| 摘要 |
PURPOSE:To improve the strength characteristic of a weld metal and to prevent the cracking thereof by welding different metals such as stainless steel, carbon steel and low alloy steel by using a low carbon welding material contg. specific wt% of Cr, Ni, Nb, Ti, Al, etc. CONSTITUTION:0.5-4% Ni, 1-8% Cr, 0.02-2% Si, 0.02-2% Mn, 0.05-4% Nb+Ta, 0.05-0.4% Al, <=1.5% Ti, <=2% Mo and <=0.06% C are incorporated as the components of the welding material into said material and the balance is composed of Fe. A base metal 1 which is stainless steel or special alloy such as HK-40 and the carbon steel or low alloy metal 2 are welded by using such welding material to form the weld metal 3. Since the content of Cr of the weld metal 3 decreases, the decarburization and carburization near the low alloy steel side bond are decreased, the hardness change is decreased and the difference in the coefft. of thermal expansion is lessened as well. The cracking is thus prevented and the creep strength characteristic, etc. are improved. |
