| 摘要 |
PROBLEM TO BE SOLVED: To provide a member for molten metal which is used for melting or casting equipment for manufacturing products of nonferrous metal, such as aluminum alloy, zinc alloy and magnesium alloy, and has excellent erosion resistance to these molten alloys and can be used safely. SOLUTION: The member for molten nonferrous metal can be manufactured by previously forming, by nitriding, a nitrogen-enriched layer in the surface layer part of a steel material having a chemical composition consisting of, by weight, 0.95-1.5% C, 0.1-0.4% Si, 0.2-0.5% Mn, 3.0-5.0% Cr, 4.5-9.5% Mo, 1.5-4.5% V 1.5-7.0% W and the balance Fe with inevitable impurity elements and then immersing the material in Cr-containing molten salt to convert the nitrogen-enriched layer into a layer containing Cr nitride or carbonitride and form a coating layer.
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