[问] 我们在离心浇注双金属轴瓦时,经常产生裂纹和缩松,质量很不稳定,不是裂就是缩松,有时缩松和裂纹同时产生,废品率很高,影响我们生产的顺利进行,成为生产的关键,请给我们介绍防止裂纹和缩松的方法,帮助我们解决这一生产关键。 (青海田一文) [Q] When we biconvex bimetallic bushings, we often produce cracks and shrinkage. The quality is very unstable. If we do not crack or shrink, we sometimes produce shrinkage and cracks simultaneously. The rejection rate is very high, affecting the smooth progress of our production. As the key to production, please give us a handy way to prevent cracking and shrinkage and help us to solve this production key. (Qinghai Tian Yiwen)