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JIS钢铁热处理手册,对热处理技术人员来说,是本良好的指导书籍。但具体应用时,却有许多地方使人感到奇怪,主要有如下七点: 1.没有规定保温时间热处理的加热温度和保温时间是最关键的参数,如果不规定这两项,热处理就无法进行。然而JIS手册中,虽然对淬火温度和回火温度作了规定,但没有规定保温时间。如果说保温时间是根据工件的大小而不同,所以不作规定,那么温度怎么又可不根据工件的大小而定出来呢? JIS手册上的热处理方法都是对JIS标准试样而言(如结构钢为φ25mm;工具钢为15mm的圆钢或方钢,长度均为20mm)。那么尺寸既规定了,按理保温时间也可以确定下来,为什么不把它规定下来呢?手
JIS steel heat treatment manual, for heat treatment technicians, is a good guide book. But the specific application, there are many places people feel strange, mainly in the following seven points: 1. There is no provision for holding time heat treatment heating temperature and holding time is the most critical parameters, if you do not specify these two, heat treatment can not be carried out . However, in the JIS manual, although the quenching temperature and tempering temperature are stipulated, there is no stipulation of the holding time. If the holding time is different according to the size of the workpiece, so no rules, then how the temperature can not be determined according to the size of the workpiece? JIS manual on the heat treatment methods are in terms of JIS standards (such as structural steel φ25mm; tool steel is 15mm round or square steel, the length is 20mm). Then the size is not only provided, according to reason can also determine the holding time down, why not rule it down?