Heat treatment process of 60Si2Mn round steel

Posted by Wangkiky Wangkiky over 6 months ago

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，[url=http://www.anticorrosionsteel.com/steel-supply/5450.html]hot dipped galvanizing metal steel price per kg[/url] Annealing; 750C furnace cooling HBS ≤ 222 Normalizing; 830 ～ 860c air cooling HBS ≤ 302 quench; 870c oil HRC > 61[url=http://www.anticorrosionsteel.com/sheet-plate/5735.html]Standard Q235 Hot Rolled Mild Steel Plate For Building System[/url] 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 spring[url=http://www.alloysteelasia.com/sheet-plate/406.html]OEM service prime quality stainless steel flat bar suppliers[/url] 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.