利用振动时效控制铸件尺寸稳定性和残余应力的试验研究
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摘要
为了降低铸件变形和残余应力等缺陷对其使用寿命和结构强度的影响,利用振动时效对所设计的45铸钢结构件进行处理,并采用三坐标测量仪对铸件尺寸的4个时间段变化量进行测量,使用钻孔法测量了其残余应力。结果表明,振动时效处理后,平面度变化量平均降低了50.8%,角度变化量平均降低了58.4%,圆柱度变化量平均降低了66.9%,残余应力平均降低了42.5%,明显的提高了铸件尺寸的稳定性和降低了其残余应力。
In order to reduce the effect of casting deformation and residual stressuse on service life and structural strength,the 45 steel casting was treated by vibratory stress relief(VSR). The casting dimensional change was measured for four periods by the three coordinate measuring instrument, and the residual stress was measured by the hole drilling method.The results show that flatness variation is reduced by an average of 50.8% and angle variation is reduced by an average of 58.4% and cylindricity variation is reduced by an average of 66.9%, residual stress is reduced by an average of 42.5% after vibratory stress relief. Dimensional stability is clearly improved and its residual stress is obviously reduced.
In order to reduce the effect of casting deformation and residual stressuse on service life and structural strength,the 45 steel casting was treated by vibratory stress relief(VSR). The casting dimensional change was measured for four periods by the three coordinate measuring instrument, and the residual stress was measured by the hole drilling method.The results show that flatness variation is reduced by an average of 50.8% and angle variation is reduced by an average of 58.4% and cylindricity variation is reduced by an average of 66.9%, residual stress is reduced by an average of 42.5% after vibratory stress relief. Dimensional stability is clearly improved and its residual stress is obviously reduced.
引文
[1]黄天佑,刘小刚,康进武,等.我国大型铸钢件生产的现状与关键技术[J].铸造,2007,56(9):899-904.
[2]胡在矶,詹晋浩.振动时效和热时效的特性对比[J].铸造技术,2000,21(3):17-20.
[3]芦亚萍,何闻.振动时效机理及其对疲劳寿命的影响分析[J].农业机械学报,2006,37(12):197-200.
[4]Chirita G,Stefanescu I,Soares D,et al.Influence of vibration on the solidification behaviour and tensile properties of an Al-18wt%Si alloy[J].Materials&Design,2009,30(5):1575-1580.
[5]Omura N,Murakami Y,Li M,et al.Effects of mechanical vibration on macrostructure and mechanical properties of AC4C aluminum alloy castings[J].Materials Transactions,2009,50(11):2578-2583.
[6]Sun M C,Sun Y H,Wang R K.Vibratory stress relieving of welded sheet steels of low alloy high strength steel[J].Materials Letters,2004,58(7):1396-1399.
[7]Lu Q,Chen L,Ni C.Improving welded valve quality by vibratory weld conditioning[J].Materials Science and Engineering:A,2007,457(1):246-253.
[8]刘杨,张宇,钱海盛,等.振动时效消除大型机床床身残余应力的研究[J].热加工工艺,2016,45(15):225-228.
[9]陈光忠.VSR改善铝合金淬火与焊接残余应力的试验研究[J].热加工工艺,2015,44(24):173-175.
[10]胡敏,余常武,赵万华,等.机床基础大件振动时效工艺参数优化方法[J].中国机械工程,2014,25(23):3137-3142.
[11]杨宽,卫桁.频谱谐波振动时效技术在切割机底座中的应用[J].铸造技术,2013,34(2):243-245.
[12]刘倩倩,刘兆山,宋森,等.残余应力测量研究现状综述[J].机床与液压,2011,39(11):135-138.
[13]高葛.振动时效机理研究[J].铸造技术,2011,32(4):462-464.
[2]胡在矶,詹晋浩.振动时效和热时效的特性对比[J].铸造技术,2000,21(3):17-20.
[3]芦亚萍,何闻.振动时效机理及其对疲劳寿命的影响分析[J].农业机械学报,2006,37(12):197-200.
[4]Chirita G,Stefanescu I,Soares D,et al.Influence of vibration on the solidification behaviour and tensile properties of an Al-18wt%Si alloy[J].Materials&Design,2009,30(5):1575-1580.
[5]Omura N,Murakami Y,Li M,et al.Effects of mechanical vibration on macrostructure and mechanical properties of AC4C aluminum alloy castings[J].Materials Transactions,2009,50(11):2578-2583.
[6]Sun M C,Sun Y H,Wang R K.Vibratory stress relieving of welded sheet steels of low alloy high strength steel[J].Materials Letters,2004,58(7):1396-1399.
[7]Lu Q,Chen L,Ni C.Improving welded valve quality by vibratory weld conditioning[J].Materials Science and Engineering:A,2007,457(1):246-253.
[8]刘杨,张宇,钱海盛,等.振动时效消除大型机床床身残余应力的研究[J].热加工工艺,2016,45(15):225-228.
[9]陈光忠.VSR改善铝合金淬火与焊接残余应力的试验研究[J].热加工工艺,2015,44(24):173-175.
[10]胡敏,余常武,赵万华,等.机床基础大件振动时效工艺参数优化方法[J].中国机械工程,2014,25(23):3137-3142.
[11]杨宽,卫桁.频谱谐波振动时效技术在切割机底座中的应用[J].铸造技术,2013,34(2):243-245.
[12]刘倩倩,刘兆山,宋森,等.残余应力测量研究现状综述[J].机床与液压,2011,39(11):135-138.
[13]高葛.振动时效机理研究[J].铸造技术,2011,32(4):462-464.