我厂对于所制造的各种工具,不仅要求锻成余量较少的毛坯,而且要求毛坯的金相组织达到一定的技术要求。过去对空气锤的锻造用量未作规定,主要凭需要和经验来决定,以致锤杆经常处于超负荷状态,一般寿命只有6个月左右。自从试行锻造用量标准以来,已扭转了这种情况,一年来尚未发生锤杆断裂现象。现将这个标准的内容及试订依据介绍于下,以供参考。 I plant for the manufacture of a variety of tools, not only forging the remaining less forging blank, but also to meet the microstructure of rough meet certain technical requirements. In the past, there was no regulation on the amount of forging of an air hammer, which was mainly determined by the needs and experience so that the hammer rod was often in an overloaded condition with a typical life expectancy of only about 6 months. This has been reversed since the forging test was piloted, with no hammer breakage occurring in a year. Now the content of this standard and trial basis introduced below, for reference.