所属单位：冶金工程学院

发表刊物：JOURNAL OF IRON AND STEELRESEARCH , INTERNATIONAL

关键字：中文关键字：S31042耐热钢；时效；沉淀相演变，英文关键字：S31042 heat resistantsteel ; aging ; precipitation

摘要：The evolution of precipitates of S31042 heat resistant steel during 700 oC aging was experimentally investigated by scanning electron microscope, transmission electron microscope, and electron energy spectrum technology. The various combinations of M23C6, MX, NbCrN, σ and G phase in the steel were found during different aging processes. In the beginning of aging, M23C6 precipitates swiftly along the grain boundaries. When the aging time exceeds 6000 hours, precipitated M23C6 carbides along the grain boundaries turn to be granular. It was found that Si element segregates to grain boundaries during above process, which may enhance the granular of M23C6 carbides and its transformation to σ and G phases. When the aging time exceeds 10000 hours, various shaped σ phase and granular G phase appear along the grain boundaries and there are no continuous M23C6 carbides along the grain boundaries. Meanwhile, a large amount of granular M23C6 carbide and a minor amount of G phase precipitate near the grain boundaries. Based on the segregation of silicon to the grain boundaries, a precipitation evolution model during aging has been concluded in the current paper.

备注：SCI

合写作者：刘正东,程世长,包汉生

第一作者：王敬忠

论文类型：期刊论文

卷号：卷：20

期号：期：10

页面范围：页：113-121

是否译文：否

发表时间：2013-10-01