Welding agent-core welding wire for titanium and titanium alloy

Abstract

The invention provides a welding agent-core welding wire for titanium and titanium alloy. The welding wire is composed of an outer skin and an internal active welding agent core. The outer skin is composed of a titanium belt in which the mass percent of titanium is not less than 98% and the mass percent of hydrogen is not more than 0.015%, and the internal active welding agent core consisting of metal power, Si powder, B powder and an active agent, and comprising the following components in percentage by weight: 16%-34% of Ti, 2%-6% of B, 0.2-0.4% of Co, 0.8-1% of Mn, 0.10%-0.25% of Si, 1%-3% of Ni, 1%-3% of Ni, 1%-3% of Cu, 1%-5% of chloride, 12%-16% of fluoroaluminate, 5%-15% of MgF2, and 20%-60% of SrF2, wherein the chloride, the fluoroaluminate, MgF2 and SrF2 are active agent components in the welding agent core. The welding wire is large in welding depth-to-width ratio and high in melting efficiency, so that the welding technology is simplified in process, and applicable to welding the titanium and titanium alloy.

Description

technical field [0001] The invention belongs to the technical field of welding materials and is used for welding titanium and titanium alloy materials. Background technique [0002] Titanium and its alloys have excellent corrosion resistance, low density, high specific strength, good toughness, low temperature performance and high temperature performance, and are widely used in aerospace, automobile, chemical, metallurgy, shipbuilding, nuclear power and other industrial sectors. Among them, titanium alloy plate welding parts are widely used in some special occasions, such as the manufacture of artificial earth satellites, space shuttles, etc. In addition, welding is also an important means of application and maintenance of titanium alloy materials, so the study of titanium alloy welding is of great significance to industrial development. . [0003] At present, welding methods such as argon arc welding, submerged arc welding and electron beam welding can be used for titanium...

AI Technical Summary

Problems solved by technology

Although the above-mentioned solid welding wire can obtain a joint with better performance, in the application process, in order to obtain a larger penetration depth and reduce energy consumption, it is usually used manually with an active agent. For example, the patent CN104646866A discloses a titanium alloy welding activity However, the efficiency of the manual coating method is low, and the coating layer of the active agent is easy to fall off during the welding process, which affects the welding quality

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