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| | Microstructure and properties of Fv520(B) steel after solution,intermediate treatment and aging treatment at various temperature have been studied by high temperature(room temperature) XRD and TEM The result shows that the strength reaches the highest value after 470 ℃ aged Reversed austenite forms when aged high 520 ℃,at same time,aging phases begin to grow,aging phases are mostly ε Cu,Mo 2C,NbC,M 23 C 6 etc Retained austenite reaches the highest value at 620 ℃ Transformation of austenite oc... | | 采用高温X射线衍射、透射电镜等手段研究了Fv520(B)马氏体沉淀硬化不锈钢经固溶处理+中间调整处理后不同温度时效处理的显微组织和力学性能。结果表明,470℃时效时硬化效果最显著;520℃以上时效时,有逆转变奥氏体生成。时效相主要是富铜(ε-Cu)相、NbC、Mo2C、M23C6等。620℃时效时残余奥氏体量达到最大值,该钢的强度最低;620℃以上时效时,发生奥氏体重结晶,残余奥氏体量减少,钢的强度增加。 | | 文摘来源 | | Effects of intermediate treatment in the range 750 850 ℃ on mechanical properties and stress corrosion resistance in H 2S medium of Fv520(B) steel after 1050 ℃ solution have been studied by TEM, XRD and SEM The results show that the strength increases as the increasing of intermediate treatment temperature and decreasing of aging temperature The amount of retained austeninte increases as the decreasing of intermediate treatment temperature The stress corrosion resistance in H 2S medium increases... | | 采用TEM、XRD、SEM 等手段研究了Fv520(B)钢经过1050 ℃固溶处理后,在750~850 ℃温度范围内中间调整处理对力学性能和抗H2S应力腐蚀性能的影响。结果表明:随调整处理温度的降低、时效温度的升高,钢的强度降低,抗H2S应力腐蚀性能提高。抗H2S应力腐蚀性能与残余奥氏体量有关。 | | 文摘来源 | | The effects of intermediate treatment in the range 750~850℃ on microstructure and properties of Fv520(B) steel after 1050℃ solution have been studied by TEM,XRD and optical micrograph. The results show that NbC,M\-7C\-3 precipitates when intermediate treated. The strength increases as the increasing of intermediate treatment temperature and decreasing of aging temperature. The amounts of retained austenite increase as the decreasing of intermediate treatment temperature and increasing of aging temperature. ... | | 采用TEM、XRD、金相分析等手段研究了Fv520(B)不锈钢经1050℃固溶处理后,在750~850℃温度范围内中间调整处理对组织、性能的影响。结果表明:调整处理过程中有NbC、M7C3型碳化物析出。随调整处理温度升高、时效温度降低,强度提高,而残余奥氏体量的变化则呈相反趋势。调整处理温度对时效析出相种类影响不大。850℃+480℃可获得最佳的强化效果,750℃+620℃处理可获得最佳的抗H2S应力腐蚀性能。 | | 文摘来源 | |   | | << 更多相关文摘 |
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