Toughening method for casting high-boron wear-resistant alloy

A wear-resistant alloy, high-boron technology, applied in the direction of manufacturing tools, heat treatment equipment, heat treatment process control, etc., can solve the problem of low impact toughness of high-boron wear-resistant alloys, and achieve the effect of improving impact toughness

Active Publication Date: 2006-07-19
NINGBO ZHEDONG PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The purpose of the present invention is to invent a toughening method that can effectively improve the impact toughness of cast high boron wear-resistant alloys against the shortcoming of low impact toughness

Method used

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  • Toughening method for casting high-boron wear-resistant alloy
  • Toughening method for casting high-boron wear-resistant alloy
  • Toughening method for casting high-boron wear-resistant alloy

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Effect test

Embodiment 1

[0029] The chemical composition is 0.31 wt% C, 1.0 wt% B, 0.66 wt% Si, 0.82 wt% Mn. Modified with 2.5wt% FeTi30, the test block was water quenched at 1020 ° C for 3 hours, and then tempered at 200 ° C for 2 hours, the eutectic boride was broken, and it was isolated and granular. Wire cut 10mm×10mm×55mm standard specimen impact energy A k It is 8.5J and the hardness is 51HRC.

Embodiment 2

[0031] The chemical composition is 0.32wt% C, 1.0wt% B, 0.80wt% Si, 0.85wt% Mn. Modified with 3.2wt% FeTi30, the test block was water quenched at 1020 ° C for 3 hours, and then tempered at 200 ° C for 2 hours, the eutectic borides were broken, and they were isolated and granular. Wire cut 10mm×10mm×55mm standard specimen impact energy A k It is 8J and the hardness is 52HRC.

Embodiment 3

[0033] The chemical composition is 0.32wt% C, 1.0wt% B, 0.80wt% Si, 0.85wt% Mn. Modified with 3.2wt% FeTi30, the test block was water quenched at 1040 ° C for 3 hours, and then tempered at 200 ° C for 2 hours, the eutectic boride was completely broken, and it was isolated and granular. Wire cut 10mm×10mm×55mm standard specimen impact energy A k It is 10J and the hardness is 51.5HRC.

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Abstract

The toughening method for cast high-B wear-resist alloy comprises: after melting the liquid steel and deoxidized by Aluminum, adding 2.5-3.3w% FeTi30 as alterant; then, casting after melting clear and skimming slag; holding the toughening temperature 1020-1050Deg for 2-3h; finally, quenching temper or normalizing. The alloy has absorption power Ak up to 12.5J on 10mmí‡ 10mmí‡ 55mm standard sample.

Description

technical field [0001] The invention relates to the field of high boron alloy materials, in particular to a toughening method for casting high boron wear-resistant alloys. Background technique [0002] As we all know, hardness and toughness are two main factors affecting the wear resistance of materials. Under the condition of ensuring hardness, the higher the toughness of the material, the better the wear resistance. Under the condition of high impact and wear, in addition to bearing wear, the workpiece must also bear the impact of large energy without fracture failure. Therefore, improving the toughness can not only improve the wear resistance and service life of the material, but also improve the reliability of the material . In addition, increased toughness can expand the range of applications for some materials. [0003] High-boron cast wear-resistant alloys have gradually attracted people's attention because of their low manufacturing cost and some excellent properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C21D1/00C21D11/00C22C1/02C21C7/06C22C37/10
Inventor 刘仲礼胡开华
Owner NINGBO ZHEDONG PRECISION CASTING
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