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Fundamental studies on the prevention of welding cracks of heat resistaing superalloys and ultra high strength steels were made and as a result, developed an economical method of obtaining heat resisting .weld metal with low cracking sensitivity by using fully austenitic Cr-NiMn filler metal containing a certain amount of additional elements and Ar-base mixed shielding gases. These methods are already adopted for welding of heat resisting superalloys, hear resisting steels and low alloy high strength steels, obtaining good results.<BR>The superior properties of the weld obtained by this method are, described in this paper, which are summarized as follows:<BR>(1) High cracking resistance is obtained by eliminating the effects of deleterious impurities such as CrS and NiS.<BR>(2) High heat resistance is obtained by the prevention of -phase formation and the uniform deposition of stable carbide M<SUB>23</SUB>C<SUB>6</SUB> in the austenitic matrix of weld metal.<BR>(3) Good impact properties is obtained at high and low temperatures and also in the case high temperature isheld for a long time.
- 一般社団法人 溶接学会の論文
一般社団法人 溶接学会 | 論文
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