Flux cored wire for impact-resistant nonstick steel overlaying

Abstract

The invention discloses a flux cored wire for impact-resistant nonstick steel overlaying. The flux cored wire comprises the following components in percentage by weight: 0.4-0.5 percent of carbon, 12.5-14.0 percent of chromium, 1.5-2.0 percent of manganese, 0.5-0.8 percent of silicon, 2.0-2.5 percent of nickel, 1.0-1.8 percent of molybdenum, 0.5-0.8 percent of vanadium, 0.2-0.5 percent of niobium, less than or equal to 0.010 percent of phosphorus, less than or equal to 0.010 percent of sulfur and the balance of Fe. The flux cored wire is used for surface overlaying strengthening of a wide andheavy plate frame roller; no welding defects such as bubbles, cracks and the like exist on the overlaid surface; and the flux cored wire has the mechanical performance such as high strength, impact toughness and the like, crucially has steel sticking resistance and meets the production requirements of a wide and heavy plate production line.

Description

technical field [0001] The invention relates to welding materials, in particular to a tubular welding wire for shock-resistant non-stick steel overlay welding. Background technique [0002] Tubular welding wire is plastic metal strip, which is made of tubular welding wire with filler wrapped in it by special manufacturing process. Its outer stainless steel strip and inner flux core alloy powder. [0003] Modern technology usually uses a wire forming machine to roll the plastic strip into a U-shape, fill it with uniform fillers prepared from various pre-alloy powders, and pass through multi-roll continuous rolling (the number of rolls is the least) More than a dozen pairs, as many as twenty or thirty pairs), the opening is closed, and then rolled into a tube wire of the required size. [0004] Although the development of tubular welding wire began in the 1920s, it has been widely used in recent years. The main reason is that its manufacturing process and fillers in the tube ...

AI Technical Summary

Problems solved by technology

Although there is a certain amount of silicon and manganese in the deposited metal, its welding performance is poor, and it is prone to hot cracks and steel sticking.