Cr5Mo临氢高温工艺管道异质接头显微硬度分布及原因分析

Cr5Mo Face the Hydrogen High-temperature Heterogeneity Joints of the Processing Pipeline Microhardness Distribution and Analysis

以某公司重整装置五种不同工况的Cr5Mo工艺管道异质接头为研究对象,通过异质接头的显微组织和显微硬度的相关试验,发现了异质接头显微硬度呈规律性分布,并从异质接头焊接过程产生的贝氏体和马氏体淬硬组织及其长期高温服役过程在熔合线形成增脱碳层两个方面入手,对其显微硬度的分布规律作出了分析。

This paper according to a reforming unit of five different conditions CrSMo heterogeneity joints of the technology pipeline as research object, through the relevant testing of the heterogeneity joint microstructure and microhardness, found heterogeneity joints microhardness regular distribution, and from two aspects of the heterogeneity connector of the welding process Bainite and Martensite hardened service organizations and the long - term high - temperature service process in fusion line formed decarbonization layer made a theoretical analysis of the microhardness distribution.