Overlaying welding flux-cored wire for S pipe valve, glass-like plate and wear ring of concrete pump

A technology of concrete conveying pump and spectacle plate, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of poor wear resistance, short service life, unsatisfactory, etc., to improve structure and distribution, improve Wear resistance, the effect of improving toughness

Active Publication Date: 2009-12-16
ZHUZHOU ZHENXIANG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no dedicated surfacing welding wire for concrete delivery pumps in the prior art; although general surfacing welding electrodes have high hardness, they have poor wear resistance and short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 (surfacing welding of spectacle plates): alloy powders such as high-carbon ferrochrome, ferro-vanadium, ferro-molybdenum, niobium powder, metal manganese, ferro-boron, ferrosilicon, rare earth, tungsten powder, etc. The chemical composition of the cored wire is C3.8, vanadium 3.0, chromium 32, niobium 2.5, manganese 1.5, boron 0.7, silicon 1.0, rare earth 2.6, tungsten 7.0, molybdenum 3.0, and the balance is Fe. Spectacle plate Q235 steel plate, surfacing welding after blanking, the welding process is as follows:

[0018] Wire diameter: Φ3.0, welding current: 250-280A, welding voltage: 28-34V

[0019] The spectacle plate after surfacing is put into the next process: the finished spectacle plate is made, and the hardness of the surfacing layer can reach HRC65. The use effect shows that the spectacle plate after surfacing with this flux-cored wire is 1.5 times of the original. The welding efficiency is 3-4 times that of welding rods. The electric energy on...

Embodiment 2

[0020] Embodiment 2 (wear-resistant ring surfacing): high-carbon ferrochrome, ferro-vanadium, ferro-molybdenum, niobium powder, manganese metal, ferro-boron, ferrosilicon, rare earth, tungsten powder and other alloy powders are made into flux-cored welding wire according to the proportion. The chemical composition of the flux-cored wire is C 3.8, vanadium 3.0, chromium 32, niobium 2.5, manganese 1.5, boron 0.7, silicon 1.0, rare earth 2.6, tungsten 7.0, molybdenum 3.0, and the balance is Fe. The wear-resistant ring is forged billet of No. 35 steel, which is surfacing after rough turning. The welding process is as follows:

[0021] Wire diameter: Φ3.0, welding current: 250-280A, welding voltage: 28-34V,

[0022] The wear-resistant ring after surfacing is put into the next process: the finished wear-resistant ring is made, and the hardness of the surfacing layer can reach HRC65. The use effect shows that the service life of the workpiece after surfacing welding is greatly impro...

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PUM

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Abstract

The invention relates to an overlaying welding flux-cored wire for an S pipe valve, a glass-like plate and a wear ring of a concrete pump. The flux-cored wire comprises the following chemical compositions in percentage by weight: 3.0 to 4.0 percent of carbon, 2.5 to 3.5 percent of vanadium, 28 to 34 percent of chromium, 2.5 to 3.5 percent of niobium, 1.0 to 3.0 percent of manganese, 0.5 to 1.5 percent of boron, 0.5 to 2.0 percent of silicon, 2.5 to 3.0 percent of rare earth, 6.0 to 8.0 percent of tungsten, 2.5 to 3.5 percent of molybdenum, and the balance of iron. The sheath is made of a low carbon steel belt, and the core part is filled with alloy powder of the compositions and is drawn into the flux-cored wire. The overlaying welding flux-cored wire manufactured according to the chemical compositions has good overlaying welding performance, nice appearance, high strength, high hardness, excellent impact resistance, good wear resistance and long service life, has hardness reaching HRC of more than or equal to 65, and is the perfect overlaying welding flux-cored wire for manufacturing and repairing the S pipe valve, the glass-like plate and the wear ring of the concrete pump in the construction industry.

Description

technical field [0001] The invention relates to a surfacing welding wire, in particular to a surfacing flux-cored welding wire used for S-pipe valves, spectacle plates and wear-resistant rings of concrete delivery pumps in the construction industry. technical background [0002] At present, the S-pipe valve, eye plate and wear-resistant ring of the concrete delivery pump manufactured in the construction industry use surfacing electrodes. Due to the continuous delivery of concrete, the above-mentioned components are severely worn and the delivery pump cannot work normally and has a short service life. The above-mentioned components of the concrete delivery pump are required to have sufficient hardness, strength, impact resistance, and good wear resistance for welding rod surfacing. And there is no surfacing welding wire of special-purpose concrete delivery pump in the prior art; Although general surfacing welding electrodes have high hardness, they have poor wear resistance a...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40
Inventor 王彪王祖胜
Owner ZHUZHOU ZHENXIANG IND CO LTD
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