Domestic 6542 high speed steel and 6542 alloy steel

  6542 ｜ 6542 high speed steel ｜ Changgang 6542 high speed steel ｜ 6542 high speed steel ｜ what price does 6542 high speed steel ｜ 6542 plate round steel high speed steel is the main material for manufacturing cutting tools with complex shape and difficult grinding
Ordinary high speed steel can meet general needs
There are two kinds of common high-speed steel, tungsten high-speed steel and tungsten molybdenum high-speed steel
Tungsten high speed steel The typical brand is W18Cr4V, the heat treatment hardness can reach 63-66hrc, the bending strength can reach 3500MPa, and the grindability is good Tungsten molybdenum high speed steel The typical brand is W6Mo5Cr4V2
At present, it is replacing tungsten high-speed steel
It has a series of advantages such as fine carbide, uniform distribution, high wear resistance and low cost
The hardness of heat treatment is the same as above, the bending strength reaches 4700mpa, and the toughness and thermoplastic are 50% higher than W18Cr4V
It is commonly used to manufacture various tools, such as drill bit, tap, milling cutter, reamer, * *, gear cutter, etc
, which can meet the requirements of processing general engineering materials
But its decarburization sensitivity is slightly stronger
Another brand of ordinary high-speed steel is W9Mo3Cr4V, which is a new variety developed in China in recent years
The strength and thermoplasticity are slightly higher than W6Mo5Cr4V2, and the hardness is hrc63-64
Combined with toughness, it is easy to roll and forge, with wide range of heat treatment process, low decarburization sensitivity and lower cost
The proportion of these three grades of ordinary high-speed steel in the Chinese market is: W18Cr4V, 16
5%; W6Mo5Cr4V2,  69％; W9Mo3Cr4V,11％。 High performance high speed steel high performance high speed steel has better hardness and thermal hardness, which is a new variety developed by changing the chemical composition and improving the properties of high speed steel
It has higher hardness and thermal hardness
When the cutting temperature reaches 650 ℃, the hardness can still be maintained above 60HRC
The durability is 1
5-3 times that of ordinary high-speed steel
It is suitable for manufacturing and processing tools for difficult to process materials such as superalloy, stainless steel, titanium alloy and high-strength steel
There are four main varieties: high carbon high-speed steel, high vanadium high-speed steel, cobalt containing high-speed steel and aluminum high-speed steel ? Cobalt high speed steel The brand is w2mo9cr4vco8 (American brand M42)
It is characterized by low vanadium content (1%) and high cobalt content (8%)
Cobalt can promote carbides to dissolve more in the base * * during quenching and heating, and use high matrix hardness to improve wear resistance
This kind of high-speed steel has good hardness, thermal hardness, wear resistance and grindability
The hardness of heat treatment can reach 67-70hrc, but special heat treatment methods are also adopted to obtain 67-68hrc hardness, so that its cutting performance (especially intermittent cutting) can be improved and its impact toughness can be improved
Cobalt high speed steel can be made into all kinds of cutting tools, which has good effect in cutting difficult machining materials
Because of its good grinding performance, it can be made into complex cutting tools, which is widely used in the world
However, China lacks cobalt resources and cobalt high-speed steel is expensive, which is about 5-8 times that of ordinary high-speed steel
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