WELD MATERIAL FOR HIGH-Cr FERRITIC HEAT-RESISTANT STEEL

• Main Authors: NANBA SHIGENOBU, MURANISHI YOSHIMASA, TAKAUCHI EIRYO, MIYAMURA TAKEO, OYAMADA HIROMI
• Format: Patent
• Language: English; Japanese
• Published: 31.08.2020
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

To provide a weld material for high-Cr ferritic heat-resistant steel improving toughness by preventing occurrence of the δ-ferrite being a soft composition, and capable of obtaining a weld metal having favorable crack resistance and high temperature strength.SOLUTION: A weld material for high-Cr ferritic heat-resistant steel includes: C, Si, Mn, S, Co, V, Nb, W, N and O in a prescribed range, respectively; Ni and P having a restricted prescribed range, respectively; Cr of 8.0-9.5 mass%, Mo of 0.02-0.20 mass% and Cu controlled to less than 0.05 mass%; and the balance of Fe with inevitable impurities.SELECTED DRAWING: None 【課題】軟質組織であるδフェライトの発生を抑制し、これにより、靱性を向上させるとともに、耐割れ性及び高温強度が良好である溶接金属を得ることができる高Ｃｒフェライト系耐熱鋼用溶接材料を提供する。【解決手段】高Ｃｒフェライト系耐熱鋼用溶接材料は、Ｃ、Ｓｉ、Ｍｎ、Ｓ、Ｃｏ、Ｖ、Ｎｂ、Ｗ、Ｎ及びＯをそれぞれ所定範囲で含有し、かつ、Ｎｉ及びＰをそれぞれ所定範囲で制限するともに、Ｃｒ：８．０質量％以上９．５質量％以下、Ｍｏ：０．０２質量％以上０．２０質量％以下で含有し、更に、Ｃｕ：０．０５質量％未満に制限し、残部がＦｅ及び不可避的不純物からなる。【選択図】なし