液态模锻工艺参数对汽车铝合金轮辋性能的影响
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摘要
采用不同的液态模锻工艺参数对汽车铝轮辋进行了成形,并进行了磨损和腐蚀性能的测试与分析。结果表明:比压为120 MPa时,与660℃浇注相比,720℃浇注试样的磨损体积减小了32%,腐蚀电位正移了116 m V。浇注温度为720℃时,与100 MPa成形的试样相比,120 MPa成形时试样的磨损体积减小了21%,腐蚀电位正移了92 m V。随浇注温度从660℃升高至740℃、比压从100 MPa升高至130 MPa,汽车铝轮辋的耐磨损性能和耐腐蚀性能均先提高后下降。适宜的浇注温度和比压分别为720℃和120 MPa。
The aluminum wheel rims of automobile were formed by different process parameters of liquid die forging.And the wear resistance and corrosion resistance were tested and analyzed. The results show that when the specitic pressure is120 MPa, compared with that of sample under the pouring temperature of 660℃, the wear volume of the sample poured at720℃ decreases by 32% and the corrosion potential of the sample shifts positively by 116 m V. When the pouring temperature is 720℃, compared with that of the sample formed at 100 MPa,the wear volume of the sample formed at 120 MPa decreases by 21% and the corrosion potential of the sample shifts positively by 92 m V. The wear resistance and corrosion resistance of the sample firstly increase and then decrease with the pouring temperature increasing from 660℃ to 740℃, and the specific pressure increasing from 100 MPa to 130 MPa. The suitable pouring temperature and specific pressure are 720℃ and 120 MPa, respectively.
The aluminum wheel rims of automobile were formed by different process parameters of liquid die forging.And the wear resistance and corrosion resistance were tested and analyzed. The results show that when the specitic pressure is120 MPa, compared with that of sample under the pouring temperature of 660℃, the wear volume of the sample poured at720℃ decreases by 32% and the corrosion potential of the sample shifts positively by 116 m V. When the pouring temperature is 720℃, compared with that of the sample formed at 100 MPa,the wear volume of the sample formed at 120 MPa decreases by 21% and the corrosion potential of the sample shifts positively by 92 m V. The wear resistance and corrosion resistance of the sample firstly increase and then decrease with the pouring temperature increasing from 660℃ to 740℃, and the specific pressure increasing from 100 MPa to 130 MPa. The suitable pouring temperature and specific pressure are 720℃ and 120 MPa, respectively.
引文
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[3]米国发,刘彦磊,张斌,等.夹杂物对轮辋裂纹萌生的影响[J].铁道学报,2010,32(4):108-113.
[4]张治民,王强,路光,等.重型车辆铝合金轮辋挤压成形技术及应用[J].机械工程学报,2012,48(18):55-59.
[5]郑伟龙,王明哲,张治民,等.铝合金轮辋成形工艺分析[J].热加工工艺,2013,42(17):92-93.
[6]向东.汽车轮辋热处理后的力学性能仿真分析[J].热加工工艺,2013,42(2):164-166.
[7]杨勇彪,张治民,王强,等.挤压7A04铝合金轮辋断裂失效分析[J].轻合金加工技术,2013,41(6):58-62.
[8]代颖辉.大直径、宽轮辋低压铸造A356铝合金车轮轮辋缺陷及性能的改进[J].铸造,2016,65(9):920-923.
[9]高杰,刘树华,张华,等.锻压工艺模拟时不同参数对金属性能的影响[J].机械工程与自动化,2012(3):28-29.
[10]刘静安.铝合金锻压生产现状及锻件应用前景分析[J].铝加工,2005(2):5-9.