Zhejianglitong machinery parts co.,ltd Zhejiang Litong Machinery Parts Co., Ltd. is online. Welcome new and old customers to order and negotiate business. We sincerely look forward to your arrival. | Adjusting and tempering process of motorcycle sprocket to reduce quenching stress By increasing the tempering times, the quenched martensite can be fully transformed and the stability of retained austenite can be improved, which can avoid or reduce the occurrence of grinding cracks. |