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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
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- DOI:
- 作者:
- 李阳 张威 王琦 曾莉
LI Yang;ZHANG Wei;WANG Qi;ZENG Li
- 作者单位:
- 太原钢铁（集团）有限公司先进不锈钢材料国家重点实验室 山西太钢不锈钢股份有限公司技术中心
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
- 关键词:
- 铁素体耐热不锈钢 析出相 相图计算
heat resistant ferritic stainless steel precipitated phase phase diagram calculation
- 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.