不锈钢螺纹连接咬死机理及预防措施研究
Research on Galling Mechanism of Stainless Steel Thread and Preventive Scheme

测试了不锈钢螺纹连接在慢速预紧与拆卸、快速预紧与拆卸、涂胶后快速预紧与拆卸3种条件下的抗咬死能力，分析不锈钢螺纹连接的咬死机理，提出了螺纹连接咬死的预防措施。研究表明，快速预紧和拆卸引起的螺牙间高温导致不锈钢螺牙表面发生严重黏着磨损。黏着磨损产生的磨屑在螺牙间堆积，阻碍了螺牙的旋合过程并最终引起咬死现象。涂胶和减小预紧和拆卸速度均可降低螺牙间温度，从而减轻黏着磨损，降低不锈钢螺纹连接发生咬死的概率。
The anti-galling ability of stainless steel bolt was investigated under three conditions, i.e. slow tightening and loosening, quick tightening and loosening and quick tightening and loosening after the application of glue. The galling mechanism of stainless steel bolt was analyzed and the anti-galling schemes were proposed. The test results show that the high temperature induced by quick tightening and loosening causes the serious adhesion wear at the threads. The wear debris are accumulated within the space between the threads, which prevents the movement of the threads and finally causes the galling of the bolt. The temperature of the threads can be reduced by applyingthe glue and the reduction in the speed of tightening and loosening, which alleviates the adhesion wear and suppresses the occurrence of galling