Characteristics of the material 75KHMF ( 75HMF, 75ХМФ ).
75KHMF ( 75HMF, 75ХМФ )
Tool steel for roller
Chemical composition in % of the material 75KHMF ( 75HMF, 75ХМФ ) .
0.7 - 0.8
0.2 - 0.6
0.2 - 0.7
1.4 - 1.7
0.1 - 0.3
0.05 - 0.25
Temperature of critical points of the grade 75KHMF ( 75HMF, 75ХМФ ).
Ac1 = 760 - 790
Brinell hardness of the material 75KHMF ( 75HMF, 75ХМФ ) (normalize, tempering) ,
HB 10 -1= 241 - 285 MPa
Brinell hardness of the material 75KHMF ( 75HMF, 75ХМФ ) (quenching, tempering) ,
HB 10 -1= 352 - 429 MPa
Technological properties of the material 75KHMF ( 75HMF, 75ХМФ ) .
- welding is done without heating and subsequent heat treeting
- welding is possible under heating up to 100-120 grade and subsequent heat treeting
- obtaining the quality welding needs the additional operations:heating up to 200-300 grade; the heat treeting ia annealing
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