现场生产中,发现9SiCr钢棒材球化退火组织的纵横向级别有差异。有时横向是良好的球状4级组织,而纵向却发现偏析带内含有大量的顺向排列的碳化物长球和片状珠光体组织。用户提出由于长球碳化物和片状珠光体的存在,使板牙的性能变坏,寿命降低,极易发生落齿事故,造成废品。 On-site production, found that 9SiCr steel bar annealing temperature and horizontal organization levels are different. Lateral is sometimes a good spherical 4 organizations, but found in the longitudinal segregation zone contains a large number of aligned carbide long and lamellar pearlite organization. Users suggested that due to the long ball carbides and pearlite flake presence, so that the performance of die teeth deteriorate, reduce life expectancy, falling teeth prone accidents, resulting in waste.