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工具钢、轴承钢和许多用来制造冷墩、冷挤压零件的结构钢,标准要求应具有粒状珠光体组织供火状态或在加工前进行球化退火处理。但是,常规球化退火的时间很长,需要16个小时左右,并且亚共析钢采用一般的球化退火工艺很难获得粒状珠光体组织。江苏省冶金研究所模具钢组的同志们经过一年多的试验,最近研究成功快速球化新工艺,只需要1个多小时就能达到球化的效果。试验钢种有T10A、GCr15、65M_n、60si_2M_n、60钢、45钢、20钢等。
Tool steels, bearing steels, and many structural steels used to make cold pier and cold extruded parts, the standard requires that the granular pearlite bodies be supplied with a fire condition or that the nodular annealing be performed prior to processing. However, the conventional spheroidizing annealing takes a long time and takes about 16 hours, and it is difficult to obtain the granular pearlite structure by the common spheroidizing annealing process in the sub-eutectoid steel. Metallurgical Institute of Jiangsu Province die steel group comrades after more than a year of testing, the recent success of the rapid study of new ball technology, only need more than 1 hour will be able to achieve the ball effect. Test steel species T10A, GCr15, 65M_n, 60si_2M_n, 60 steel, 45 steel, 20 steel and so on.