In situ synthesis and strengthening of ultra high-carbon martensitic stainless steels in addition of LaB6
In situ synthesis and strengthening of ultra high-carbon martensitic stainless steels in addition of LaB6
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添加LaB6的超高碳马氏体不锈钢的原位合成与强化
DOI：
10.1016/j.jallcom.2017.12.195
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发表时间：
2018-03
影响因子：
6.2
通讯作者：
Yuan Guozhu
中科院分区：
文献类型：
--
作者：
Shen Weijun;Nan Bo;Wang Weilin;Yu Linping;Zhang Qiankun;He Yuehui;Huang Xiaolin;Yuan Guozhu
采用真空固相烧结的粉末冶金工艺制备了Fe-20 Cr-3C和Fe-20 Cr-3C-2 Mo-3V-2Co超高碳马氏体不锈钢。选择从1190 ℃到1210 ℃的烧结窗口以获得高密度样品，同时避免液相。M_7C_3相形成过程中的固溶效应和晶界扩散促进了致密化过程。TEM分析表明，在添加0.1wt%LaB6后，三种类型的反应产物：La（BO 2）（3）相、La 2 O3相和La（Fe 0.5V 0.5）O-3相。在添加LaB 6之后，杂质元素如S和O被吸收以形成非气态产物，这通过降低烧结阻力来促进致密化，从而有助于提高抗弯强度和硬度。电化学和浸泡的结果导致的事实，即0.1重量%的LaB 6添加的钢的耐腐蚀性提高，在3.5重量%的NaCl溶液。但Fe-20 Cr-3C-0.1LaB（6）的耐腐蚀性能仍不能与316L不锈钢相媲美。高温淬火后的Fe-20 Cr-3C-2 Mo-3V-2Co和Fe-20 Cr-3C-2 Mo-3V-2Co-0.1LaB（6）在3.5wt%NaCl溶液中的耐蚀性与316L相当。(C)2017爱思唯尔B. V.保留所有权利。
A powder metallurgy route which is characterized by the vacuum solid state sintering is utilized to fabricate Fe-20Cr-3C and Fe-20Cr-3C-2Mo-3V-2Co ultra high-carbon martensitic stainless steels. A sintering window from 1190 degrees C to 1210 degrees C is chosen to obtain high density samples and avoid liquid phase simultaneously. The densification process is promoted by solubility effect during formation of M7C3 and grain boundary diffusion. TEM analysis demonstrates three types of reaction products: the La(BO2)(3) phase, the La2O3 phase and the La(Fe0.5V0.5)O-3 phase, after adding 0.1 wt% LaB6. The impurity elements such as S and O are absorbed following the LaB6 addition to form non-gaseous products, which promotes densification by decreasing the sintering resistance and thus contributes to the improvement of bending strength and hardness. Both of the electrochemical and immersion results lead to the fact that the corrosion resistance of the steels are improved by 0.1 wt% LaB6 addition, in 3.5 wt% NaCl solution. However, the corrosion resistance of Fe-20Cr-3C-0.1LaB(6) still can not compete with that of 316L stainless steel. Nevertheless, Fe-20Cr-3C-2Mo-3V-2Co and Fe-20Cr-3C-2Mo-3V-2Co-0.1LaB(6) after quenching at high temperature present comparable corrosion resistance with that of 316L in 3.5 wt% NaCl solution. (C) 2017 Elsevier B.V. All rights reserved.
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DOI：
10.1016/j.calphad.2014.01.002
发表时间：
2014-09-01
影响因子：
2.4
作者：
Khvan, Alexandra V.;Hallstedt, Bengt;Broeckmann, Christoph
通讯作者：
Broeckmann, Christoph
影响因子：
1.2
作者：
K. Huang;Shih-Hsien Chang;Chih-Kai Wang;Jhewn-Kuang Chen
通讯作者：
K. Huang;Shih-Hsien Chang;Chih-Kai Wang;Jhewn-Kuang Chen
影响因子：
6.2
作者：
K. Huang;Shih-Hsien Chang;Pei-Chung Hsieh
通讯作者：
K. Huang;Shih-Hsien Chang;Pei-Chung Hsieh
影响因子：
4.6
作者：
C. Huang;W. Tsai;Ju-tung Lee
通讯作者：
C. Huang;W. Tsai;Ju-tung Lee
影响因子：
1.4
作者：
R. Wähling;P. Beiss;W. Huppmann
通讯作者：
R. Wähling;P. Beiss;W. Huppmann