M35 Description M35 cobalt high speed steel containing low compared to the price and easy processing, through appropriate heat treatment, obtain a high hardness (HRC67 ~ 70), high red hardness (625 ℃, HRC63 ~ 65), and high wear resistance, toughness and resistance bending strength of not less than ordinary high-speed steel, can overcome the early damage to the mold edge collapse and crack and so on. M35 steel, equivalent to China's W6Mo5Cr4V2Co5 M35 steel carbon content localization issues depending on the product requirements for carbon content localization, rather than the carbon content of uniformly positioned within a certain fixed range. But no matter what position, shall ensure that, under normal conditions of heat treatment, hardness 66HRC, but the high carbon content, it will cause a lot of negative effects. Hardness hardness problem is the assessment of high speed steel cutting tools most intuitive technical indicators, but the most essential factor is the quality of heat treatment microstructure. So far though, the hardness is an assessment of the quality of heat treatment more intuitive quantitative indicators, but the hardness is a surface phenomenon, is the essence of the microstructure factor. Because all super-hard high-speed steel To achieve 66HRC or more, just little things, but to achieve the desired microstructure, quite difficult. Furthermore, all super-hard high-speed steel, and do not exceed the hardness limits. High-speed steel cutting tools does not mean hardness better. Can achieve high hardness and high hardness are two completely different issues. M35 steels for through proper heat treatment, can achieve 69HRC, but 69HRC tool is no practical value. For the M35 tool steel, depending on the application experience and information at home and abroad, the best hardness control in 66-67.5HRC more realistic. Standard Compare: AISI-M2JIS-SKH51 Factory state: annealing of the ball <225 properties and applications: this steel containing tungsten, cobalt high speed steel. Suitable manufacturing powerful cutting wear and impact resistant tools, and advanced die, screw die, more complex tools required toughness and shape, reamers, milling cutters, drills, red top. Forging temperature: 1100-900 ℃ temperature annealing: heating to 800-850 ℃, in this temperature stays for 2-4 hours in the oven to cool gradually. Cooling medium: air-cooled, oil, grade (550-580 ℃) best quenching temperature: between 1215-1225 ℃. Typical application examples: ① can be used to produce a variety of high-hard and ultra hard blades, drill bits, taps, broaches, hobs and various cutter. ② cold forging die, then Die cutting tool. ③ Recommended Case plant, screws and other cold stamping plant products industries.