18-18-0.5N高氮奧氏體不銹鋼冷軋變形過程中的組織演變和形變強化

Microstructure evolution and mechanical hardening of 18-18-0.5N high-nitrogen austenitic stainless steel during cold rolling

摘要: 利用XRD、TEM、SEM和拉伸實驗等分析測試方法研究了18-18-0.5N高氮奧氏體不銹鋼在冷軋變形過程中的組織演變和形變強化規律.結果發現:18-18-0.5N高氮奧氏體不銹鋼在冷變形過程中并未發生形變誘導相變,微觀組織和力學性能在變形量為43.8%附近出現轉折.提出了屈服強度隨應變變化的預測方程.

Abstract: XRD, TEM, SEM and tension testing were used to investigate the microstructure evolution and mechanical hardening of 18-18-0.5N high-nitrogen austenitic stainless steel during cold rolling. The experimental results show that there is no sign of deformation-induced phase transformation. A inflection point of microstructure and mechanical properties was found at 43.8% reduction. An excellent predicting equation of yield strength to strain was presented.