论文部分内容阅读
亚共析钢工件,当过冷奥氏体快冷至M_s点以下时,由于三类内应力的交互作用,常易发生较大的翘曲变形,甚至开裂,使工件报废。若正确应用亚温延迟淬火(亦称预冷淬火)工艺,可获得微变形处理的效果。1.工艺方法用两台SX-4-10箱式电阻炉加热,处理45钢轴类零件(易测变形量)。一台电阻炉升温到45钢的完全奥氏体化温度820±20℃,另一台升温到45钢的Ar_1～A_(c1),的亚温温度700+10～20℃,工件置于第一台炉内加
Sub-eutectoid steel workpiece, when the rapidly cooled austenite below M_s point, due to the interaction of the three types of internal stress, often prone to greater warping deformation, or even cracking, the workpiece scrapped. If the correct application of sub-temperature delayed quenching (also known as pre-cooling quenching) process, the effect of micro-deformation can be obtained. 1. Process method with two SX-4-10 box resistance furnace heating, processing 45 steel shaft parts (easy to measure deformation). A resistance furnace is heated up to a temperature of 820 ± 20 ° C. for the complete austenite of 45 steel, and another Ar_1-A_ (c1) heated to 45 steels is heated to a temperature of 700 + 10 to 20 ° C. The workpiece is placed in a A furnace plus