Henan Friend Metal Products Co., Ltd. is one of the leading manufacturers and suppliers of 55sicra oil quenching and tempering spring steel wire in China. If you're going to buy 55sicra oil quenching and tempering spring steel wire made in China, welcome to get more information from our factory. We also accept customized orders.
What is the quenching temperature？
Tempering can be done twice after quenching.Special-shaped spring to correct tempering, correct the tempering temperature should be lower than normally after tempering temperature 20 ℃ mercy, insulation 10 ~ 15 min, from air cooling.Then the final tempering is carried out. After the elastic scale is corrected, the spring is installed on the tempering finalizing fixture for final tempering.Tempering fixture should ensure that the spring pitch and free length meet the requirements.Tempering temperature is 420 ℃ + 10 ℃, 30 ~ 35 min, heat preservation from water.
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