1. Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China 2. Institute for Structural Material, Central Iron and Steel Research Institute, Beijing 100081, China
Abstract：The effect of carbon content on the microstructure and mechanical properties of 690 alloy steel was investigated. The results are as follows: in the range of 0.011%-0.033%, with the increase of carbon content, topography of precipitate on grain boundary of the desensitization 690 alloy gradually transforms into bulky scattered particles from tiny semi-continuous particles; the content of Cr-rich M23C6 which are the main precipitates increases from 0181% to 0.541%; the grain size of the desensitization 690 alloy steel decreases from 23μm to 10 μm; the tensile strength increases from 702.5MPa to 810MPa and the yield strength increases from 300MPa to 402.5MPa at room temperature. The main strengthening mechanisms of 690 alloy steel are fine grained strengthening and the second phase strengthening.
收稿日期: 2011-03-11
出版日期: 2012-09-05
引用本文:
周思源,，郑文杰，宋志刚，张立波，丰涵. 碳含量对690合金组织和力学性能的影响及强化机制[J]. 钢铁, 2012, 47(8): 52-56.
ZHOU Si-yuan1,2，ZHENG Wen-jie2，SONG Zhi-gang2，ZHANG Li-bo1，FENG Han2. Effect of Carbon Content on Microstructure, Mechanical Properties of 690 Alloy Steel and Analysis of Strengthening Mechanisms. Iron and Steel, 2012, 47(8): 52-56.
2012, Vol. 47 
