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High-hardness high-wear-resistant powder metallurgy high-speed steel

A powder metallurgy and high wear-resistant technology, applied in the field of high-hardness and high-wear-resistant powder metallurgy high-speed steel, can solve the problems of increased cost, powder metallurgy high-speed steel cannot be fully promoted, and powder metallurgy high-speed steel is expensive.

Active Publication Date: 2009-11-25
HEYE SPECIAL STEEL
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Problems solved by technology

[0005] Chinese invention patent ZL98121315.4 (notification number is CN1215091) discloses a high-hardness powder metallurgy high-speed steel part. The basic composition of the steel part includes: 2.4-3.9 carbon, 0.8 or less manganese, 0.8 or less silicon , 3.75-4.75 chromium, 9.0-11.5 tungsten, 4.75-10.75 molybdenum, 4.0-10.0 vanadium, 8.5-16.0 cobalt and optional 2.0-4.0 niobium, adopting this technical scheme, the high-speed steel produced The steel part has high hardness and high wear resistance, but because of the high content of the noble metal element cobalt (8.5-16.0%) in this technical solution, the cost of the steel part is greatly increased. Therefore, the price of the powder metallurgy high-speed steel More expensive, generally about 2 to 5 times that of ordinary high-speed steel, therefore, the powder metallurgy high-speed steel of this similar technology has not yet been fully promoted

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Embodiment Construction

[0022]

[0023] In the preparation process, after the above raw materials are selected according to the corresponding content, 1.5 tons of intermediate frequency + electroslag remelting (or refining outside the furnace) → master alloy → vacuum atomization → sheathing → hot isostatic pressing → precision forging machine Forging→finishing→φ100mm round steel is the finished material.

[0024] Among them, the forging heating temperature of the precision forging machine is 1130-1160°C, the most suitable forging temperature is 950-1050°C, after forging, it should be cooled slowly, and the annealing should be heated to 900°C for 4 hours and then lowered to 720°C at a rate of less than 20°C / hour , furnace cooling, annealing hardness maximum 300HB.

[0025] Forming carbide morphology for embodiment one such as figure 1 , figure 2 As shown, the carbide distribution is uniform and fine, most of the carbides are between 1 and 3 μm, and the maximum is 6 μm.

[0026] After the above-...

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Abstract

The present invention relates to high-performance high-speed steel, and particularly to a high-hardness high-wear-resistant powder metallurgy high-speed steel which is manufactured according to a power metallurgy method and contains Al. The high-speed steel is composed of C, Si, Cr, Mo, V, W, Nb, Mn, Co, Al, Fe and impurities. The high-speed steel manufactured according to the technical solution has the following advantages: more than 67.5HRC of quenching-tempering hardness, better red hardness and wear resistance, stronger bending strength and lower cost.

Description

technical field [0001] The invention relates to a high-performance high-speed steel, in particular to an Al-containing high-hardness and high-wear-resistant powder metallurgy high-speed steel manufactured by a powder metallurgy method. Background technique [0002] The research and development of powder metallurgy high-speed steel began in 1965, and it was put into industrial production in the 1970s by Crucible Plant in the United States and Stora Plant in Sweden (now owned by Erasteel in France). powder + HIP hot isostatic pressing + precision forging" technology. The high-speed steel produced by the powder metallurgy process can remove almost all impurities in the steel, further improve the toughness of the material, and significantly improve the chipping resistance of the tool. It not only solves the problem of coarse carbide structure in the traditional metallurgical process, but also opens up a new path A new approach to high-speed steel with ultra-high alloy content t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/36C22C38/30C22C38/26C22C38/24C22C33/02
Inventor 吴立志郑伟方玉诚金成海
Owner HEYE SPECIAL STEEL
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