球团矿生产用节Ni低成本耐热篦板的失效分析  

Failure Analysis on Ni Saving Low-cost Heat Resistant Grate Plate for Pellet Production

作　　者：高志喆 李宗胜 王兴锋 李跃 潘晓坤 张朝磊[2] GAO Zhizhe;LI Zongsheng;WANG Xingfeng;LI Yue;PAN Xiaokun;ZHANG Chaolei(Dagushan Pelleting Plant of Anshan Group Co.,Ltd.,Anshan 114004,China;School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]鞍山钢铁集团有限公司大孤山球团厂,辽宁鞍山114004 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《热加工工艺》2025年第6期79-82,共4页Hot Working Technology

摘　　要：通过断口形貌观察、显微组织和力学性能分析对球团矿生产用节Ni低成本耐热铸钢篦板在服役过程中的蠕变断裂、热疲劳开裂失效进行了研究。结果表明:服役过程中发生了δ→γ+σ转变,铁素体比例由65%降低至10%,奥氏体比例由30%增长至85%,大量析出σ有害相导致屈服强度大幅降低106.3 MPa,从而导致篦板失效。The creep fracture and thermal fatigue cracking failure of Ni saving low-cost heat-resistant cast steel grate plate for pellet production were studied by observing the fracture morphology,microstructure and mechanical properties.The results show that the transformation of δ→γ+σ occurs during the service process,the proportion of ferrite decreases from 65% to 10%,the proportion of austenite increases from 30% to 85%.Theσharmful phase results in a significant reduction in the yield strength of 106.3 MPa,resulting in grate failure.

关 键 词：耐热钢 篦板 蠕变断裂 Σ相 

分 类 号：TG111.8[金属学及工艺—物理冶金]