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Surface hardening treatment method for main cutter board of loader shovel

A technology of hardening treatment and main knife plate, which is applied in the direction of welding medium, arc welding equipment, welding/cutting medium/material, etc., can solve the problems of low hardness of main knife plate, high use cost, short service life, etc., and achieve firm connection and stacking The effect of fast welding speed and low cost

Inactive Publication Date: 2014-08-27
柳州市柳南区旭升机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing main blade is usually made of Q345 material with a hardness of HRC20. This type of main blade has low hardness, fast wear, short service life, frequent replacement, and high cost of use.

Method used

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  • Surface hardening treatment method for main cutter board of loader shovel
  • Surface hardening treatment method for main cutter board of loader shovel
  • Surface hardening treatment method for main cutter board of loader shovel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A surface hardening treatment method for the main knife plate of the loader bucket: Surfacing welding is performed on the surface of the main knife plate of the loader bucket, so that the outer surface of the cutting edge forms a metal overlay welding layer 5 with a thickness of 3 mm and a surface hardness greater than HRC40, Such as figure 2 , image 3 As shown; the surfacing welding process adopts carbon dioxide gas shielded welding, and its welding parameters are: the welding wire material is hard alloy surfacing welding with a diameter of 1.6 mm, a carbon content of 0.3%, a chromium content of less than 5%, and a molybdenum content of less than 4%. Wear-resistant welding wire, the welding current is 220 amperes, the arc voltage is 24 volts, and the flow rate of carbon dioxide gas is 12 liters / minute; the surface of the main knife plate of the loader bucket is surfacing one by one in the direction parallel to the cutting edge.

Embodiment 2

[0017] A surface hardening treatment method for the main knife plate of the loader bucket: carry out surfacing welding on the surface of the main knife plate of the loader bucket, so that the outer surface of the cutting edge forms a metal surfacing layer with a thickness of 5 mm and a surface hardness greater than HRC40, such as figure 2 , image 3 As shown; the surfacing welding process adopts carbon dioxide gas shielded welding, and its welding parameters are: the welding wire material is hard alloy surfacing welding with a diameter of 1.6 mm, a carbon content of 0.6%, a chromium content of less than 5%, and a molybdenum content of less than 4%. Wear-resistant welding wire, the welding current is 240 amperes, the arc voltage is 26 volts, and the flow rate of carbon dioxide gas is 16 liters / minute; the surface of the main knife plate of the loader bucket is surfacing one by one in a direction parallel to the cutting edge.

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Abstract

The invention discloses a surface hardening treatment method for a main cutter board of a loader shovel and relates to the technical field of construction machinery production. The surface hardening treatment method includes steps of surfacing the surface of the main cutter board of the loader shovel so as to form a metal surfacing layer with the thickness 3-5mm and surface hardness larger than HRC40 (Rockwell hardness 40) on the outer surface of a cutting edge. The surface process adopts carbon dioxide arc welding. The welding parameters include that welding wire materials are hard alloy surfacing wear-resistant welding wires with the diameter 1.6mm, carbon content 0.3-0.6%, chromium content smaller than 5% and molybdenum content smaller than 4%, the welding current is 220-240 amperes, arc voltage is 24-26 volts, and carbon dioxide gas flow is 12-16 liters per minute. Compared with the prior art, by the surface hardening treatment method, surface hardness of the main cutter board is improved, the integral strength of the main cutter board is kept, service life of the main cutter board is prolonged, and cost is low.

Description

technical field [0001] The invention relates to the technical field of construction machinery manufacturing, in particular to a surface hardening treatment method for a main blade of a loader bucket. Background technique [0002] The loader bucket is mainly used for shoveling bulk materials such as ore, soil, coal, and iron slag. Such as figure 1 , figure 2 The bucket shown is welded by main blade 4, side wall 1, arc-shaped bucket wall 2 and support plate 3. During the process of scraping materials, the bucket relies on the main blade to scrape the material into the bucket. Direct contact with the material produces friction and collision, and its cutting edge wears quickly. The existing main cutter board is usually made of Q345 material with a hardness of HRC20. This kind of main cutter board has low hardness, fast wear, short service life, frequent replacement and high use cost. Contents of the invention [0003] The technical problem to be solved by the present inve...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K35/24B23K35/36
CPCB23K9/042B23K9/16
Inventor 李宇
Owner 柳州市柳南区旭升机械厂
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