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Welding flux used for ferrum-based material heat-released jointing and igniting agent thereof

An iron-based material, exothermic welding technology, used in aluminothermic welding equipment, welding/cutting media/materials, welding media, etc. Hardenability and improved corrosion resistance

Active Publication Date: 2014-07-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is to solve the vacancy of special solder for exothermic welding of iron-based materials, and the welded joint obtained by the existing exothermic solder contains impurities, and the difference in thermal expansion coefficient causes relatively large residual stress, resulting in poor performance of the welded joint. Provide a solder and its igniter specially used for exothermic welding of iron-based materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Specific Embodiment 1: A solder used for exothermic welding of iron-based materials in this embodiment consists of 45-55 parts by weight of iron oxide powder, 20-30 parts of 304 stainless steel powder, and 15-20 parts of industrial Pure aluminum powder, 2-5 parts of niobium powder, 1-2 parts of copper powder, 2-3 parts of ferrosilicon powder, 1-2 parts of ferromanganese powder, 1-3 parts of fluorspar powder, 2-4 parts It consists of marble powder and 1-2 parts of lanthanum-cerium alloy powder;

[0017] The mass percentage content of chromium element in the 304 stainless steel is 18%-20%, and the mass percentage content of nickel element is 8%-12%;

[0018] The mass percent content of silicon in the ferrosilicon powder is 14% to 16%;

[0019] The mass percentage of manganese in the ferromanganese powder is 80%~87%;

[0020] The mass percentage content of cerium element in the lanthanum-cerium alloy powder is 62%-68%, and the mass percentage content of lanthanum element...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that: the particle size of the iron oxide powder is 60 mesh to 270 mesh; the mass percentage of iron oxide in the iron oxide powder is ≥99%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment is different from Embodiment 1 in that: the particle size of the iron oxide powder is 200 mesh; the mass percentage of iron oxide in the iron oxide powder is 99.5%. Others are the same as in the first embodiment.

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Abstract

The invention relates to a welding flux used for ferrum-based material heat-released jointing and an igniting agent of the welding flux. The welding flux and the igniting agent aim to solve the problems that supply of welding fluxes special for heat-released jointing of ferrum-based materials is not enough, welding joints acquired through prior heat-released jointing welding fluxes contain impurities, large residual stress is caused by difference in coefficients of thermal expansion, and welding joint performance is poor. The welding flux used for ferrum-based material heat-released jointing is composed of ferric oxide powder, 304 stainless steel powder, commercial-purity aluminum powder, niobium powder, copper powder, ferrosilicon powder, ferromanganese powder, fluorite powder, marble powder and lanthanum-cerium alloy powder. The igniting agent of the welding flux used for ferrum-based material heat-released jointing is composed of magnesium powder, barite powder, commercial-purity aluminum powder, red phosphorus powder and fluorite powder. In the using process, the weight ratio of the welding flux used for ferrum-based material heat-released jointing to the igniting agent is (50-60):1. The welding flux and the igniting agent are used for ferrum-based material jointing.

Description

technical field [0001] The present invention relates to solder for exothermic welding and its igniter. Background technique [0002] Iron is one of the main components of the earth's crust and is widely distributed in nature. People have long used iron for production and daily life, and since the beginning of the modern industrial revolution, they have relied on this metal on a large scale. With the development of science and technology, various new materials come out, and gradually expand the scope of application. However, due to the cost and production capacity of new materials, iron-based materials (such as low-carbon steel, high-carbon steel, stainless steel and other high-alloy iron-based materials) still have an absolute advantage in the world. Iron-based materials are widely used, and connection problems will inevitably be involved in the construction and production process. Conventional arc welding technology requires high energy input and relatively strict constr...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/22
CPCB23K23/00B23K35/0255B23K35/3093
Inventor 李卓然冯广杰朱洪羽梁广省张健刘羽
Owner HARBIN INST OF TECH
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