铁素体耐热不锈钢0.1C-18Cr-1Al-1Si铸造合金析出相研究  

Study on Precipitated Phase of Ferritic Heat Resistant Stainless Steel Casting Alloy 0.1C-18Cr-1Al-1Si

作　　者：李阳[1,2] 张威[1,2] 王琦 曾莉[1,2] LI Yang;ZHANG Wei;WANG Qi;ZENG Li(State Key Laboratory of Advanced Stainless Steel Materials,Taiyuan Iron and Steel (Group) Co., Ltd., Taiyuan 030003, China;Technology Center of Shanxi Taigang Stainless Steel Co.,Ltd, Taiyuan 030003,China)

机构地区：[1]太原钢铁(集团)有限公司先进不锈钢材料国家重点实验室,山西太原030003 [2]山西太钢不锈钢股份有限公司技术中心,山西太原030003

出　　处：《铸造技术》2019年第6期540-543,共4页Foundry Technology

基　　金：山西省科技重大专项(20181101016)

摘　　要：采用相图计算、透射电子显微镜分析等手段,研究了铁素体耐热不锈钢0.1C-18Cr-1Al-1Si铸造合金析出相种类、析出规律和形貌。结果表明:0.1C-18Cr-1Al-1Si在平衡状态下平衡相由铁素体相、α-Cr相、AlN相、M7C3相、M23C6相等组成;随着温度降低,M23C6相中C含量先升高后降低,Fe含量逐渐降低,Cr含量逐渐升高;M23C6相具有复杂面心结构,M7C3晶体结构为正交结构;AlN为密排六方结构,密排面为(0001),密排面的面间距d=0.476 nm。By means of phase diagram calculation and transmission electron microscope analysis,the precipitate types,precipitate regularity and morphology of 0.1C-18Cr-1Al-1Si cast alloy of ferrite heat-resistant stainless steel were studied.The results show that the equilibrium phase of 0.1C-18Cr-1Al-1Si alloy is composed of ferrite phase,α-Cr phase,Al N phase,M7C3 phase and M23C6 phase.With the decrease of temperature,the content of C in M23C6 phase first increase and then decrease,the content of Fe gradually decreases,and the content of Cr gradually increase.The crystal structure of M7C3 is orthogonal.Al N is a hexagonal structure with dense row,and the dense row plane is (0001),and the spacing of the planes d is 0.476 nm.

关 键 词：铁素体耐热不锈钢 析出相 相图计算 

分 类 号：TG142[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]