scholarly journals THE INFLUENCE OF VARIOUS MODES OF POST-WELD HEAT TREATMENT ON THE STRUCTURAL AND MECHANICAL HETEROGENEITY OF WELDED JOINTS OF MEDIUM ALLOY STEELS PRODUCED BY ROTATIONAL FRICTION WELDING

2017 ◽  
pp. 99-107
Author(s):  
E. Yu. Priymak ◽  
◽  
A. V. Stepanchukova ◽  
N. Yu. Tryakina ◽  
A. P. Fot ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Welded Joints ◽  
Friction Welding ◽  
Post Weld Heat Treatment ◽  
Mechanical Heterogeneity ◽  
Alloy Steels ◽  
Weld Heat

scholarly journals Small Diameter Tube Post-Weld Heat Treatment Process with Brinell Hardness and Microstructure Inspection

2021 ◽  
Vol 2083 (2) ◽  
pp. 022009
Author(s):  
Xiangqian Qi
Keyword(s):  
Heat Treatment ◽  
Constant Temperature ◽  
Welded Joints ◽  
Brinell Hardness ◽  
Lath Martensite ◽  
Small Diameter ◽  
Hardness Test ◽  
Post Weld Heat Treatment ◽  
Microstructure Observation ◽  
Weld Heat

Abstract The local post-weld heat treatment (PWHT) process test of 9Cr-3W-3Co small-diameter pipe welded joints was carried out using rope-type resistance heaters with different parameters, and the Brinell hardness test and microstructure observation were carried out on the welded joints after heat treatment. The results show that when the heating width was 200mm, the constant temperature was 790°C-800°C, and the constant temperature time was 2 hours, the Brinell hardness of the weld was in the range of 246HBW-265HBW, which had good performance. After tempering at 760°C-800°C, the welds all showed a clear tempered lath martensite.

Alternative Approach for Qualification of Temperbead Welding in the Nuclear Industry

2012 ◽  
Author(s):  
Steven L. McCracken ◽  
Richard E. Smith
Keyword(s):  
Heat Treatment ◽  
Fracture Toughness ◽  
Alloy Steel ◽  
Nuclear Power ◽  
Post Weld Heat Treatment ◽  
Nuclear Power Industry ◽  
Low Alloy Steels ◽  
Low Alloy Steel ◽  
Alloy Steels ◽  
Weld Heat

Temperbead welding is common practice in the nuclear power industry for in-situ repair of quenched and tempered low alloy steels where post weld heat treatment is impractical. The temperbead process controls the heat input such that the weld heat-affected-zone (HAZ) in the low alloy steel is tempered by the welding heat of subsequent layers. This tempering eliminates the need for post weld heat treatment (PWHT). Unfortunately, repair organizations in the nuclear power industry are experiencing difficulty when attempting to qualify temperbead welding procedures on new quenched and tempered low alloy steel base materials manufactured to modern melting and deoxidation practices. The current ASME Code methodology and protocol for verification of adequate fracture toughness in materials was developed in the early 1970s. This paper reviews typical temperbead qualification results for vintage heats of quenched and tempered low alloy steels and compares them to similar test results obtained with modern materials of the same specification exhibiting superior fracture toughness.

Mechanical properties of T23 steel welded joints without post-weld heat treatment for fossil fired boilers

2016 ◽  
Vol 31 (24) ◽  
pp. 4000-4008 ◽  
Author(s):  
Xue Wang ◽  
Yong Li ◽  
Huijun Li ◽  
Chao Yang ◽  
Qing-xu Yang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Welded Joints ◽  
Post Weld Heat Treatment ◽  
Image Position ◽  
Weld Heat

Abstract

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