Expert Yogi
Posts: 6088
  
| Spheroidizing annealing: the ideal spheroidizing structure can be obtained by using 850 ? heating, oil cooling quenching and short-time isothermal spheroidizing process (heating at 790 ? for 25min, quenching to 680 ? for 1h, furnace cooling to 500 ?. The normal quenching temperature of 60Si2Mn steel is 850 ? ~ 870 ?, oil cooling. The tempering temperature depends on the hardness requirements of die parts, such as
400 ? tempering, hardness 46hrc;
500 ? tempering, hardness 40HRC;
600 ? tempering, hardness 34hrc.
The tempering performance can be best matched between 150 ~ 160 degrees, and the tempering brittle zone of about 300 degrees must be avoided. Tools and dies with high toughness and measuring tools with good dimensional stability are required. The tempering temperature can be increased to about 250 degrees, and the hardness is 55 ~ 60HRC, which has good toughness.
AC1-755,Ac3=810,Ar1=700,Ar3=770,Ms-300~305,export standard 1.2mm Stainless Steel Wire Rope 7x7
Annealing; 750C furnace cooling HBS = 222
Normalizing; 830 ~ 860c air cooling HBS = 302
quench; 870c oil HRC > 6112mm carbon steel round bar with high quality
Hardness value after tempering at different temperatures HRC: 150c-61200c-60300c-56400c-51500c-43550c-38600c-33650c-29
Common tempering temperature 430 ~ 480c, water or air, hrc45 ~ 50
The following are the heat treatment parameters of automobile leaf springStainless steel Coil 201 nickel non magnetic
The holding time of quenching heating is related to the thickness: mm / min, 6.5/2, 8 / 3, 8.5-10 / 4, 12 / 5
Tempering holding time is related to thickness: mm / min, < 10 / 25-30, 10-15 / 30-35, 15-20 / 40-45, 20-25 / 45-50.
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Heat treatment process of 60Si2Mn round steel
