Preparation method of thermal strength steel welding rod and quality inspection tool

Abstract

The invention discloses a preparation method of a thermal strength steel welding rod and a quality inspection tool thereof, and relates to the technical field of welding rod production quality inspection, and the welding rod comprises a core wire and a coating wrapping the peripheral surface of the core wire. The preparation method comprises the following steps that 1, coating raw materials and the core wire are prepared, the coating raw materials comprise the following components in parts by weight: 25 to 40 parts of calcium carbonate, 10 to 15 parts of fluoride, 2 to 5 parts of titanium dioxide, 2 to 5 parts of silicon dioxide, 2 to 6 parts of potassium feldspar, 1 to 3 parts of ferrotitanium, 2 to 6 parts of medium carbon ferromanganese, 2 to 5 parts of ferrosilicon, 3 to 6 parts of carbon ferrochrome, 2 to 4 parts of nickel powder, 2 to 4 parts of copper powder, 0.5 to 1 part of sodium alginate and 20 to 30 parts of iron powder; the core wire is strip-shaped carbon steel; and 2, the coating raw materials are stirred, the coating raw materials are put into a container, and water glass is poured into the container and stirred uniformly. According to the preparation method of the thermal strength steel welding rod and the quality inspection tool thereof, the thermal strength steel welding rod can be used for repair welding after casting of important parts of a turbine tester, and components, color and other properties all meet design requirements.

Description

technical field [0001] The invention relates to the technical field of welding rod production quality inspection, in particular to a preparation method and quality inspection tooling of a heat-strength steel welding rod. Background technique [0002] Heat-strength steel welding rod is a medium-alloy steel welding material, which is often used in heat-resistant steel structures. Because of its excellent high-temperature resistance strength and high-temperature creep resistance, it is often used in superheated pipes of high-temperature and high-pressure boiler power stations and petroleum refining equipment. , Heaters, heads and valves are also used as important components of aero-engines. [0003] When the currently prepared heat-strength steel welding electrodes are applied to the welding repair of the important parts of the turbine tester after casting, the properties after welding repair are usually not satisfied due to the color and heat treatment specifications of the ou...

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Problems solved by technology

[0003] When the currently prepared heat-strength steel welding electrodes are applied to the welding repair of the important parts of the turbine tester after casting, the properties after welding repair are usually not satisfied due to the color and heat treatment specifications of the outer parts. After heat-strength steel welding rods, it is usually necessary to check the hardness or elasticity of the welding rods. However, during the current quality inspection, there is no professional quality inspection device to clamp the welding rods, and it is often necessary to manually hold the welding rods for quality inspection.

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