The strict requriement to control quenching distortion has been increasing with rapid development of China auto industry during this decade.As what happened in developed countries,China also begins to enter the period while the consumption of martempering oils increase obviously.Practices proving,though proper selection and preventive maintenance of oils,martempering Oils could eliminate many of the quenching stresses,obain dimensional stability,and meet strict requirement to control gear quenching distortion in China auto industry.
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