Elastic components use ultra-speed quenching oil instead of light diesel quenching

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 samples

60Si2Mn 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.

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