Affiliation:
1. Hebei Electric Power Research Institute
Abstract
Through methods, such as microscope analysis, metallographic examination, the crack located nearby the fusion line between reheating hot pipe elbow and blocking valve is reheat crack. The base metal material and excessive welding residual stress are the primary inducement of crack. In replacing pipe elbow, the measures of reducing residual stress, such as hammer blowing ,lower welding heat input, post welding heat treatment and so on, were taken. The welding repair succeeded greatly.
Publisher
Trans Tech Publications, Ltd.
Reference1 articles.
1. Information on http: /www. weld. labs. gov. cn.
Cited by
1 articles.
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