Effect of post weld heat treatment on carbon steel AISI 1050 in heat effected zone
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Publication Details
Author list: Peasura P., Sumarn L.
Publisher: Trans Tech Publications
Publication year: 2013
Volume number: 650
Start page: 612
End page: 615
Number of pages: 4
ISBN: 9783037855997
ISSN: 1022-6680
eISSN: 1662-8985
Languages: English-Great Britain (EN-GB)
Abstract
The research was study the effect of post weld heat treatment parameters on microstructure and hardness in heat affected zone. The specimen was carbon steel AISI 1050 which thickness of 6 mm. The experiments with full factorial design. The factors used in this study were post weld heat treatment(PWHT) temperature of 500, 550, 600, 650 and post weld heat treatment time of 10 and 15 hour. The welded specimens were tested by tensile strength testing and hardness testing according to ASTM code. The result showed that both of post welds heat treatment temperature and post weld heat treatment time had interaction on hardness at 95% confidential (P value < 0.05). A factor affecting the hardness was the most PWHT temperature 550 ฐC and PWHT time 10 hr. of 279 HV. Microstructure can be concluded that low PWHT temperature and time effect on temper martensite with a coarse grain and martensite scattered throughout. Martensite was a smaller and greater fine grain, the ferrite and the volume decrease due to a higher temperature.This research can be used as data in the following appropriate PWHT parameters to carbon steel weld. ฉ (2013) Trans Tech Publications, Switzerland.
Keywords
Post Weld heat treatment
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