CO2 gas shielded-spraying powder feeding composite overlaying process

A gas shielded welding and gas shielded technology, which is applied in the direction of manufacturing tools, welding equipment, arc welding equipment, etc., can solve the problems that high melting point ceramics cannot be sprayed, the production efficiency of manual arc surfacing welding is low, and automatic welding cannot be achieved.

Inactive Publication Date: 2010-06-09
JIAMUSI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Manual arc surfacing welding has low production efficiency and cannot achieve automatic welding
Oxygen-ethylene flame spray welding also has the di...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: CO2 gas shielded welding (PANA-AUTO KR II 350 CO2 / MAG), select wire material H08Mn2Si, powder high carbon ferrochrome. Use CO2 gas shielded welding and jet powder feeding mechanism to weld on low carbon steel sheet, adjust current to 160A, voltage to 24V, powder feeding gas flow to 5ml / min, welding speed to 200mm / min, jet powder feeding angle to 60° , surfacing a layer of weld seam, and the surface of the surfacing layer obtains a Rockwell hardness of 52.

Embodiment 2

[0020] Example 2: CO2 gas shielded welding (PANA-AUTO KR II 350 CO2 / MAG), select wire material H08Mn2Si, powder high carbon ferrochrome 70%-medium carbon ferromanganese 20%-medium carbon ferrosilicon 10%, ball milling composite 30min. Use CO2 gas shielded welding and jet powder feeding mechanism to weld on low carbon steel sheet, adjust current 160A, voltage 24V, powder feeding gas flow rate 5ml / min, welding speed 200mm / min, jet powder feeding angle 60°surfacing welding One layer of weld seam, and the surface of the surfacing layer obtains a Rockwell hardness of 58.

Embodiment 3

[0021] Embodiment 3: CO2 gas shielded welding (PANA-AUTO KR II 350 CO2 / MAG), select the wire material H08Mn2Si for use, take powder high-carbon ferrochrome 70%-medium carbon ferromanganese 20%-medium carbon ferrosilicon 10% as the base Powder, add 4% ferromolybdenum, 4% ferrovanadium, ball mill compound for 30min. Use CO2 gas shielded welding and jet powder feeding mechanism to weld on low carbon steel sheet, adjust current 160A, voltage 24V, powder feeding gas flow rate 5ml / min, welding speed 200mm / min, jet powder feeding angle 60°surfacing welding One layer of weld seam, and the surface of the surfacing layer obtains a Rockwell hardness of 62.

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PUM

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Abstract

The invention relates to a novel overlaying technology which finishes the processes of melting wire materials and melting and welding powder by utilizing CO2 gas shielded welding equipment and an automatic running mechanism. A composite overlaying layer is obtained by filling various kinds of powder into a molten pool under the condition of controlling the powder feeding speed, the powder granularity and the powder feeding amount by a spraying powder feeding device. By controlling an automatic running device, the welding speed is controlled at 100-500 mm/min, the spraying powder feeding speed is controlled in the adjustable range of 0-1.5kg/h, the spraying powder feeding angle is controlled at 15 degrees-75 degrees, and the spraying powder feeding distance is controlled at 3mm-20mm. The spraying wire materials are wire materials capable for being selected for CO2 gas shielded welding; the granularity range of the powder can be 60 meshes-320 meshes, and the powder can be metal powder, alloy powder, carbide, oxide or nitride ceramics; and the hardness of the overlaying layer reaches HRC30-66. The invention is applied to surface overlaying of industrial and mining materials with abrasion resistance, corrosion resistance and high temperature oxidation resistance.

Description

Technical field [0001] The invention relates to a new type of surfacing welding technology, which is used for anti-wear, anti-corrosion, anti-high temperature oxidation industrial and mining. Especially in general abrasive wear industry and mining, it can be surfacing welded on the working surface of some low carbon steel parts to improve its wear resistance and prolong its service life. Background technique [0002] In many mechanical repairs, manual arc surfacing, spraying and other methods are used to improve the service life of parts. Manual arc surfacing has low production efficiency and cannot achieve automatic welding. Oxygen-ethylene flame spray welding also has the disadvantage of low production efficiency, and at the same time, the powder deposition efficiency is low, and high melting point ceramics cannot be sprayed. Therefore, it is necessary to find a new method of automatic surfacing, high production efficiency, wide application and low production cost. Con...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/095B23K9/16
Inventor 李慕勤尹柯郭中武
Owner JIAMUSI UNIVERSITY
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