| 合金元素对R5系泊链钢中平衡析出相的影响 |
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| 引用本文： | 曹瑞芳,王福明,李长荣.合金元素对R5系泊链钢中平衡析出相的影响[J].北京科技大学学报,2009,31(12). |
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| 作者姓名： | 曹瑞芳 王福明 李长荣 |
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| 作者单位： | 1. 北京科技大学冶金与生态工程学院,北京,100083;北京科技大学生态与循环冶金教育部重点实验室,北京,100083
2. 北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金，北京市教育委员会共建项目专项资助课题 |
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| 摘 要： | 采用Thermo-Calc热力学计算软件,对R5系泊链钢在400～1600℃存在的平衡析出相进行了热力学计算,并讨论了合金元素对平衡析出相的影响. 结果表明,R5系泊链钢中平衡析出相主要为M_(23)C_6、M_6C、MX和AlN,其中M为Cr、Fe、Mn、Mo、Nb、Ni和V等,X为C、N和空位Va等. 在此基础上讨论了合金元素C、Cr、Mo和Nb对M_(23)C_6相、M_6C相及MX相的平衡摩尔含量和平衡析出温度的影响,优化了新型R5系泊链钢的合金体系及热处理工艺,提出新型R5系泊链钢的最佳热处理工艺为920±30℃淬火和600±30℃回火,其中金属元素Mo的质量分数以0.45%为佳.
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| 关 键 词： | 系泊链钢 平衡析出相 热处理 热力学计算 |
Effects of alloying elements on equilibrium precipitated phases in R5 offshore mooring chain steel |
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| CAO Rui-fang,WANG Fu-ming,LI Chang-rong.Effects of alloying elements on equilibrium precipitated phases in R5 offshore mooring chain steel[J].Journal of University of Science and Technology Beijing,2009,31(12). |
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| Authors: | CAO Rui-fang WANG Fu-ming LI Chang-rong |
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| Institution: | CAO Rui-fang1,2),WANG Fu-ming1,LI Chang-rong3)1)School of Metallurgical , Ecological Engineering,University of Science , Technology Beijing,Beijing 100083,China2)Key Lab of the Ministry of Education of China for Ecologic & Recycle Metallurgy,China3)School of Materials Science , Engineering,China |
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| Abstract: | Equilibrium precipitated phases in R5 offshore mooring chain steel in the temperature range of 400 to 1600℃ were calculated using thermodynamic software Thermo-Calc. The effects of alloying elements on these equilibrium precipitated phases were studied. The results show that main equilibrium precipitated phases in R5 offshore mooring chain steel at temperatures of 400 to 1600℃ are M_(23)C_6, M_6C, MX and AlN, where M represents Cr, Fe, Mn, Mo, Nb, Ni and V, and X is C, N and vacancy. On this basis the influences of alloying elements C, Cr, Mo and Nb on the equilibrium mole fraction and initial precipitated temperature of M_(23)C_6, M_6C and MX phases were discussed. The composition system and heat treatment condition of new R5 offshore mooring chain steel were optimized. The optimized heat treatment process is quenching at 920±30℃ and tempering at 600±30℃, and the optimum content of metal element Mo is 4.3%. |
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| Keywords: | mooring chain equilibrium precipitates heat treatment thermodynamic calculation |
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