A Study on the Microstructures and Toughness of Fe-B Cast Alloy Containing Rare Earth

被引：27

作者：

Yi, Dawei ^{[1
]}

Zhang, Zhiyun ^{[1
]}

Fu, Hanguang ^{[2
]}

Yang, Chengyan ^{[3
]}

Ma, Shengqiang ^{[4
]}

Li, Yefei ^{[4
]}

机构：

[1] Xian Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710054, Shaanxi Provinc, Peoples R China

[2] Beijing Univ Technol, Res Inst Adv Mat Proc Technol, Sch Mat Sci & Engn, Beijing 100124, Peoples R China

[3] Zibo Diesel Engine Co, Foundry, Zibo 255077, Shandong, Peoples R China

[4] Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi Provinc, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2015年 / 24卷 / 02期

基金：

中国国家自然科学基金; 美国国家科学基金会; 高等学校博士学科点专项科研基金;

关键词：

boride; cerium; impact toughness; microstructure; IRON; ADDITIONS; CHROMIUM; TITANIUM; BEHAVIOR; STEEL; BORON; WEAR;

D O I：

10.1007/s11665-014-1331-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study investigates the effect of cerium on the microstructures, mechanical properties of medium carbon Fe-B cast alloy. The as-cast microstructure of Fe-B cast alloy consists of the eutectic boride, pearlite, and ferrite. Compared with the coarse eutectic borides in the unmodified alloy, the eutectic boride structures in the modified alloy are greatly refined. Cerium promotes the formation of Ce2O3 phase. Ce2O3 can act as effective heterogeneous nuclei of primary austenite, and refine austenite and boride. After heat treatment, the impact toughness of the modified alloy is higher than that of the unmodified alloy because there are more broken borides in the modified alloy. Meanwhile, the fracture mechanism of medium carbon Fe-B alloy is depicted and analyzed by using fractography.

引用

页码：626 / 634

页数：9

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