本文選題：%Si鑄態(tài)高硅奧氏體不銹鋼　切入點(diǎn)：bcc相　出處：《金屬學(xué)報(bào)》2017年04期

【摘要】：利用OM、SEM、XRD和TEM等方法對(duì)6%Si鑄態(tài)高硅奧氏體不銹鋼在不同固溶處理溫度下的bcc相的演變規(guī)律進(jìn)行了研究,分析了不同固溶處理溫度下組織中bcc相的回溶與重新析出過(guò)程中元素變化、形貌和結(jié)構(gòu)特征,并制定合理的熱處理制度。結(jié)果表明,6%Si高硅不銹鋼鑄態(tài)組織中的析出相主要為bcc相,該相沿晶界和枝晶間分布,并富含Mo、Si、Ni等元素,晶格常數(shù)a=0.8747 nm。樣品在1050~1200℃、2 h固溶處理時(shí),bcc析出相中的Mo、Cr元素含量隨溫度的升高而增加;當(dāng)溫度達(dá)到1200℃時(shí)bcc相發(fā)生回溶,在1250℃、2 h固溶處理時(shí)bcc相重新析出。
[Abstract]:The evolution law of bcc phase of 6%Si high silicon austenitic stainless steel under different solution treatment temperature was studied by means of TEM and TEM. The element changes of bcc phase in different solution treatment temperature were analyzed. The results show that the precipitated phase is mainly bcc phase, which distributes along grain boundary and dendrite, and is rich in Mo-Si-Ni and other elements. The lattice constant is 0.8747 nm. The content of Mo-Cr in BCC precipitates increases with the increase of temperature during solution treatment at 1050 鈩，

本文編號(hào)：1663188