Nickel base alloy welding wire with diameter smaller than 3 mm

Abstract

The invention relates to a nickel base alloy welding wire. Alloy of the nickel base alloy welding wire comprises, by mass, 0.4%-0.45% of C, 1.0%-1.5% of Mn, 0.15%-1.2% of Si, 0.025% or less of P, 0.02% or less of S, 28%-30% of Cr, 49%-51% of Ni, 0.1% or less of Co, 0.1% or less of Mo, 0.1% or less of Ti, 0.1% or less of Al, 4.0%- 5% of W and the balance being Fe. A method for preparing the nickel base alloy welding wire includes the steps of alloy smelting, electroslag remelting, hot forging and blooming, hot rolling and annealing, acid pickling and coping, cold drawing and hydrogen withdrawing. A CaF2 slag system, an Al2O3 slag system and a CaO slag system are adopted in electroslag remelting. Through the method for preparing the nickel base alloy welding wire, the thin welding wire with the performance meeting requirements can be prepared, and the yield is high.

Description

technical field [0001] The invention relates to a welding wire and belongs to the technical field of alloys. Background technique [0002] Cr28Ni48W5 nickel-based alloy has high temperature resistance and can be made into welding wire for repairing high temperature resistant metal materials. However, Cr28Ni48W5 alloy has a high content of chromium and tungsten, and low content of aluminum, titanium and other elements. Therefore, Cr28Ni48W5 alloy has poor processing plasticity and is a kind of high-temperature welding wire material that is difficult to deform. It is generally used to manufacture thicker welding wire. When the welding wire is thinner, the yield is extremely low. [0003] Chinese patent document CN 101249591 discloses a nickel-based welding wire and its preparation process. The welding wire has a very high nickel content and does not contain tungsten. become. [0004] Chinese patent document CN 102912151 discloses an ultra-pure electroslag remelting method f...

AI Technical Summary

Problems solved by technology

However, Cr28Ni48W5 alloy has a high content of chromium and tungsten, and low content of aluminum, titanium and other elements. Therefore, Cr28Ni48W5 alloy has poor processing plasticity and is a kind of high-temperature welding wire material that is difficult to deform. It is generally used to manufacture thicker welding wire. When the welding wire is thinner, the finished product rate is extremely low