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Mo-contained stainless steel welding strip, preparation method thereof, sintered flux, preparation method thereof and single-layer electrode electroslag surfacing method

A technology of sintering flux and stainless steel, applied in welding equipment, manufacturing tools, welding media, etc., can solve problems such as low welding efficiency, high material cost, and easy side bending and cracking of weldments

Inactive Publication Date: 2019-03-26
HARBIN WELL WELDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in various hydrogenation process devices such as cracking, refining, and desulfurization in oil refining and petrochemical production, corrosion-resistant linings are widely used on the inner walls of many key equipment. Due to the use of surfacing stainless steel transition layer, the chemical composition and mechanical properties of the corrosion-resistant layer can easily meet the design and use requirements, but there are many problems such as low welding efficiency, high material cost, and high manufacturing cost; moreover, as With the enlargement of the hydrogenation process equipment, the corrosion-resistant lining on the inner wall of the equipment needs to increase the area of ​​surfacing welding, and the problems existing in the double-layer belt surfacing welding technology are highlighted. It greatly increases the cost of welding materials for equipment manufacturers and restricts equipment. Manufacturing plant development
The single-layer strip surfacing technology can save work efficiency and reduce production costs, but after welding with this technology, the weldment is prone to side bending and cracking

Method used

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  • Mo-contained stainless steel welding strip, preparation method thereof, sintered flux, preparation method thereof and single-layer electrode electroslag surfacing method
  • Mo-contained stainless steel welding strip, preparation method thereof, sintered flux, preparation method thereof and single-layer electrode electroslag surfacing method
  • Mo-contained stainless steel welding strip, preparation method thereof, sintered flux, preparation method thereof and single-layer electrode electroslag surfacing method

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preparation example Construction

[0023] The present invention provides the preparation method of the Mo-containing stainless steel welding strip described in the above technical solution, comprising the following steps:

[0024] The raw materials corresponding to the Mo-containing stainless steel welding strip components described in the above technical solution are mixed and melted, and then the obtained molten material is sequentially cast, forged and rolled to obtain the Mo-containing stainless steel welding strip.

[0025] In the present invention, raw materials corresponding to the components of the Mo-containing stainless steel welding strip are mixed and melted to obtain molten material. In the present invention, the mixing and melting temperature is preferably 1580-1630°C, more preferably 1520-1560°C; the mixing and melting time is preferably 60-120 minutes, more preferably 65-80 minutes.

[0026] After the molten material is obtained, the present invention sequentially performs casting, forging and r...

Embodiment 1

[0044] Provide raw materials according to the component numbered H316LF-1 in Table 1, mix the raw materials and melt at 1600°C for 80 minutes, then cast the molten material at 1600°C to obtain a cast body; forge the obtained cast body at 1200°C 3000×240×95mm rough, and then rolling at 1200°C, after each rolling, the thicknesses are 3.2mm, 1.8mm, 1.1mm, 0.65mm and 0.5mm respectively, and the thicknesses are 1.8mm, 1.1mm and 0.65 mm is annealed, the annealing temperature is 1050 ℃, and the thickness is 0.5mm, and the width is 60mm.

[0045] The raw materials are provided according to the component numbered SJ15F-1 in Table 2, wherein the mass ratio of Mo and Ni in the alloy agent is 1:1.5; the raw materials are mixed, granulated, and then sintered at 800 ° C to obtain a particle size of 10 ~60 mesh sintered flux.

[0046] Welding is carried out according to the process parameters shown in Table 3.

Embodiment 2

[0048] The components of the welding strip and its preparation method are the same as in Example 1. The raw materials of the sintered flux are shown in Table 2 as SJ15F-2. The mass ratio of Mo and Ni in the alloy is 1:1.5, and the sintering temperature is 800°C. A sintered flux with a particle size of 10-60 meshes was obtained; the welding parameters are shown in Table 3.

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Abstract

The invention provides a Mo-contained stainless steel welding strip, a sintered flux and a single-layer electrode electroslag surfacing method, and belongs to the technical field of welding. By meansof the Mo-contained stainless steel welding strip, chemical ingredients are reasonable, the ferrite content in a single-layer electrode electroslag surfacing layer can be reduced, and the problems oflateral bending and cracking of welded parts can be reduced.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a Mo-containing stainless steel welding strip and a preparation method thereof, a sintering flux and a preparation method thereof, and a single-layer strip electrode electroslag surfacing method. Background technique [0002] At present, in various hydrogenation process devices such as cracking, refining, and desulfurization in oil refining and petrochemical production, corrosion-resistant linings are widely used on the inner walls of many key equipment. Due to the use of surfacing stainless steel transition layer, the chemical composition and mechanical properties of the corrosion-resistant layer can easily meet the design and use requirements, but there are many problems such as low welding efficiency, high material cost, and high manufacturing cost; moreover, as With the enlargement of the hydrogenation process equipment, the corrosion-resistant lining on the inne...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/362B23K25/00C22C38/02C22C38/04C22C38/58C22C38/44C22C38/42
CPCB23K25/005B23K35/3086B23K35/3605B23K35/362C22C38/001C22C38/002C22C38/02C22C38/04C22C38/42C22C38/44C22C38/58
Inventor 徐锴邹力维冯伟曹宇堃胡晓波张庆素霍树斌孙婷婷宋昌洪宋立群王纯陈绍维
Owner HARBIN WELL WELDING CO LTD
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