Waste steel trucks and agricultural vehicle leaf springs that are scrapped by scrap steel are quenched by NH super-speed quenching oil to obtain high and uniform hardness and a large depth of hardened layer to improve the fatigue life of the spring. By using NH super-speed quenching oil instead of light diesel quenching, quenching soot can be significantly reduced to avoid quenching and cracking of the workpiece.
The quenching specifications are as follows:Quenching temperature 860 ° C, heated in a salt bath. The oil temperature is 60 ° C, and the workpiece is grayish white after quenching. The surface hardness of 65Mn steel of different size samples after quenching is shown in the following table.Table: Surface hardness after quenching of 65Mn steel of different size samples60Si2Mn steel large elastic round spring and leaf spring, quenched by NH super-speed quenching oil, can obviously improve the depth of hardened layer and spring fatigue performance, reduce quenching soot, avoid oil surface ignition during quenching, improve working environment.
Forged Cast Steel Gate Valve,Anti-Theft Valve,Heavy Carbon Steel,Metal Seal Valve
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