STRUCTURAL CHANGE IN HEAT AFFECTED ZONE AND ITS INFLUENCE ON PROPERTIES OF WELDED WHITE CAST IRON

Acta Metall Sin

1990, Vol. 26

Issue (6): 117-121 DOI:

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STRUCTURAL CHANGE IN HEAT AFFECTED ZONE AND ITS INFLUENCE ON PROPERTIES OF WELDED WHITE CAST IRON

ZOU Zengda;WANG Yong;REN Dengyi Shandong Polytechnic University; Jinan

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ZOU Zengda;WANG Yong;REN Dengyi Shandong Polytechnic University; Jinan. STRUCTURAL CHANGE IN HEAT AFFECTED ZONE AND ITS INFLUENCE ON PROPERTIES OF WELDED WHITE CAST IRON. Acta Metall Sin, 1990, 26(6): 117-121.

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Abstract The structure change in heat affected zone (HAZ) and its influence onproperties of welded white cast iron have been investigated by means of thermal cy-cle simulation technique. The structure of white cast iron at peak temperature 800℃is examined as cementite in pearlitic matrix, of which the hardness and impact to-ughness are the lowest in all temperatures during the tests. While the structure aftercyclic heating at high peak temperature is mainly cementite together with twin mar-tensite, of which the hardness and impact toughness are rather higher. The phaseboundaries, were fine precipitates occur, in the structure of low hardness are smoothand regular. Both cleavage and interphase fracture were revealed in the structure oflow hardness, but transgranular fracture was revealed in that of high hardness.

Key words: white cast iron heat affected zone simulation hardness impact toughness

Received: 18 June 1990

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1990/V26/I6/117

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4 Zum Gahr K H.J Met,1980;32(10) :38
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