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Cr12钢的锻造必须注意以下几点: 一、原材料合格一般工厂都是采用圆截面坯料,内部质量应符合冶金部标准(YB),表面不得有任何缺陷。二、加热加热是个关键环节。要有充分的预热时间,严禁高温装炉,否则就得报废。毛坯在加热时必须缓慢,并且经常翻转毛坯,尽量减少坯料的温差,保证加热均匀。加热规范见图。三、变形方法 1.坯料温度高于1050℃(即刚出炉时)要轻打;在1050～900℃时要重打;低于900℃时又要轻打。这叫做“二轻一重”的打法。此法可保证
Cr12 steel forging must pay attention to the following points: First, the raw materials qualified General factory is the use of circular cross-section billets, the internal quality should meet the Metallurgical Department standard (YB), the surface shall not have any defects. Second, heating is a key link heating. Have sufficient warm-up time, no high temperature furnace, otherwise you have to scrap. The blank must be heated slowly, and often turn the blank, minimize the temperature difference of the blank, to ensure uniform heating. Heating specifications see figure. Third, the deformation method 1 billet temperature is higher than 1050 ℃ (that is, just when the oven) to be fought; in 1050 ~ 900 ℃ to be re-hit; below 900 ℃ have to be fought. This is called “two light weight” style of play. This method can be guaranteed