Novel alloy tool steel welding electrode

Abstract

The invention provides a superlow-hydrogen, high-strength and high-toughness alloy tool steel welding electrode with outstanding anticracking performance, which comprises a core wire and a welding electrode covering composition, wherein the electrode covering composition comprises the following components in percentage by weight: 35 to 45 percent of marble, 20 to 30 percent of fluorite, 2 to 4 percent of titanium white, 8 to 13 percent of ferrotitanium, 0.5 to 1.5 percent of alkali, 3 to 6 percent of metal chromium, 4 to 8 percent of metal manganese, 4 to 8 percent of nickel powder, 3 to 6 percent of ferromolybdenum, 2 to 6 percent of rare earth silicon, 2 to 6 percent of quartz and 2 to 6 percent of feldspar. The core wire is made of H08A steel or H08E steel, and potassium sodium mixed water glass is used as a bonder. The alloy tool steel welding electrode can be used as a superlarge-section alloy tool steel (5CrNiMo) structure welding electrode which used to lack and can be used for welding other high-strength alloy steel structure products. The welding electrode has an excellent welding process property, high welding strength, rigidity, plasticity and ductility.

Description

technical field [0001] The development of the welding rod is innovative, belongs to the technical field of welding materials, and is an alloy tool steel welding rod with ultra-low hydrogen, high strength and high toughness. It is mainly used for welding the formwork and base of forging equipment equipped with 40Cr, 45Cr, 5CrNiMo as the substrate hardness HRC = 32-36. Its characteristics: it is suitable for forging under harsh environmental conditions, has high strength, high toughness, good overall welding performance, and the tensile strength is greater than or equal to 1000MPa. Background technique [0002] In the forging industry, the mold base is a very important process equipment, and its technical status directly affects the life of the mold and product quality, especially the characteristics of the mold base body: large tonnage, 2 to 30 tons, expensive, 10 ~6 million yuan, strict dimensional accuracy, heavy load and harsh environmental conditions in production and us...

AI Technical Summary

Problems solved by technology

[0005] Based on this, several surfacing welding electrodes were selected. Although the strength, rigidity and toughness can all be satisfied, the crack resistance is poor, the labor intensity is high, the rework is much, and the time is long.