快速冷却对304奥氏体不锈钢低温气体渗碳强化的影响
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摘要
利用光学显微镜、X射线衍射仪、电子探针X射线微区分析仪、显微硬度计和残余应力分析仪研究了不同冷却速度下304奥氏体不锈钢低温气体渗碳后的性能。结果表明:渗碳后各试样表面均形成一层高硬度、高残余压应力的扩张奥氏体层,表面强化效果显著。经不同冷却速度处理后,试样表面的显微形貌、物相组成、碳浓度分布、硬度和残余应力均无明显差异,说明快速冷却对304奥氏体不锈钢低温气体渗碳强化并无影响。
The properties of low-temperature gaseous carburized 304 austenite stainless steel after different cooling rates were investigated by optical microscope, XRD, electron probe X-ray microanalyzer, microhardness tester and residual stress analyzer. The results show that an expanded austenite layer with the characteristics of high hardness and high residual compressive stress is generated on the surface of each specimen after carburization, which has significant surface strengthening effect. However, there is no obvious difference in micro-morphology, phase composition, carbon concentration distribution, hardness and residual stress of the samples treated at different cooling rates, which indicates that rapid cooling has no influence on the low-temperature gaseous carburization strengthening of 304 austenite stainless steel.
The properties of low-temperature gaseous carburized 304 austenite stainless steel after different cooling rates were investigated by optical microscope, XRD, electron probe X-ray microanalyzer, microhardness tester and residual stress analyzer. The results show that an expanded austenite layer with the characteristics of high hardness and high residual compressive stress is generated on the surface of each specimen after carburization, which has significant surface strengthening effect. However, there is no obvious difference in micro-morphology, phase composition, carbon concentration distribution, hardness and residual stress of the samples treated at different cooling rates, which indicates that rapid cooling has no influence on the low-temperature gaseous carburization strengthening of 304 austenite stainless steel.
引文
[1]郭清泉,黄惠民,陈焕钦.石化行业用金属防腐涂料现状及发展[J].腐蚀科学与防护技术,2006,18(1):46-49.
[2]凤仪.金属材料学[M].北京:国防工业出版社,2009.
[3]余果,巩建鸣,荣东松,等.表面形貌对316L奥氏体不锈钢低温气体渗碳试验的影响[J].热加工工艺,2017,46(4):174-176.
[4]Tsujikawa M,Egawa M,Ueda N,et al.Effect of molybdenum and copper on S-phase layer thickness of low-temperature carburized austenitic stainless steel[J].Surface and Coatings Technology,2008,202:5488-5492.
[5]Parascandola S,Moller W,Williamson D L.The nitrogen transport in austenitic stainless steel at moderate temperatures[J].Applied Physics Letters,2000,76:2194-2196.
[6]徐德佳,郭建宁.30CrMnSiNi2A钢离合器轴渗碳淬火工艺[J].金属热处理,2013,38(10):82-83.
[7]徐子健,魏绍鹏,周鹏,等.18Cr2Ni4WA钢真空渗碳后热处理工艺的优化[J].金属热处理,2014,39(9):32-35.
[8]王成伟.17CrNiMo6钢花键齿轮轴渗碳淬火畸变控制[J].金属热处理,2015,40(11):188-190.
[9]Peng Y,Gong J,Jiang Y,et al.The effect of plastic pre-strain on low-temperature surface carburization of AISI 304austenitic stainless steel[J].Surface and Coatings Technology,2016,304:16-22.
[10]Marchev K,Cooper C V,Blucher J T,et al.Conditions for the formation of a martensitic single-phase compound layer in ion-nitrided 316L austenitic stainless steel[J].Surface and Coatings Technology,1998,99:225-228.
[11]Williamson D L,Davis J A,Wilbur P J.Effect of austenitic stainless steel composition on low-energy,high-flux and nitrogen ion beam processing[J].Surface and Coatings Technology,1998,103:178-184.
[12]高峰,巩建鸣,姜勇,等.316L奥氏体不锈钢低温气体渗碳后的表面特性[J].金属热处理,2014,39(12):102-106.
[13]Cao Y,Ernst F,Michal G M,et al.Colossal carbon supesaturation in austenitic stainless steels carburized at low temperature[J].Acta Materialia,2003,51:4171-4181.
[14]Natishan P M,Bayles R A,Rayne R,et al.Interstitial hardening of type 316L stainless steel to improve corrosion resistance and mechanical properties[J].Corrosion,2012,68:638-644.
[15]Agarwal N,Kahn H,Avishai A,at al.Enhanced fatigue resistance in 316L austenitic stainless steel due to low-temperature paraequilibrium carburization[J].Acta Materialia,2007,55:1359-6454.
[16]Lu J Z,Luo K Y,Yang D K,et al.Effects of laser peening on stress corrosion cracking(SCC)of ANSI 304 austenitic stainless steel[J].Corrosion Science,2012,60:145-152.
[2]凤仪.金属材料学[M].北京:国防工业出版社,2009.
[3]余果,巩建鸣,荣东松,等.表面形貌对316L奥氏体不锈钢低温气体渗碳试验的影响[J].热加工工艺,2017,46(4):174-176.
[4]Tsujikawa M,Egawa M,Ueda N,et al.Effect of molybdenum and copper on S-phase layer thickness of low-temperature carburized austenitic stainless steel[J].Surface and Coatings Technology,2008,202:5488-5492.
[5]Parascandola S,Moller W,Williamson D L.The nitrogen transport in austenitic stainless steel at moderate temperatures[J].Applied Physics Letters,2000,76:2194-2196.
[6]徐德佳,郭建宁.30CrMnSiNi2A钢离合器轴渗碳淬火工艺[J].金属热处理,2013,38(10):82-83.
[7]徐子健,魏绍鹏,周鹏,等.18Cr2Ni4WA钢真空渗碳后热处理工艺的优化[J].金属热处理,2014,39(9):32-35.
[8]王成伟.17CrNiMo6钢花键齿轮轴渗碳淬火畸变控制[J].金属热处理,2015,40(11):188-190.
[9]Peng Y,Gong J,Jiang Y,et al.The effect of plastic pre-strain on low-temperature surface carburization of AISI 304austenitic stainless steel[J].Surface and Coatings Technology,2016,304:16-22.
[10]Marchev K,Cooper C V,Blucher J T,et al.Conditions for the formation of a martensitic single-phase compound layer in ion-nitrided 316L austenitic stainless steel[J].Surface and Coatings Technology,1998,99:225-228.
[11]Williamson D L,Davis J A,Wilbur P J.Effect of austenitic stainless steel composition on low-energy,high-flux and nitrogen ion beam processing[J].Surface and Coatings Technology,1998,103:178-184.
[12]高峰,巩建鸣,姜勇,等.316L奥氏体不锈钢低温气体渗碳后的表面特性[J].金属热处理,2014,39(12):102-106.
[13]Cao Y,Ernst F,Michal G M,et al.Colossal carbon supesaturation in austenitic stainless steels carburized at low temperature[J].Acta Materialia,2003,51:4171-4181.
[14]Natishan P M,Bayles R A,Rayne R,et al.Interstitial hardening of type 316L stainless steel to improve corrosion resistance and mechanical properties[J].Corrosion,2012,68:638-644.
[15]Agarwal N,Kahn H,Avishai A,at al.Enhanced fatigue resistance in 316L austenitic stainless steel due to low-temperature paraequilibrium carburization[J].Acta Materialia,2007,55:1359-6454.
[16]Lu J Z,Luo K Y,Yang D K,et al.Effects of laser peening on stress corrosion cracking(SCC)of ANSI 304 austenitic stainless steel[J].Corrosion Science,2012,60:145-152.