount of ferroboron, carbon ferrochrome, rare earth ferrosilicon and multi-element aluminum-iron alloy are added. The specific preparation process of the present invention Proceed as follows:

[0036] ①. Use Q235 scrap steel with a mass fraction of 47% (the chemical composition mass fraction of Q235 scrap steel is: 0.19% C, 0.48% Mn, 0.24% Si, 0.037% S, 0.031% P, and the balance is Fe), 35.4% W6Mo5Cr4V2Al The chemical composition and mass fraction of high-speed steel scrap (W6Mo5Cr4V2Al high-speed steel scrap are: 1.09% C, 0.28% Mn, 0.026% P, 0.014% S, 0.51% Si, 3.99% Cr, 1.76% V, 6.15% W, 5.02 %Mo, 0.97% Al, the balance is Fe), 2.6% ferroboron (the chemical composition mass fraction of ferroboron is: 19.08% B, 0.29% C, 1.36% Si, 0.38% Al, 0.008% S, 0.047% ...

Embodiment 2

[0040] Aluminum-containing high-boron high-speed steel is smelted in a 500-kg medium-frequency induction furnace, with Q235 scrap steel and W6Mo5Cr4V2Al high-speed steel scrap as the main raw materials, and an appropriate amount of ferroboron, carbon ferrochrome, rare earth ferrosilicon and multi-element aluminum-iron alloy are added. The specific preparation process of the present invention Proceed as follows:

[0041]①. Use Q235 scrap steel with a mass fraction of 46% (the chemical composition mass fraction of Q235 scrap steel is: 0.15% C, 0.38% Mn, 0.29% Si, 0.046% S, 0.044% P, and the balance is Fe), 36.2% W6Mo5Cr4V2Al The chemical composition and mass fraction of high-speed steel scrap (W6Mo5Cr4V2Al high-speed steel scrap are: 1.08% C, 0.39% Mn, 0.018% P, 0.025% S, 0.24% Si, 3.81% Cr, 2.10% V, 5.56% W, 5.47 %Mo, 0.83% Al, the balance is Fe), 2.5% ferroboron (the chemical composition mass fraction of ferroboron is: 20.93% B, 0.21% C, 1.05% Si, 0.18% Al, 0.006% S, 0.071% P...

Embodiment 3

[0045] Aluminum-containing high-boron high-speed steel is smelted in a 1,000-kg medium-frequency induction furnace, with Q235 scrap steel and W6Mo5Cr4V2Al high-speed steel scrap as the main raw materials, and additionally adding an appropriate amount of ferroboron, carbon ferrochrome, rare earth ferrosilicon and multi-element aluminum-iron alloy. The specific preparation process of the present invention Proceed as follows:

[0046] ①. Use Q235 scrap steel with a mass fraction of 48% (the chemical composition mass fraction of Q235 scrap steel is: 0.21% C, 0.64% Mn, 0.18% Si, 0.038% S, 0.034% P, and the balance is Fe), 34% W6Mo5Cr4V2Al The chemical composition and mass fraction of high-speed steel scrap (W6Mo5Cr4V2Al high-speed steel scrap are: 1.19%C, 0.16%Mn, 0.024%P, 0.023%S, 0.55%Si, 4.35%Cr, 1.76%V, 6.74%W, 4.53% %Mo, 1.18% Al, the balance is Fe), 2.8% ferroboron (the chemical composition mass fraction of ferroboron is: 19.02% B, 0.47% C, 1.51% Si, 0.28% Al, 0.004% S, 0.058...

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Abstract

The invention provides aluminum-containing high-boron high-speed steel and a manufacturing method thereof and belongs to the technical field of wear-resistant materials. A medium-frequency induction furnace is used for carrying out smelting, the steel is manufactured with, by mass percentage, 45%-48% of Q235 scrape steel, 34%-37% of W6Mo5Cr4V2Al high-speed scrap steel, 2.5%-2.8% of boron iron, 6.2%-6.5% of carbon chrome iron, 1.8%-2.2% of rare earth silicon iron and 6.6%-7.0% of multi-element aluminum iron alloy, and after smelting, casting and heat treatment are carried out, the steel has excellent mechanical performance and high-temperature wear-resistant performance, has a good using effect under the high-temperature wear working condition, and has remarkable economic and social benefits by means of application and popularization.

Description

technical field [0001] The invention discloses a high-speed steel and a preparation method thereof, in particular to an aluminum-containing high-boron high-speed steel and a preparation method thereof, and belongs to the technical field of wear-resistant materials. Background technique [0002] In the field of high temperature wear, materials such as heat-resistant cast iron, heat-resistant cast steel and high-speed steel are widely used at present, and high-speed steel has high hardness and good wear resistance at high temperature, so it has great development prospects in the field of high-temperature wear resistance. The currently widely used high-speed steel material is M2 (W6Mo5Cr4V2) high-speed steel. Because this material contains more tungsten and molybdenum expensive alloy elements, the production cost is high. In addition, this kind of material usually requires salt bath quenching, which pollutes the environment. It is also easy to corrode the surface of the product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/00
CPCC22C33/006
Inventor 符寒光李荟符定梅雷永平汪长安
Owner BEIJING UNIV OF TECH