摘要
目前将铸锻复合成形技术应用于机械卡钳等的研究少见报道。为此,采用不同的浇注温度、保压时间和锻压力进行了A356-CrV新型铝合金机械卡钳试样的铸锻复合成形,并进行耐腐蚀性能及耐磨损性能的测试、分析。结果表明:随浇注温度的升高、保压时间的延长和锻压力的增加,A356-CrV新型铝合金机械卡钳试样质量损失率和磨损体积先减小后缓缓增大,耐腐蚀性能和耐磨损性能变化趋势为先提升然后下降。与700℃浇注温度比较,720℃浇注温度下的质量损失率和磨损体积分别减小了27.46%、33.33%;与15 s保压时间比较,25 s保压时间下的质量损失率和磨损体积分别减小了23.84%、28.00%;与60 MPa锻压力比较,90 MPa锻压力下的质量损失率和磨损体积分别减小了30.52%、37.93%。A356-CrV新型铝合金机械卡钳试样的优选铸锻复合工艺参数为:720℃浇注温度、25 s保压时间、90 MPa锻压力。
At present,there are few reports on the application of forging compound forming technology to mechanical calipers. Hence,the casting and forging compound forming of A356-Cr V new aluminum alloy mechanical caliper samples were carried out with different casting temperatures,holding time and forging pressure. The corrosion resistance and wear resistance of the samples were tested and analyzed. Results showed that with the increase of casting temperature,the holding time and forging pressure,the mass loss rate and wear volume of A356-Cr V new aluminum alloy mechanical caliper sample first decreased and then increased slowly,but the corrosion resistance and wear resistance first increased and then decreased. Compared with the casting temperature of 700 ℃,the mass loss rate and wear volume at the pouring temperature of 720 ℃ decreased by 27.46% and 33.33%,respectively. Compared with the 15 s holding time,the mass loss rate and the wear volume at 25 s holding time was reduced by 23.84% and 28.00%,respectively. Compared with the 60 MPa forging pressure,the mass loss rate and the wear volume at 90 MPa forging pressure were reduced by 30.52% and 37.93%,respectively. The optimized casting and forging compound process parameters of the A356-Cr V new aluminum alloy mechanical caliper sample were as follows: pouring temperature 720 ℃,holding time 25 s,and forging pressure 90 MPa.
作者
黄芳
徐扬
张雪晖
HUANG Fang;XU Yang;ZHANG Xue-hui(Zhejiang Industry Polyechnic College,Shaoxing 312000,China;School of Electromechanical and Automotive Engineering,Yantai University,Yantai 264005,China)
出处
《材料保护》
CAS
CSCD
2021年第1期131-135,共5页
Materials Protection
基金
浙江省教育厅一般科研项目(FG2014115)
国家自然科学基金青年基金(51804023)资助。
关键词
机械卡钳
铝合金
铸锻复合成形
耐腐蚀性能
耐磨损性能
mechanical caliper
aluminum alloy
casting and forging compound forming
corrosion performance
wear performance
