High speed steel is a type of tool steel that contains more alloys such as tungsten, chromium, molybdenum, and vanadium. Its red hardness is higher than that of ordinary tool steel, and the allowable cutting speed is more than twice as high, so it is called high-speed steel.
Although the hardness, wear resistance, and red hardness of high-speed steel are not as good as those of hard alloys, the strength and toughness of the cutting edge of its manufacturing tools are higher than those of hard alloys, and it can withstand larger impact loads. Hardness is HRC62~65
① Ordinary high-speed steel W18Cr4VW6Mo5Cr4V2
2. High performance high-speed steel aluminum high-speed steel W6Mo5Cr4V2A1 hardness HRC68~69 cobalt high-speed steel 110W1.5Mo9.5Cr4VCo8 can be used to manufacture complex cutting tools
The function of W: W, together with Fe and Cr, forms high hardness carbides with C, which can improve the wear resistance of the material
The function of Mo is basically the same as W, and it can reduce the unevenness of carbides in steel, refine carbide particles, and increase the steel's ability to absorb mechanical energy.
To increase thermal hardening, elements such as Co and A1 are added
In order to improve wear resistance, the V amount can be appropriately increased, but as the V amount increases, the grindability becomes worse and worse.
