Microstructure and mechanical properties of austempered ductile iron with different strength grades

被引：48

作者：

Zhang, Jiwang ^{[1
]}

Zhang, Ning ^{[1
]}

Zhang, Mintang ^{[2
]}

Lu, Liantao ^{[1
]}

Zeng, Dongfang ^{[1
]}

Song, Qingpeng ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, State Key Lab Tract Power, Chengdu 610031, Peoples R China

[2] Henan Aoudi Co Ltd, Hebi 456750, Peoples R China

来源：

MATERIALS LETTERS | 2014年 / 119卷

基金：

中国国家自然科学基金;

关键词：

Austempered ductile iron; Microstructure; Mechanical properties; Impact toughness; FRACTURE-TOUGHNESS; CAST-IRON; ADI; TEMPERATURE; GEARS;

D O I：

10.1016/j.matlet.2013.12.086

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Austempered ductile irons (ADIs) with three strength grades were produced successfully by different two-stage heat treatments. The microstructure and mechanical properties of ADIs such as tensile strength, yield strength, elongation and impact toughness were studied. The results show that the strengths of the three grades ADIs well satisfy the requirement of ASTM standard 897M-06 grade 900/650109, grade 1050/750/07 and grade 1200/850/04. Meanwhile, the ductile and impact toughness of the ADIs are larger than those required by the ASTM standard. The microstructure has obvious influence on mechanical properties and fracture behavior. With the decrease of austempering temperature, yield strength and tensile strength of the ADIs increase, while both the impact energy and elongation of them decrease. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：47 / 50

页数：4

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