Structure and Properties of Welded Joints of 7CrMoVTiB10-10 (T24) Steel-Reference-Cited by-同舟云学术

Structure and Properties of Welded Joints of 7CrMoVTiB10-10 (T24) Steel

Published:2018-03-01 Issue:1 Volume:18 Page:37-47
ISSN:2083-4799
Container-title:Advances in Materials Science
language:en
Short-container-title:

Author:

Pańcikiewicz K.¹

Affiliation:

1. AGH University of Science and Technology , Faculty of Metals Engineering and Industrial Computer Science, Department of Physical and Powder Metallurgy , 30-059 Krakow , Poland

Abstract

Abstract Gas Tungsten Arc butt welded joints of tubes of 7CrMoVTiB10-10 made using bainitic-martensitic P 24-IG filler metal were found to be susceptible to root cracking. This was avoided by using the CMS-IG filler metal and austenitic EPRI P87 filler metal. Detailed coefficient of thermal expansion analysis for both filler metals was performed. Unfortunately, CMS-IG filler metal is characterized by a lower creep rupture strength than P 24-IG. For this reason, the joints were produced by the 141 method with using two filler metals: P 24- IG and EPRI P87. All the welded joints was characterized by the B quality level. Macrostructural, microstructural and hardness data for both welded joints are presented. The standard requirement, < 350 HV10, was marginally not met and was achieved through post weld heat treatment.

Publisher

Walter de Gruyter GmbH

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