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Preparing method for welding rod for pressure steel pipe welding

A welding pressure and welding rod technology, applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of narrow space in the operation site, difficult gas emission, easy to be corroded by moisture, etc., and the preparation method is simple and easy , reduce health hazards, the effect of a reasonable ratio

Inactive Publication Date: 2017-09-29
HEFEI ANLI ELECTRIC POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the narrow space of the operation site during the steel pipe welding construction process, the gas generated by the welding rod is not easy to escape, and some gases may cause harm to the human body
And because the penstock is buried underground for a long time, it is easy to be corroded by moisture, especially at the welding place, it is easy to rust, so it is necessary to propose a welding rod for penstock

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing welding rods for welding penstocks, comprising the following raw materials in parts by weight:

[0025] Step 1: sintering the medicinal powder, mixing the components in the medicinal skin evenly, adding an adhesive, and placing it at room temperature for 12 hours to dry to form a medicinal powder;

[0026] Then put the dried medicinal powder into a sintering furnace, and sinter in the sintering furnace at a high temperature of 800°C for 60 minutes to fully remove the crystal water and adsorption water in the medicinal powder;

[0027] Step 2: Configure water glass, mix the potassium water glass with a concentration of 35% and the sodium water glass with a concentration of 50% according to the ratio of 1:2, and stir evenly to form a potassium-sodium mixed water glass;

[0028] Step 3: Stir and adjust the powder, add the potassium-sodium mixed water glass obtained in step 2 to the medicated powder obtained in step 1, the addition of potassium-sodium...

Embodiment 2

[0040] A method for preparing welding rods for welding penstocks, comprising the following raw materials in parts by weight:

[0041] Step 1: sintering the medicinal powder, mixing the components in the medicinal skin evenly, adding an adhesive, and placing it at room temperature for 18 hours to dry to form a medicinal powder;

[0042] Then put the dried medicinal powder into a sintering furnace, and sinter in the sintering furnace at a high temperature of 850°C for 80 minutes to fully remove the crystal water and adsorption water in the medicinal powder;

[0043] Step 2: Configure water glass, mix the potassium water glass with a concentration of 40% and the sodium water glass with a concentration of 60% according to the ratio of 1:2, and stir evenly to form a potassium-sodium mixed water glass;

[0044] Step 3: Stir and adjust the powder, add the potassium-sodium water glass obtained in step 2 to the medicated powder obtained in step 1, the amount of potassium-sodium mixed w...

Embodiment 3

[0056] A method for preparing welding rods for welding penstocks, comprising the following raw materials in parts by weight:

[0057] Step 1: sintering the medicinal powder, mixing the components in the medicinal skin evenly, adding an adhesive, and placing it at room temperature for 24 hours to dry to form a medicinal powder;

[0058] Then put the dried medicinal powder into a sintering furnace, and sinter in the sintering furnace at a high temperature of 900°C for 90 minutes to fully remove the crystallization water and adsorption water in the medicinal powder;

[0059] Step 2: configure water glass, the concentration is 45% potassium water glass and the concentration is 65% sodium water glass, after mixing according to the ratio of 2:1, stir evenly, form potassium sodium mixed water glass;

[0060] Step 3: Stir and adjust the powder, add the potassium-sodium water glass obtained in step 2 to the medicated powder obtained in step 1, the addition of potassium-sodium water gla...

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PUM

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Abstract

The invention discloses a preparing method for a welding rod for pressure steel pipe welding. Raw materials are included according to the weight. The method comprises the first step of powder sintering, the second step of water glass preparing, the third step of powder stirring and matching, the fourth step of welding rod preparing, the fifth step of welding rod baking and the sixth step of cooling of the welding rod baked in the fifth step to the normal temperature, packaging and finished product obtaining. The preparing method for the pressure steel pipe welding rod is simple, feasible and low in cost; according to a welding line welded through the welding rod, the welding metal strength is high (Rm>=780 MPa), raw materials adopted in a welding core are reasonable in matching, excessive impurity elements in the welding rod powder can be effectively reduced, little gas is generated during welding, and harm to the body health of people can be reduced.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a preparation method of welding rods for welding pressure steel pipes. Background technique [0002] In recent years, with the continuous development of light weight and large-scale steel structures such as pressure vessels and hydropower, especially in order to reduce the earth's CO2 emissions, the environmental principle of "energy saving and emission reduction" has been followed. The design and use of high-strength steel structures has been greatly developed. As the design strength and toughness reserves of high-strength steel structures increase, the requirements for welding materials continue to put forward new technical index requirements. [0003] At present, with the continuous updating of design indicators in the domestic hydroelectric power generation industry, 80kg hydroelectric pressure steel pipes have gradually replaced 60kg hydroelectric pressure stee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/40
CPCB23K35/40B23K35/404
Inventor 殷世尧
Owner HEFEI ANLI ELECTRIC POWER ENG CO LTD