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我厂生产的解放牌汽车第一轴45钢突缘,(图1),长期以来,一直采用锻造——正火——粗加工——调质——精加工的传统工艺,在生产中,需要对零件进行多次加热和搬运,既费人力又费电。此外,由于零件形状特殊,如果调质工艺安排在粗加工之前,往往由于45钢的淬透性较差,影响产品质量;如果调质工序安排在粗加工之后,又往往由于零件缘边接近淬裂危险尺寸,易造成产品的大量开裂,有时报废竟达15%。
I plant the liberation of the first car shaft 45 steel flange, (Figure 1), for a long time, has been used forging - normalizing - roughing - quenching - finishing the traditional process, in the production, Parts need to be heated and handled many times, both labor and electricity. In addition, due to the special shape of parts, if the quenching and tempering process before roughing, often due to the poor hardenability of 45 steel, affecting product quality; if the quenching and tempering process is arranged after roughing, and often due to the edge of the part close to quenching Cracking dangerous size, easy to cause a lot of product cracking, sometimes as much as 15% scrapped.