奥氏体不锈钢预应变效果评价
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摘要
对奥氏体不锈钢进行预应变是为了获得良好的机械性能,预应变效果评价是改进钢材生产工艺的基础。应用概率论与数理统计知识,建立了预应变效果的评价体系:用F分布评价预应变对机械性能参数标准差的改变效果,用t分布评价预应变对机械性能参数均值的改变效果。以奥氏体不锈钢S30408的预应变效果评价为例,基于液氮温度下的有效拉伸试验数据,在双侧置信度为99%时,评价了S30408钢的9%预应变效果:(1) 9%预应变明显提高S30408钢屈服强度均值,其标准差基本不变;(2) 9%预应变对于S30408钢抗拉强度的均值与标准差基本无影响。
Pre-strain on austenitic stainless steel was a method in order to obtain good mechanical properties,the pre-strain effect evaluation was the basis of improving the production process of the steel. Applying the theory of probability and mathematical statistics,the evaluation system of pre-strain effect was established: the pre-strain effect on the mechanical properties parameter standard deviation was evaluated,using F-distribution; the pre-strain effect on the mechanical properties parameter mean value was evaluate,using t-distribution. For example of pre-strain effect on austenitic stainless steel S30408,based on the effective tensile test data at liquid nitrogen temperature,and the bilateral confidence was 99%,the effect of 9%-prestrain on the steel was evaluated: 1) 9%-pre-strain significantly increases the yield strength of steel S30408,and the standard deviation is basically unchanged; 2) for steel S30408 tensile strength,9%-pre-strain is no effect on the mean and the standard deviation.
Pre-strain on austenitic stainless steel was a method in order to obtain good mechanical properties,the pre-strain effect evaluation was the basis of improving the production process of the steel. Applying the theory of probability and mathematical statistics,the evaluation system of pre-strain effect was established: the pre-strain effect on the mechanical properties parameter standard deviation was evaluated,using F-distribution; the pre-strain effect on the mechanical properties parameter mean value was evaluate,using t-distribution. For example of pre-strain effect on austenitic stainless steel S30408,based on the effective tensile test data at liquid nitrogen temperature,and the bilateral confidence was 99%,the effect of 9%-prestrain on the steel was evaluated: 1) 9%-pre-strain significantly increases the yield strength of steel S30408,and the standard deviation is basically unchanged; 2) for steel S30408 tensile strength,9%-pre-strain is no effect on the mean and the standard deviation.
引文
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[13]刘小宁,刘岑,刘兵,等.屈强比对容器爆破压力计算公式精度的影响[J].应用力学学报,2017,34(1):141-147.LIU Xiao Ning,LIU Cen,LIU Bing,et al.Yield ratio influence on calculating formula precision of vessel burst pressure[J].Chinese Journal of Applied Mechanics,2017,34(1):141-147(In Chinese).
[14]刘小宁,刘岑,张红卫,等.对“基于实测数据的特种球形压力容器爆破压力计算公式”一文的商榷[J].应用数学和力学,2016,37(5):542-550.LIU Xiao Ning,LIU Cen,ZHANG Hong Wei,et al.Discussion on‘reconstructed formulas calculating bursting pressure of the special spherical pressure vessels based on experimental data’[J].Applied Mathematics and Mechanics,2016,37(5):542-550(In Chinese).
[15]刘岑,刘小宁,刘兵,等.拓展设计公式应用范围的精度比较法[J].机械强度,2018,40(1):145-153.LIU Cen,LIU Xiao Ning,LIU Bing,et al.Precision comparison method of expansion design formula applied range[J].Journal of Mechanical Strength,2018,40(1):145-153(In Chinese).
[16]刘小宁,刘岑,吴元祥,等.超高压圆筒容器爆破压力计算公式的比较[J].机械强度,2015,37(2):373-376.LIU Xiao Ning,LIU Cen,WU YuanXiang,et al.Burst pressure caculation formula compare of super-high pressure cylinder vessel[J].Journal of Mechanical Strength,2015,37(2):373-376(In Chinese).
[2]中华人民共和国国家标准.GB/T 13239-2006,金属材料低温拉伸试验方法[S].北京:中国标准出版社,2006:1-24.National Standard of the People’s Republic of China.GB/T 13239-2006,Metallic materials-tensile testing at low temperature[S].Beijing:Chinese Standard Press,2006:1-24(In Chinese).
[3]徐灏.机械强度的可靠性设计[M].北京:机械工业出版社,1984:1-269.XU Hao.Mechanical strength reliability design[M].Beijing:Mechanical Industry Press,1984:1-269(In Chinese).
[4]郑津洋,王珂,黄泽,等.液氮温度下奥氏体不锈钢强度试验研究[J].压力容器,2014,31(8):1-6.ZHENG Jin Yang,WANG Ke,HUANG Ze,et al.Study on strength of austenite stainless steel under liquid-nitrogen temperature[J].Pressure Vessel Technology,2014,31(8):1-6(In Chinese).
[5]黄泽,缪存坚,李涛,等.预拉伸奥氏体不锈钢常温拉伸力学性能试验研究[J].压力容器,2013,30(6):7-11.HUANG Ze,MIAO CunJian,LI Tao,et al.Experimental study on tensile mechanical properties of prestrained austenitic stainless steel at normal atmospheric temperature[J].Pressure Vessel Technology,2013,30(6):7-11(In Chinese).
[6]李清,袁小会,刘岑,等.有效试验数据对钢材机械性能分布规律的影响[J].武汉工程大学学报,2015,37(4):69-73.LI Qing,YUAN Xiao Hui,LIU Cen,et al.Validity test data effect on steel mechanical properties distribution law[J].Journal of Wuhan Institute of Technology,2015,37(4):69-73(In Chinese).
[7]刘岑,吴元祥,刘兵,等.奥氏体不锈钢S30408抗拉强度分布规律研究[J].河北工业科技,2016,33(1):31-34.LIU Cen,WU Yuan Xiang,LIU Bing,et al.Research in tensile strength distribution of austenitic stainless steel S30408[J].Hebei Journal of Industrial Science and Technology,2016,32(1):31-34(In Chinese).
[8]熊德之,张志军.概率论与数理统计及其应用[M].北京:科学出版社,2007:151-152;2007:261;2007:268.XIONG De Zhi,ZHANG Zhi Jun.Application of probability theory and mathematical statistics[M].Beijing:Science Press,2007:151-152;2007:261;2007:268(In Chinese).
[9]化学工程手册编辑委员会.化工应用数学[M].北京:化学工业出版社,1983:30.Editorial Board of Chemical Engineering Handbook.Chemical application mathematics[M].Beijing:Chemical Industry Press,1983:30(In Chinese).
[10]中华人民共和国国家标准.GB/T 24511-2009,承压设备用不锈钢钢板及钢带[S].北京:中国标准出版社,2009:1-17.National Standard of the People’s Republic of China.GB/T 24511-2009,Stainless steel plate,sheet and strip for pressure equipment[S].Beijing:Chinese Standard Press,2009:1-17(In Chinese).
[11]刘小宁,刘岑,刘兵,等.单层厚壁内压圆筒设计公式改进效果的可靠性研究[J].机械强度,2016,38(2):276-283.LIU Xiao Ning,LIU Cen,LIU Bing,et al.Improvement effect reliability research on single-layer thick-walled internal pressure cylinder design formulas[J].Journal of Mechanical Strength,2016,38(2):276-283(In Chinese).
[12]杨帆,刘岑,刘兵,等.钢制薄壁容器爆破压力计算公式评价[J].现代制造工程,2016(11):124-128.YANG Fan,LIU Cen,LIU Bing,et al.Evaluation of burst pressure calculation formula of steel thin-walled vessels[J].Modern Manufacturing Engineering,2016(11):124-128(In Chinese).
[13]刘小宁,刘岑,刘兵,等.屈强比对容器爆破压力计算公式精度的影响[J].应用力学学报,2017,34(1):141-147.LIU Xiao Ning,LIU Cen,LIU Bing,et al.Yield ratio influence on calculating formula precision of vessel burst pressure[J].Chinese Journal of Applied Mechanics,2017,34(1):141-147(In Chinese).
[14]刘小宁,刘岑,张红卫,等.对“基于实测数据的特种球形压力容器爆破压力计算公式”一文的商榷[J].应用数学和力学,2016,37(5):542-550.LIU Xiao Ning,LIU Cen,ZHANG Hong Wei,et al.Discussion on‘reconstructed formulas calculating bursting pressure of the special spherical pressure vessels based on experimental data’[J].Applied Mathematics and Mechanics,2016,37(5):542-550(In Chinese).
[15]刘岑,刘小宁,刘兵,等.拓展设计公式应用范围的精度比较法[J].机械强度,2018,40(1):145-153.LIU Cen,LIU Xiao Ning,LIU Bing,et al.Precision comparison method of expansion design formula applied range[J].Journal of Mechanical Strength,2018,40(1):145-153(In Chinese).
[16]刘小宁,刘岑,吴元祥,等.超高压圆筒容器爆破压力计算公式的比较[J].机械强度,2015,37(2):373-376.LIU Xiao Ning,LIU Cen,WU YuanXiang,et al.Burst pressure caculation formula compare of super-high pressure cylinder vessel[J].Journal of Mechanical Strength,2015,37(2):373-376(In Chinese).