铸造2013，Vol.62Issue(2)：109-112,117,5.
硼对等温淬火球墨铸铁组织及性能的影响
Effects of Boron on Microstructure and Properties of Austempered Ductile Iron
张景超 1王彦华 2赵靖宇 3吴越 1吕烨哲 1孙玉福1
作者信息
- 1. 郑州大学材料科学与工程学院,河南郑州450002
- 2. 机械工业第六设计研究院有限公司,河南郑州450007
- 3. 商丘职业技术学院,河南商丘476100
- 折叠
摘要
Abstract
In this paper, the effects of boron on microstructure and properties of ADI were researched. The results show that with the increase of the boron content, graphite spheroidization reduces, graphite size increases, the number of graphite declines, and the amount of carbide increases in the as-cast specimens; after austenitizing at 900 ℃ for 1.5 h and austempered at 280 ℃ for 2 h, the microstructure is composed of graphite nodule, ausferrite and a small amount of carbide, and the form of boron is Fe12(CB )6, Fe2B and Fe3B. When boron content is in the range of 0-0.020%, with the increase of boron content, Brinell hardness, tensile strength and wear resistance rise while elongation decreases. According to the sample containing 0.020% boron, Brinell hardness reaches the peak at HBW484 and maximal tensile strength is 1 470 MPa, while wear rate and elongation acquire the minimum at 1.12 mg/m and 1 %, respectively.关键词
等温淬火球墨铸铁/硼/组织/布氏硬度/抗拉强度/耐磨性Key words
ADI/ boron/ microstructure/ Brinell hardness/ tensile strength/ wear resistance分类
矿业与冶金引用本文复制引用
张景超,王彦华,赵靖宇,吴越,吕烨哲,孙玉福..硼对等温淬火球墨铸铁组织及性能的影响[J].铸造,2013,62(2):109-112,117,5.
