影响液态模锻脱模因素的试验研究
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摘要
液态模锻比压铸和锻造更难以脱模,容易造成模具损坏。本文探讨了低温碳氮共渗工艺和凹凸模间隙对液锻件脱模的影响。结果表明:低温碳氮共渗后模具表面形成的氮化物层在模具表面与铝液接触后形成一层Al N化合物层,能阻止铝液的侵蚀。温度和压力的作用会增大模具间隙,凸凹模间隙太大会造成脱模困难,一般模具间隙单边0.03mm比较合适。
Liquid die forging is more difficult to demoulding than die casting and forging, and it is easy to cause die damage. The effects of low temperature carbon-nitrogen co-infiltration process of die and concave and punch clearance on the demoulding of liquid forgings were discussed. The results show that the nitride layer formed on the surface of the die after the low-temperature carbon-nitrogen co-infiltration reacts with the aluminum liquid to form a layer of Al N compound, which can prevent the erosion of the aluminum liquid. The effect of temperature and pressure can increase the gap of the die, too large gap of the concave-convex die can cause the demoulding difficulty, and the suitable one-sided gap of the die is 0.03 mm.
Liquid die forging is more difficult to demoulding than die casting and forging, and it is easy to cause die damage. The effects of low temperature carbon-nitrogen co-infiltration process of die and concave and punch clearance on the demoulding of liquid forgings were discussed. The results show that the nitride layer formed on the surface of the die after the low-temperature carbon-nitrogen co-infiltration reacts with the aluminum liquid to form a layer of Al N compound, which can prevent the erosion of the aluminum liquid. The effect of temperature and pressure can increase the gap of the die, too large gap of the concave-convex die can cause the demoulding difficulty, and the suitable one-sided gap of the die is 0.03 mm.
引文
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[4]孙跃军,崔泽文,高艳静,等.双级时效对液态模锻6061铝合金性能的影响[J].金属热处理,2019,44(1):26-29.
[5]傅日光.低压铸造常见缺陷分析与防治方法[J].科技资讯,2010(25):121-124.
[6]葛素静,宗福春,刘锐.轻合金轮毂液态模锻技术及发展[J].热加工工艺,2014,43(7):14-16.
[7]李腾训,孔建.基于Pro/E的液锻模具二次开发设计研究[J].热加工工艺, 2014, 43(1):119-121.
[8]江秉华,成虹,彭志平.冲压模具间隙对模具寿命的影响[J].机械设计与制造, 2010(9):229-231.
[9]胡洪. A356铝合金汽车轮毂液态模锻成形技术研究[D].南昌:南昌航空大学,2018.
[10]杨金岭,杨荔.镁、铝合金车轮液态模锻成形模具设计[J].制造技术与机床,2016(10):157-162.
[11]郭洪.钢液态模锻模具关键参数的设计准则研究[D].北京:北京交通大学,2014.
[2]郑刚,李京.某大型铝零件的低压铸造[J].热加工工艺,2010,39(8):79-82.
[3]田晓生,刘杰,张明新,等.液态模锻A356铝合金汽车轮毂的微观组织及性能[J].热加工工艺,2016,45(17):150-151.
[4]孙跃军,崔泽文,高艳静,等.双级时效对液态模锻6061铝合金性能的影响[J].金属热处理,2019,44(1):26-29.
[5]傅日光.低压铸造常见缺陷分析与防治方法[J].科技资讯,2010(25):121-124.
[6]葛素静,宗福春,刘锐.轻合金轮毂液态模锻技术及发展[J].热加工工艺,2014,43(7):14-16.
[7]李腾训,孔建.基于Pro/E的液锻模具二次开发设计研究[J].热加工工艺, 2014, 43(1):119-121.
[8]江秉华,成虹,彭志平.冲压模具间隙对模具寿命的影响[J].机械设计与制造, 2010(9):229-231.
[9]胡洪. A356铝合金汽车轮毂液态模锻成形技术研究[D].南昌:南昌航空大学,2018.
[10]杨金岭,杨荔.镁、铝合金车轮液态模锻成形模具设计[J].制造技术与机床,2016(10):157-162.
[11]郭洪.钢液态模锻模具关键参数的设计准则研究[D].北京:北京交通大学,2014.