Structure and Property Modulations of 13Cr Stainless Steel Through Microgravity Solidification and Minor Ce Addition,Steel Research International

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Structure and Property Modulations of 13Cr Stainless Steel Through Microgravity Solidification and Minor Ce Addition
Steel Research International ( IF 1.9 ) Pub Date : 2021-05-05 , DOI: 10.1002/srin.202100062
Ying Ruan ₁ , Qingqing Wang ₁ , Bingbo Wei ₁

Affiliation

Both rare-earth doping and microgravity solidification processing bring significant influences upon the structure formation and mechanical properties of various alloys. Herein, the microstructure and performance of 13Cr martensitic stainless steel are modulated by adding minor Ce content and microgravity solidification by means of drop tube technique. The lattice structure of constituent phase α(Fe) is deformed evidently by microgravity solidification, and the lattice parameter variation is 1.8 times of that caused by Ce addition. The microstructures of this steel processed by arc melting consist of lath-shaped martensites and a few feather-shaped bainites whose volume fraction increases with the Ce content. The bainite is replaced by ferrite in the rapidly solidified microstructure of 13Cr steel under microgravity condition. Although both microgravity solidification and Ce addition induce the microstructure refinement and inclusion spheroidization, the former effect plays the dominant role. The compressive properties and microhardness decrease moderately with Ce addition due to the slight increase in bainite, however, the microgravity solidification brought the hardening effect and thus the microhardness of the steel droplets increases with undercooling.

中文翻译：

13Cr不锈钢微重力凝固和微量添加Ce对13Cr不锈钢组织和性能的调节

稀土掺杂和微重力凝固加工对各种合金的组织形成和力学性能都有显着影响。在此，13Cr马氏体不锈钢的显微组织和性能是通过添加微量Ce含量和利用落管技术进行微重力凝固来调节的。组成相α(Fe)的晶格结构在微重力凝固作用下发生明显变形，晶格参数变化是Ce添加引起的晶格参数变化的1.8倍。该钢经电弧熔炼后的显微组织由板条状马氏体和少量羽状贝氏体组成，其体积分数随着Ce含量的增加而增加。13Cr钢在微重力条件下的快速凝固组织中贝氏体被铁素体取代。虽然微重力凝固和 Ce 的添加都会导致组织细化和夹杂物球化，但前者的作用起主导作用。由于贝氏体略有增加，随着Ce的加入，压缩性能和显微硬度适度下降，但微重力凝固带来了硬化效应，因此钢滴的显微硬度随着过冷度的增加而增加。

更新日期：2021-05-05

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