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Welding flux for submerged-arc welding of 12Cr2Mo1R alloy steel pipe and preparation method of welding flux

A 12cr2mo1r, alloy steel pipe technology, used in arc welding equipment, welding equipment, welding equipment, etc., can solve the problems of poor wettability and poor slag removal, and achieve the effect of good wettability

Pending Publication Date: 2021-08-06
HEFEI ZIKING PIPE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a flux for submerged arc welding of 12Cr2Mo1R alloy steel pipes, which can overcome the problems of poor wettability and poor slag removal of existing fluxes when welding deep grooves and narrow gaps

Method used

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  • Welding flux for submerged-arc welding of 12Cr2Mo1R alloy steel pipe and preparation method of welding flux
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  • Welding flux for submerged-arc welding of 12Cr2Mo1R alloy steel pipe and preparation method of welding flux

Examples

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Effect test

Embodiment 1

[0033] A flux for submerged arc welding of 12Cr2Mo1R alloy steel pipes, prepared from the following raw materials in parts by weight: 17 parts by weight of aluminum oxide, 13 parts of calcium oxide, 7 parts of manganese oxide, 22 parts of magnesium fluoride, 20 parts of magnesium oxide, 8 parts of silicon, 5 parts of ferrosilicon, 6 parts of electrolytic manganese, 1.5 parts of medium carbon ferrochromium, 6 parts of chromium powder, 3 parts of molybdenum powder, 4 parts of rare earth fluoride.

[0034]The preparation method of the flux is as follows: mix the raw materials used for preparing welding evenly, add water glass and stir and mix evenly to make a granular mixture with a particle size of 40 meshes; The material is sintered at 350°C for 30 minutes, and then heated to 850°C for 2 hours to obtain the flux;

[0035] Described water glass is pure potassium water glass, and its modulus is equal to 2.8, and the Baume degree at 20 ℃ is 45 ° Be '.

Embodiment 2

[0037] The flux in this embodiment is basically the same as that in Example 1. The difference is that the flux in this embodiment is prepared from the following raw materials in parts by weight: 16 parts of aluminum oxide, 12 parts of calcium oxide, 5 parts of manganese oxide, fluoride 16 parts of magnesium, 17 parts of magnesium oxide, 5 parts of silicon oxide, 3 parts of ferrosilicon, 4 parts of electrolytic manganese, 1 part of medium carbon ferrochrome, 4 parts of chromium powder, 2 parts of molybdenum powder, and 2 parts of rare earth fluoride.

Embodiment 3

[0039] The flux in this embodiment is basically the same as that in Example 1. The difference is that the flux in this embodiment is prepared from the following raw materials in parts by weight: 19 parts of aluminum oxide, 14 parts of calcium oxide, 8 parts of manganese oxide, fluoride 25 parts of magnesium, 22 parts of magnesium oxide, 10 parts of silicon oxide, 7 parts of ferrosilicon, 7 parts of electrolytic manganese, 2.5 parts of medium carbon ferrochrome, 8 parts of chromium powder, 4 parts of molybdenum powder, and 5 parts of rare earth fluoride.

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Abstract

The invention relates to the technical field of material welding, in particular to welding flux for submerged-arc welding of a 12Cr2Mo1R alloy steel pipe and a preparation method of the welding flux. The welding flux is prepared from the following raw materials including, by weight, 15-20 parts of aluminum oxide, 10-15 parts of calcium oxide, 3-9 parts of manganese oxide, 15-30 parts of magnesium fluoride, 15-25 parts of magnesium oxide, 3-12 parts of silicon oxide, 1-8 parts of silicon iron, 2-8 parts of electrolytic manganese, 0.5-3 parts of medium carbon ferrochrome, 3-10 parts of chromium powder, 1-5 parts of molybdenum powder and 1-6 parts of rare earth fluoride. In the welding flux, the use levels of all the raw material components are controlled within a certain proportion range, it is guaranteed that the welding flux has the good deoxidation capacity in the using process, and the effect of improving deslagging is achieved; and in addition, through cooperation of the raw material components, the content of main alloy elements in the welding seam is effectively controlled, burning losses of element chromium or carbon in the welding seam is compensated, it is ensured that the content of the element carbon is controlled within a reasonable interval, and the room-temperature strength, the high-temperature strength and the impact toughness of the welding seam are remarkably improved.

Description

technical field [0001] The invention relates to the technical field of material welding, in particular to a flux for submerged arc welding of 12Cr2Mo1R alloy steel pipes and a preparation method thereof. Background technique [0002] 12Cr2Mo1R pearlitic heat-resistant alloy steel is a heat-strength steel and hydrogen-resistant steel widely used in the world. Due to the addition of alloying elements such as Cr and Mo in low carbon steel, the comprehensive performance of the steel is greatly improved. For example, it has good high-temperature mechanical properties, high-temperature oxidation resistance, corrosion resistance, good toughness, process performance and weldability, so it is widely used in the manufacture of petrochemical, coal conversion, nuclear power, steam turbine cylinder, thermal power and other operating conditions Large-scale equipment with harsh and complex corrosive media. [0003] The weldability of steel, generally the smaller the carbon equivalent, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/02B23K35/28B23K35/36B23K9/18
CPCB23K35/0255B23K35/286B23K35/284B23K35/3605B23K9/18
Inventor 贾庆浩彭静葛兰王云飞金琴
Owner HEFEI ZIKING PIPE INC
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