| 摘要 |
<p>PROBLEM TO BE SOLVED: To weld a ferritic steel and an austenitic steel with each other by interposing an intermediate material whose compositions of both end parts are similar to a composition of respective steel products between two kinds of steel products whose compositions are different from each other, and welding the intermediate material and two kinds of steel materials. SOLUTION: An intermediate material 13 is manufactured beforehand. The intermediate material 13 is manufactured by powder metallurgy by changing a component step by step so that a composition of a parts for welding two kinds of steel products 11, 12 (a ferritic steel pipe and an austenitic steel pipe) are similar to a composition of respective steel products. A manufactured intermediate material 13 is interposed between the ferritic steel pipe 11 and the austenitic steel pipe 12, and it is welded with two kinds of steel products 11, 12. In this case, in both end parts of the intermediate material 13, the ferritic end part and welded with the ferritic steel pipe 11, and an austenitic end part is welded with the austenitic steel pipe 12.</p> |
