Ductile iron quenching and tempering

- Mar 03, 2017 -

In order to improve the mechanical properties of ductile iron, the general casting heated to Afc1 above 30 ~ 50 ℃ (Afc1 represents the formation of the final temperature when heated), heat quenched into the oil, get martensite. In order to properly reduce the residual stress after quenching, the general quenching should be tempered, low temperature tempering organization for the back of the Martian for the addition of residual bainite plus spherical graphite. This kind of tissue wear resistance is good, for demanding high wear resistance, high strength parts. The tempering temperature is 350-500 ℃. After tempering, the microstructure is tempered and the spherical graphite is applied. It is suitable for thick parts with good abrasion resistance and elasticity. Bo Yang - the relevant talent more concentrated in the steel excellence network. High temperature tempering temperature of 500-60D ℃, after tempering the organization for the tempered cable for the spherical graphite, with toughness and strength combined with a good 500-60D ℃, after tempering the organization for the return of the cable for the spherical graphite , With toughness and strength combined with good overall performance, so widely used in production.

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