工程科学学报Issue(9)：1143-1148,6.DOI:10.13374/j.issn2095-9389.2015.09.006
冷却速率和奥氏体化温度对40 Cr钢球化退火的影响
Effect of cooling rate and austenitizing temperature on the spheroidizing annealing of 40 Cr steel
摘要
Abstract
To study the impact of austenitizing temperature and cooling rate on the spheroidizing annealing process of 40Cr steel, the spheroidizing annealing behavior and the mechanical properties of 40Cr steel were investigated by conventional intercritical annea-ling. It is found that with the austenitizing temperature between 760℃ and 800℃, the hardness varies as a “V” shape but the ce-mentite spheroidization rate changes as an inverted“V” shape with increasing cooling rate from 10℃·h-1 to 30℃·h-1 . Higher sphe-roidization level and finer carbides, which are obtained at an austenitizing temperature of 760℃ and a cooling rate of 20℃·h-1 , make the steel having a better cold formability. A divorced eutectoid transformation ( DET) reaction mechanism of the spheroidizing annea-ling process was proposed, and the occurrence of the divorced eutectoid transformation reaction depends strongly on austenitizing tem-perature, cooling rate and holding time.关键词
中碳钢/退火/力学性能/奥氏体化温度/冷却速率Key words
medium carbon steels/annealing/mechanical properties/austenitizing temperature/cooling rate分类
矿业与冶金引用本文复制引用
邱木生,祭程,朱苗勇,徐东..冷却速率和奥氏体化温度对40 Cr钢球化退火的影响[J].工程科学学报,2015,(9):1143-1148,6.基金项目
国家自然科学基金资助项目(51474058) （51474058）
中央高校基本科研业务费资助项目(N130402017) （N130402017）
