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采用不同工艺挤压了ASTM 1045钢制汽车活塞销,并进行了25℃室温和500℃高温下的耐磨损性能试验与分析。结果表明,随模具预热温度从160℃增大至240℃,挤压温度从500℃增大至700℃,或挤压速度从270 mm/min增大至390 mm/min,汽车活塞销的室温和高温磨损体积均先减小后增大,室温和高温耐磨损性能均先提高后下降。活塞销的最佳挤压工艺参数为:220℃模具预热温度、675℃挤压温度和360 mm/min挤压速度。
Using different technology extrusion of the ASTM 1045 steel automotive piston pin, and 25 ℃ room temperature and 500 ℃ high temperature wear resistance test and analysis. The results show that as the die preheating temperature increases from 160 ℃ to 240 ℃, the extrusion temperature increases from 500 ℃ to 700 ℃, or the extrusion speed increases from 270 mm / min to 390 mm / min, Both the room temperature and the high temperature wear volume first decreased and then increased, and the wear resistance at room temperature and high temperature first increased and then decreased. The optimal extrusion process parameters of the piston pin are: 220 ℃ mold preheating temperature, 675 ℃ extrusion temperature and 360 mm / min extrusion speed.