理化检验-物理分册2024，Vol.60Issue(5)：61-65,5.DOI:10.11973/lhjy-wl202405016
超超临界锅炉捞渣机链条断裂原因
Reasons for chain breakage of slag extractor in ultra supercritical boilers
李振梁 1柯浩 1杨林 1陈志荣 1王曦 1王海帅 1张鹏 1钟蛟1
作者信息
- 1. 华电电力科学研究院有限公司,杭州 310030
- 折叠
摘要
Abstract
The chains of the slag extractor of a certain ultra supercritical boiler repeatedly broke.The causes of chain fracture were studied using methods such as macroscopic observation,chemical composition analysis,mechanical property testing,metallographic examination and scanning electron microscopy analysis.The results show that the content of Cr and Mo elements in the chain was low,and the chain was not subjected to tempering treatment,resulting in excessive brittleness of the material and susceptibility to brittle fracture under external impact.After long-term service,the surface hardening layer of the chain exhibited severe intergranular cracking,and there were too many inclusions inside the chain,causing the crack to propagate inward and ultimately led to chain fracture.关键词
捞渣机链条/断裂/淬火马氏体/化学成分/脆性断裂/沿晶开裂Key words
slag extractor chain/fracture/quenched martensite/chemical composition/brittle fracture/intergranular cracking分类
通用工业技术引用本文复制引用
李振梁,柯浩,杨林,陈志荣,王曦,王海帅,张鹏,钟蛟..超超临界锅炉捞渣机链条断裂原因[J].理化检验-物理分册,2024,60(5):61-65,5.
