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解放牌载重汽车轮眙套筒搬手(见图1)现生产中采用45Mn2钢平锻,调质热处理。生产中存在下列问题: 1.45Mn2钢含碳含锰量较高。锻造性能较低碳合金钢差,锻造成型后,打孔时钻头磨损严重。2.由于平锻过程中,造成形状不规则。尺寸较差,杆长不等。给两端淬火带来困难,两端淬火长度保证不了图纸要求的30～38毫米。3.成品要求杆部弯曲度≤2毫米,表面缺陷深度≤0.8毫米,大头周壁差≤2毫米,小头周壁差≤1毫米,在平锻机上锻制,尺寸很难控制,经常造成尺寸
Jiefang license plate wheel truck wheel shuffle (see Figure 1) 45Mn2 steel is now used in production forging, quenching and tempering. The production of the following problems: 1.45Mn2 carbon content of manganese is higher. Forging performance of low carbon alloy steel is poor, after forging molding, drilling bit when drilling serious. 2 due to flat forging process, resulting in irregular shape. Poor size, bar length. Hardening to both ends of the difficulties, both ends of the quenching length can not guarantee the drawing requirements of 30 to 38 mm. 3. Finished product requirements rod curvature ≤ 2 mm, surface defect depth ≤ 0.8 mm, bulk weeks ≤ 2 mm wall thickness, small head circumference ≤ 1 mm, forging in the forging machine, the size is difficult to control, often resulting in size