Modified austenitic stainless steel surfacing electrode and preparation method thereof

A technology of austenitic stainless steel and surfacing electrodes, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of maintenance time delay, pressure vessel maintenance difficulty, high maintenance cost, etc., and achieve the effect of improving physical and chemical properties

Active Publication Date: 2021-03-05
鄂尔多斯市特种设备检验所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The internal maintenance of the pressure vessel is difficult and the maintenance cost is high. At the same time, the mai

Method used

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  • Modified austenitic stainless steel surfacing electrode and preparation method thereof
  • Modified austenitic stainless steel surfacing electrode and preparation method thereof
  • Modified austenitic stainless steel surfacing electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a modified austenitic stainless steel surfacing electrode includes a coating 1 and a welding core; the welding core includes a second interlayer 2, an outer layer of the welding core 3, a first interlayer 4 and an inner layer of the welding core from outside to inside 5. The inner layer 5 of the welding core includes metal chromium powder and graphite; the outer layer 3 of the welding core includes nickel powder, silicon powder, manganese powder and iron powder; the weight percentage of each component in the inner layer 5 of the welding core and the outer layer 3 of the welding core is: metal Chromium powder 22.26-24.73%, graphite 0.05-0.12%, nickel powder 9.89-13.6%, silicon powder 0.93%, manganese powder 2.47% and iron powder 58.15-64.4%; the materials of the first interlayer and the second interlayer are both No. 10 steel.

[0036] The above-mentioned modified austenitic stainless steel surfacing electrode changes the traditional electrod...

Embodiment 2

[0038] Such as figure 1 As shown, a modified austenitic stainless steel surfacing electrode includes a coating 1 and a welding core; the welding core includes a second interlayer 2, an outer layer of the welding core 3, a first interlayer 4 and an inner layer of the welding core from outside to inside 5. The inner layer 5 of the welding core includes metal chromium powder and graphite; the outer layer 3 of the welding core includes nickel powder, silicon powder, manganese powder, rare earth element oxides and iron powder; The weight percentage is: metal chromium powder 22.26-24.73%, graphite 0.05-0.12%, nickel powder 9.89-13.6%, silicon powder 0.93%, manganese powder 2.47%, rare earth oxide powder 2.47%-6.18% and iron powder 51.97-61.93% %.

[0039] For the above-mentioned modified austenitic stainless steel surfacing electrode, rare earth element oxides are added to the outer layer 3 of the welding core. Under the action of molten pool reflow during the welding process, the...

Embodiment 3

[0041] Such as figure 1 As shown, a modified austenitic stainless steel surfacing electrode includes a coating 1 and a welding core; the welding core includes a second interlayer 2, an outer layer of the welding core 3, a first interlayer 4 and an inner layer of the welding core from outside to inside 5. The inner layer 5 of the welding core includes metal chromium powder, graphite and molybdenum powder; the outer layer 3 of the welding core includes nickel powder, silicon powder, manganese powder, rare earth element oxide and iron powder; the inner layer 5 of the welding core and the outer layer 3 of the welding core The weight percentage of each component is: metal chromium powder 19.78-22.56%, graphite 0.043%, molybdenum powder 2.47-3.71%, nickel powder 9.89-13.6%, silicon powder 0.93%, manganese powder 2.47%, rare earth oxide powder 2.47%- 6.18% and iron powder 50.51-61.95%.

[0042] The above-mentioned modified austenitic stainless steel surfacing welding electrode adds...

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PUM

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Abstract

The invention discloses a modified austenitic stainless steel surfacing electrode and a preparation method thereof. The modified austenitic stainless steel surfacing electrode comprises a coating anda core wire, and the core wire comprises a second interlayer, a core wire outer layer, a first interlayer and a core wire inner layer from outside to inside; the core wire inner layer comprises metalchromium powder and graphite; and the core wire outer layer comprises nickel powder, silicon powder, manganese powder and iron powder. According to the modified austenitic stainless steel surfacing electrode and the preparation method thereof, a traditional welding rod structure is creatively changed for the first time, the inner layer and the outer layer of the core wire are filled with the high-melting-boiling-point elements and the low-melting-boiling-point elements respectively, most of the low-melting-point elements and the low-boiling-point elements are prevented from entering a high-temperature area in the center of a molten pool to be evaporated, and the physical and chemical properties such as strength and corrosion resistance of a weld joint are effectively improved.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a modified austenitic stainless steel surfacing electrode and a preparation method thereof. Background technique [0002] In the regular inspection of pressure vessels in recent years, there are frequent cases where the normal and safe use of pressure vessels is affected due to surface cracking and corrosion wear of the stainless steel surfacing layer. The internal maintenance of the pressure vessel is relatively difficult and the maintenance cost is high. At the same time, the maintenance time delays the normal start-up and production, which has a great impact on the benefits of chemical enterprises. [0003] During the welding process, the temperature field of the molten pool is unevenly distributed, and the temperature gradually decreases from the center to the periphery. The elements in the welding core of the traditional electrode are evenly distributed, and the elements ar...

Claims

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Application Information

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IPC IPC(8): B23K35/02B23K35/40
CPCB23K35/02B23K35/0266B23K35/40B23K35/406
Inventor 王子荣郭铮郑丽马玉华李少峰焦小勇
Owner 鄂尔多斯市特种设备检验所
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