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A kind of pre-alloyed powder material and preparation method thereof

A technology of pre-alloyed powder and alloy materials, which is applied in the field of preparation of pre-alloyed powder materials, can solve problems such as large wear, poor high temperature resistance, and easy oxidation, and achieves improved strength and hardness, high oxidation resistance, and alloy diffusion full effect

Inactive Publication Date: 2016-01-20
涂秀琼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding nickel, cobalt, copper, chromium, molybdenum and other substances improves the strength of powder metallurgy materials, but traditional pre-alloyed powders have poor high temperature resistance and are prone to oxidation, and their products wear a lot during use, resulting in unsuitable high-priced products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A pre-alloyed powder material, the steel strip contains the following components according to the mass percentage:

[0023] Carbon 4%;

[0024] Copper 7%;

[0025] Chromium 22%;

[0026] Molybdenum 18%;

[0027] Nickel 49%.

[0028] Pre-alloyed powder hydrogen loss HL<0.12%.

[0029] A preparation method of pre-alloyed powder material, comprising the following steps:

[0030] a. The powder mixed according to the above ratio is cold-pressed, the pressure is 500MPa, the pressing speed is 120mm / min, the powder is formed at 600MPa and kept for 2min, the cooling speed is increased by lowering the pouring temperature, and the trace element zirconium is added to start the intermediate frequency Power supply, and then the smelting process;

[0031] b. After all the metal powder is melted in the furnace, slagging is performed to remove impurities in the molten metal, and then deoxidation is performed;

[0032] c. The molten metal powder is sintered at a temperature of 100...

Embodiment 2

[0034] A pre-alloyed powder material, the steel strip contains the following components according to the mass percentage:

[0035] Carbon 8%;

[0036] Copper 10%;

[0037] Chromium 25%;

[0038] Molybdenum 19%;

[0039] Nickel 38%.

[0040] Pre-alloyed powder hydrogen loss HL<0.12%.

[0041] A preparation method of pre-alloyed powder material, comprising the following steps:

[0042] a. The powder mixed according to the above ratio is cold-pressed, the pressure is 550MPa, the pressing speed is 135mm / min, the powder is formed at 600MPa and kept for 2.5min, the cooling speed is increased by lowering the pouring temperature, and the trace element zirconium is added to start Intermediate frequency power supply, and then the smelting process;

[0043] b. After all the metal powder is melted in the furnace, slagging is performed to remove impurities in the molten metal, and then deoxidation is performed;

[0044] c. The molten metal powder is sintered at a temperature of 1080...

Embodiment 3

[0046] A pre-alloyed powder material, the steel strip contains the following components according to the mass percentage:

[0047] Carbon 11%;

[0048] Copper 12%;

[0049] Chromium 27%;

[0050] Molybdenum 21%;

[0051] Nickel 19%.

[0052] Pre-alloyed powder hydrogen loss HL<0.12%.

[0053] A preparation method of pre-alloyed powder material, comprising the following steps:

[0054] a. The powder mixed according to the above ratio is cold-pressed, the pressure is 600MPa, and the pressurization speed is 150mm / min. After the powder is molded at 600MPa, it is kept for 3 minutes. The cooling speed is increased by lowering the pouring temperature, adding the trace element zirconium, and starting the intermediate frequency. Power supply, and then the smelting process;

[0055] b. After all the metal powder is melted in the furnace, slagging is performed to remove impurities in the molten metal, and then deoxidation is performed;

[0056] c. The molten metal powder is sinter...

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PUM

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Abstract

The invention discloses a pre-alloyed powder material. A steel strip is composed of, by weight, 4-11% of carbon, 7-12% of copper, 22-27% of chromium, 18-21% of molybdenum and the rest nickel. The invention further discloses a preparation method of the pre-alloyed powder material. Aiming at the problems that traditional pre-alloyed powder materials are poor in high temperature resistance and prone to oxidation and products made of the traditional pre-alloyed powder materials are prone to abrasion, the alloy powder made of metal materials such as chromium, molybdenum, copper and the like is thorough in diffusion and high in oxidation resistance, and alloy intensity and hardness can be effectively improved.

Description

technical field [0001] The invention relates to a pre-alloyed powder material. [0002] The invention also relates to a preparation method of the pre-alloyed powder material. Background technique [0003] The alloy added in the production of pre-alloyed powder is mainly to improve the mechanical properties of the material. Adding nickel, cobalt, copper, chromium, molybdenum and other substances improves the strength of powder metallurgy materials, but traditional pre-alloyed powders have poor high temperature resistance and are prone to oxidation, and their products wear a lot during use, resulting in unsuitable high-priced products. Therefore, it is necessary to provide a new technical solution to solve the above problems. Contents of the invention [0004] To solve the above problems, the present invention provides a pre-alloyed powder material. [0005] The invention also provides a preparation method of the pre-alloyed powder material. [0006] The technical scheme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/08C22C30/02
Inventor 涂秀琼
Owner 涂秀琼
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