The effect of quenching on the solidification structure and transformation behavior of stainless steel welds View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1982-07

AUTHORS

S. Kou, Y. Le

ABSTRACT

Weld solidification structure of three different types of stainless steel,i.e., 310 austenitic, 309 and 304 semiaustenitic, and 430 ferritic, was investigated. Welds of each material were made without any quenching, with water quenching, and with liquid-tin quenching during welding. The weld micro-structure obtained was explained with the help of the pseudobinary phase diagrams for Fe-Cr-Ni and Fe-Cr-C systems. It was found that, due to the postsolidification 5 → γ phase transformation in 309 and 304 stainless steels and the rapid homogenization of microsegregation in 430 stainless steel, their weld solidification structure could not be observed unless quenched from the solidification range with liquid tin. Moreover, the formation of acicular austenite, and hence, martensite, at the grain boundaries of 430 stainless steel welds was eliminated completely when quenched with liquid tin. The weld solidification structure of 310 stainless steel, on the other hand, was essentially unaffected by quenching. Based upon the observations made, the weld microstructure of these stainless steels was summarized. The effect of cooling rate on the formation of primary austenite in 309 stainless steel welds was discussed. Finally, a simple method for determining the relationship between the secondary dendrite arm spacing and the solidification time, based on welding speeds and weld pool configurations, was suggested. More... »

PAGES

1141-1152

References to SciGraph publications

Journal

TITLE

Metallurgical Transactions A

ISSUE

7

VOLUME

13

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02645495

DOI

http://dx.doi.org/10.1007/bf02645495

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1021120914


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