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Flux production process for submerged arc welding

A production process, submerged arc welding technology, applied in the direction of welding medium, manufacturing tools, welding equipment, etc., can solve the problems of reducing production efficiency, increasing flux costs, prone to porosity, etc., to improve production efficiency and product performance, reduce raw materials Cost, the effect of avoiding the oxidation of iron powder

Active Publication Date: 2014-10-08
武汉天高熔接股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The flux used in the submerged arc welding method is a special kind of flux. The existing flux sintering flux process can only be sintered at low temperature. At the same time, special materials must be used after high temperature sintering. Time also increases the cost of flux and reduces production efficiency; and using conventional drying temperature, the moisture in the flux cannot be completely removed, which will also cause pores to appear during welding, and the content of diffusible hydrogen in the weld will increase. At the same time, the welding process performance Poor, the mechanical properties of the weld are low. At the same time, the performance of conventional temperature sintering is not easy to guarantee, and the drying temperature is difficult to control in the flux production process. The flux produced is used after submerged arc welding to shape the surface of the weld Poor, prone to pores

Method used

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  • Flux production process for submerged arc welding
  • Flux production process for submerged arc welding
  • Flux production process for submerged arc welding

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Flux production process for submerged arc welding, including the following steps:

[0019] ①. Ingredients: equipped with flux raw materials, the parts by weight of various components in the flux raw materials are: CaF 2 : 5, MgO: 30, Al 2 o 3 : 12, SiO 2 : 10, CaO: 8, MnO: 5, and impurities, adding iron powder that is 25 parts by weight in the raw materials provided;

[0020] ② Stirring: Prepare the raw materials into powder, after re-pounding, put them into the mixer for dry mixing, after mixing evenly, add the binder and put them into the wet mixer for wet mixing;

[0021] ③, granulation, drying, screening: Put the evenly stirred raw materials into the granulator for granulation, then dry the granulation and screen out the particles within the standard particle size range;

[0022] ④. Sintering: Send the particles into the sintering furnace, and sinter for 40 minutes at a temperature of 350 ° C. During sintering, argon gas with a flow rate of 0.5 liters / min is int...

Embodiment 2

[0026] Flux production process for submerged arc welding, including the following steps:

[0027] ①. Ingredients: equipped with flux raw materials, the parts by weight of various components in the flux raw materials are: CaF 2 : 7, MgO: 25, Al 2 o 3 : 9, SiO 2 : 13, CaO: 12, MnO: 8, and impurities, adding iron powder that is 32 parts by weight in the raw materials provided;

[0028] ② Stirring: Prepare the raw materials into powder, after re-pounding, put them into the mixer for dry mixing, after mixing evenly, add the binder and put them into the wet mixer for wet mixing;

[0029] ③, granulation, drying, screening: Put the evenly stirred raw materials into the granulator for granulation, then dry the granulation and screen out the particles within the standard particle size range;

[0030] ④. Sintering: Send the particles into the sintering furnace, and sinter for 30 minutes at a temperature of 550°C. During sintering, argon gas with a flow rate of 0.1 liter / min is introd...

Embodiment 3

[0034] Flux production process for submerged arc welding, including the following steps:

[0035] ①. Ingredients: equipped with flux raw materials, the parts by weight of various components in the flux raw materials are: CaF 2 : 10, MgO: 20, Al 2 o 3 : 6, SiO 2 : 16, CaO: 17, MnO: 5, and impurities, adding iron powder that is 40 parts by weight in the raw materials provided;

[0036] ② Stirring: Prepare the raw materials into powder, after re-pounding, put them into the mixer for dry mixing, after mixing evenly, add the binder and put them into the wet mixer for wet mixing;

[0037] ③, granulation, drying, screening: Put the evenly stirred raw materials into the granulator for granulation, then dry the granulation and screen out the particles within the standard particle size range;

[0038] ④. Sintering: Send the particles into the sintering furnace, and sinter for 36 minutes at a temperature of 450 ° C. During sintering, argon gas with a flow rate of 1 liter / min is intro...

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Abstract

The invention relates to the technical field of metal welding, in particular to a production process of a soldering flux used in a submerged-arc welding method. The production process comprises the following steps of: (1) preparing raw materials in parts by mass, and adding 25-40 parts of iron powder by weight to the prepared raw materials; (2) stirring: drily stirring the raw materials uniformly, and adding a binding agent to carry out wet stirring; (3) pelletizing, drying, and screening; (4) sintering: sending particles into a sintering furnace; sintering for 30-40min at the temperature of 350-550 DEG C, and introducing inert gases as protective gases in a sintering process at a flow rate of 0.1-1L / min while sintering; (5) cooling; and (6) screening a finished product of the soldering flux, packaging, checking, and putting in storage. As the inert gases are introduced while sintering, the oxidization of the iron powder in the soldering flux is effectively avoided, the common requirements of the drying temperature, the sintering temperature and the sintering time are reduced at the same time, and a welding seam welded by using the prepared soldering flux has very good mechanical property.

Description

technical field [0001] The invention relates to the technical field of metal welding, in particular to a production process of flux used in a submerged arc welding method. Background technique [0002] With the rapid development of the shipbuilding industry, as a pillar technology that plays an important role in shipbuilding—welding technology, its development will have a great impact on improving welding efficiency and quality, shortening the shipbuilding cycle, and developing and increasing the tonnage of shipbuilding. close relationship. Although submerged arc automatic welding can also perform single-layer welding from both sides with high efficiency for relatively thick plates, this method must first weld from one side, and then reversely weld the other side. In this way, it takes a long time to reverse the steel plate, which not only reduces the arc utilization rate of the submerged arc welding method with high work efficiency, but also has higher requirements for the...

Claims

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Application Information

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IPC IPC(8): B23K35/362
Inventor 汪小根孙学君徐险峰
Owner 武汉天高熔接股份有限公司
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