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Powder high-speed steel cutting tools manufacturer in the field of application - powder high speed s by egfveg

Although the overall market is concerned, and solid carbide Tools Compared to the share of high-speed steel tool down, but in some applications, the tool toughness is still essential. Therefore, high-speed steel cutting tools still an economical choice.

High-speed steel tool is still in place processing industry, mainly due to its manufacturing process to a significant progress on: Powder Metallurgy High-speed steel was born. This method is introduced in 1970 after the special steel industry, quickly promoted to improve the performance of high speed steel. Wear resistance while maintaining the existing circumstances, to the level of hardness close to the carbide. ?

Powder metallurgy high speed steel is the main process: to have joined the pre-mixing of alloying elements of high speed steel, melting induction furnace, and then gas spray granulation. This process is a bit like spray cologne from the bottle. However, and spray cologne difference is, molten steel into uniform after the emission of rapidly solidified particles. Then the compressible particles into a large drum, for hot isostatic pressing, forming dense rough, and then forging or rolling. ?

Most important feature of this approach is the variety of alloying elements can be uniformly distributed within the steel, so as to solve the original steel ingot law an inherent problem: within the alloy elements in steel segregation. Segregation caused by products of inconsistency will affect the material performance. ?

In addition, the powder metallurgy method can make the steel of alloying elements increased significantly in ingot steel in the traditional process is not. ?

Carpenten powder products, the company's technical services manager BudCarnes pointed out that a company called Micro-MeltMaxanet powder high speed steel, tungsten-13% Co 10%, 6% vanadium, chromium 4.75%, carbon content up to 2.15%. If using powder metallurgy method, can not achieve such a high alloy content. He said: "Perhaps we have such a high alloy content of steel ingots cast out, and perhaps the cooling and solidification of steel ingot in no cracks. But ultimately uneven internal structure of the problem is unavoidable, will form a large ingot carbides segregation. "?

Crucible Materials Corporation vice president of technology JellyWright agree with this view, the conventional ingot process that limits the content of alloying elements. He said: "The process of high speed steel powder difference is, a rapid solidification spray granulation, formed a special fine carbides, the maximum diameter of 3 m, the average 1 m. The process of formation of carbide ingot diameter 40 m.

Typical high-speed steel alloy elements are: carbon, chromium, molybdenum, tungsten, vanadium and cobalt. Tungsten, molybdenum, cobalt's role is to improve the material's "red hard", so that it can withstand cutting tool and workpiece friction heat. In accordance with the Association of American metal "materials handbook" the most hard vanadium carbide formation, resulting in improved high-temperature wear resistance. ?

GriggrSteel MarkMullen vice president and general manager said the company high-speed steel powders and Development Center, a large number of alloying elements added in the technological aspects of high speed steel, a series of concrete progress is being made. He said: "With the continuous improvement of production methods, steel workers are now increasingly able to refining the content of the alloy material. And through these different alloy composition, can be obtained for the use of different characteristics."?

Carpenter's new high-alloy high speed steel Micro-MeltMaxanet, at the test temperature to 1000 F (538 ), its red hardness is 63.0HRC. Heat treatment parameters: austenite transition temperature of 2250 F (1232 ), annealing temperature of 1025 F (552 ). Compared with the T-15 conventional high-speed steel, in similar conditions, the red hard to 580HRC.

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Article Source: http://www.earticlesonline.com/Article/Powder-high-speed-steel-cutting-tools-manufacturer-in-the-field-of-application---powder-high-speed-s/906746