Aqueous nickel welding paste for stainless steel brazing

• Main Authors: LIU FENGMEI, YANG KAIZHEN, YI ZHENHUA, LIU SHITIAN, ZHAO SIYONG, XIANG JIE, ZHANG YUPENG
• Format: Patent
• Language: Chinese; English
• Published: 07.09.2011
• 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

The present invention relates to an aqueous nickel welding paste for stainless steel brazing, which has the characteristics that: the welding paste is formed by 90-96 percent of brazing filler metal and 4-10 percent of paste binders by weight percentage; the brazing filler metal comprises 4-18 percent o f Cr, 0.2-4 percent of Fe, 0.01-0.1 percent of C, 0.1-5 percent of Si, 5-10 percent of P and remaining amount is Ni. The paste binder is formed by the following constituents by weight percentage: 28-58 percent of mixture of carboxymethylcellulose with 10000-1000000 molecular weight and methylcellulose, 40-70 percent of aqueous solvent and 1-10 percent of lubricants; or the paste binder is formed by 25-55 percent of one or a plurality of polyacrylamide with 1000-10000 molecular weight, polyacrylic acid, polymethylacrylic acid and copolymer, polyvinyl alcohol or polyoxyethylene, 40-70 percent of aqueous solvent and 1-10 percent of lubricants. The welding paste is the aqueous nickel welding paste which is conveni