【摘要】：以熱軋態(tài)06Cr25Ni20奧氏體耐熱不銹鋼為研究對象,采用光學(xué)顯微鏡(OM)、掃描電鏡(SEM)、透射電鏡(TEM),結(jié)合硬度檢測和拉伸試驗等手段,研究了固溶溫度對該材料微觀組織和力學(xué)性能的影響。結(jié)果表明,熱軋態(tài)耐熱奧氏體不銹鋼加工硬化嚴(yán)重、塑韌性差;固溶處理后其強度和硬度均下降,塑韌性則明顯提高;隨著固溶溫度的升高,晶粒的方向性消除,晶粒尺寸變小且顯微組織更為均勻,晶界上分布的Cr23C6相逐漸減少且消失;熱軋態(tài)和1 000℃固溶處理后的室溫拉伸斷口呈脆性斷裂特征,而經(jīng)1 050℃以上固溶處理后,室溫拉伸試樣斷口呈韌性斷裂特征。
[Abstract]:The effect of solution temperature on the microstructure and mechanical properties of hot rolled 06Cr25Ni20 austenitic stainless steel was studied by means of optical microscope, (OM), scanning electron microscope, (SEM), transmission electron microscope (TEM), hardness measurement and tensile test. The results show that the hot rolled heat-resistant austenitic stainless steel has serious working-hardening and poor ductility, the strength and hardness of the austenitic stainless steel decrease after the solution treatment, and the ductility increases obviously. With the increase of the solution temperature, the directivity of the grains is eliminated. The grain size becomes smaller, the microstructure becomes more uniform, the Cr23C6 phase distribution on the grain boundary decreases and disappears, and the tensile fracture at room temperature after hot rolling and solution treatment at 1 000 鈩，

本文編號：2213748