A tubular welding rod for laser cladding and gas welding and its preparation method

A laser cladding and welding rod technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve problems such as difficulty in using alone, and achieve the effect of eliminating gas protection, high hardness, and reducing cladding layer defects

Inactive Publication Date: 2018-08-14
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TiB compound powder is difficult to use alone, and needs to be combined with other metal powders to play its role

Method used

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  • A tubular welding rod for laser cladding and gas welding and its preparation method
  • A tubular welding rod for laser cladding and gas welding and its preparation method
  • A tubular welding rod for laser cladding and gas welding and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A tubular electrode for laser cladding and gas welding, consisting of a metal tube and a welding core located in the metal tube; the welding core is made by mixing 60g Co, 80g Ni, 10g WC and 850g face-centered cubic TiB powder , the particle size is -200 mesh; the metal tube is A3 low carbon steel.

[0041] The metal tube is a cylindrical or rectangular tube.

[0042] A preparation method of a tubular electrode for laser cladding and gas welding, comprising the following specific steps:

[0043] A. Preparation of solder core mixture

[0044] Accurately weigh 60g Co powder, 80g Ni powder, 10g WC powder and 850g face-centered cubic TiB powder, and mix them with ethanol at a weight ratio of 1:1 in a ball mill as a solder core material for use; the ball mill rotates at 300rpm , the ball milling time is 100 hours, the grinding ball material is stainless steel, and its diameter is 50mm;

[0045] B, electrode preparation

[0046] After the ethanol is volatilized, the spare...

Embodiment 2

[0050] Laser Cladding on Mn13 Steel Plate Using Welding Rod Prepared in Example 1

[0051] CO 2Laser equipment, the output power is 5kW, the spot diameter is 5mm, the laser mode is low-order mode, the base material is a rolled Mn13 steel plate, the steel plate is 1800mm long, 360mm wide and 12mm thick. A full-length groove is opened every 150mm on the steel plate, and the width and depth of the groove are 5.5mm and 5mm respectively. The electrode is implanted into the groove, and the material of the electrode tube is 08-Z steel. Put the Mn13 steel plate on the worktable, the worktable can move relative to the laser beam, and use the laser beam to align the welding rod embedded in the groove, so that the worktable moves relative to the laser beam at a speed of 10mm / s. After the cladding is complete, the steel plate is moved so that the laser is aimed at another electrode. By repeating the above process, multiple laser cladding layers are obtained on the steel plate, and the ...

Embodiment 3

[0053] Laser cladding on iron-based powder metallurgy materials using the electrode prepared in Example 1

[0054] CO 2 The output power of the laser equipment is 5 kW, the spot diameter is 5 mm, the laser mode is low-order mode, the base material is iron-based powder metallurgy material, the composition is Fe-2Cu-0.7C (wt%), and it is sintered at 1200 ℃ for 2 hours. , the density is 7.0g / cm 3 , the sample size is 10×10×65mm, and the scanning speed is 10mm / s. The properties of the obtained cladding layer are: depth 1mm, microhardness HV700, chemical composition of the cladding layer such as Figure 3a-Figure 3e shown. The presence of Ti element in the cladding layer indicates that the laser cladding layer contains face-centered cubic TiB phase.

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Abstract

The invention relates to a tubular welding rod for laser cladding and gas welding and a preparation method of the tubular welding rod for laser cladding and gas welding. The tubular welding rod consists of a metal tube and a core wire positioned in the metal tube, wherein the core wire is prepared by mixing the following components in percentage by weight: 2-10% of Co, 2-10% of Ni, 0.5-30% of wolfram carbide (WC) and 10-95% of face-centered cubic TiB powder; the granularity of each of Co, Ni, WC and the face-centered cubic TiB powder is -200 meshes; and the metal tube is prepared from an iron-based, copper-based, titanium-based or aluminum-based metal material. The preparation method of the tubular welding rod for laser cladding and gas welding comprises the following steps: preparation of a core wire mixture, and preparation and baking of the welding rod. The prepared welding rod not only is suitable for laser cladding, but also is suitable for gas welding. A cladding layer or a bead weld layer which is obtained from the welding rod is high in strength, high in hardness and good in corrosion resistance and wear resistance, and has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of metal material surface processing, and in particular relates to a tubular electrode for laser cladding and gas welding and a preparation method thereof. Background technique [0002] Laser cladding is a material surface modification method, which uses a high-energy laser beam to heat the cladding material and the metal at the same time, so that the cladding material and the metal surface are melted. The cladding layer of the cladding material. The structure of the cladding layer is very fine and the content of chemical elements is high, which is different from the base metal, and the cladding layer has high hardness, good wear resistance and corrosion resistance. Common laser cladding materials are various metal powder materials, such as ferrosilicon, ferromanganese, ferrovanadium, cobalt, chromium, and silicon, as well as high-hardness compound powder materials, such as tungsten carbide. During laser c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/02B23K35/32B23K35/40
CPCB23K35/0261B23K35/325B23K35/406
Inventor 徐庆坤高喜军王树珊
Owner JILIN UNIV
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