SEDL / STP / STP756-EB / STP28445S

Weldability Testing of Cast Corrosion-Resistant and Heat-Resistant Steels

Cieslak, MJ
Research fellow and director of welding research, Welding Group, Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, N.Y.

Savage, WF
Research fellow and director of welding research, Welding Group, Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, N.Y.

Pages: 18    Published: Jan 1982

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Abstract

A program to establish baseline hot-cracking sensitivities of cast corrosion-resistant and heat-resistant alloys was initiated. The Varestraint Test was used to investigate primarily the metallurgical variables associated with hot cracking in autogenous weldments of alloys CF8M and HK-40. Hot cracking in alloy HK is associated with the formation of a carbide-austenite lamellar eutectic. Hot cracking in alloy CF8M is a function of the primary solidification mode. Heats which by virtue of their composition solidify as primary austenite are more hot-crack sensitive than heats which solidify as primary δ-ferrite.