Special welding electrode for surfacing and repairing broken teeth of light-load and low-speed gear

A gear and tooth breaking technology, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of reducing the quality of gear after welding, repair failure, prone to cracks on the surface of the gear, and affecting normal production, etc., to achieve Saving of raw materials and energy, ease of welding, and improvement of welding quality

Inactive Publication Date: 2012-06-13
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Broken teeth are the main form of damage to light-load and low-speed forged steel gears, especially broken teeth are generally emergencies. In the absence of spare gears, broken teeth will seriously affect normal production and bring huge economic benefits to enterprises. loss
[0004] In recent years, many companies at home and abroad have tried to repair light-load, low-speed forged steel gears with broken teeth by surfacing welding. However, since light-load

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1:

[0022] The raw materials for the drug skin are 55 kg of marble, 30 kg of fluorite, 3 kg of quartz, 6 kg of clay, 1 kg of medium-carbon ferrochrome, 1 kg of high-carbon ferromanganese, 1 kg of ferrosilicon, 1 kg of ferro-titanium, trioxide 1 kg of dilanthanum, 1 kg of nickel metal and H08A steel welding wire. First passivate ferrosilicon, medium-carbon ferrochrome and high-carbon ferromanganese, that is, heat the ferrosilicon powder and keep it at 720°C for 1 hour; heat the medium-carbon ferrochrome powder and keep it at 550°C for 1 hour; Ferromanganese powder is heated and kept at 300°C for 1 hour. Put the various raw materials of the above-mentioned drug skin into the mixer to fully mix, then add water glass binder and stir evenly, the modulus of the water glass is 2.7, and the Baume degree is 48. Extrude the above-mentioned mixed material on the H08A steel welding wire with a welding rod coating machine. The solder core was dried at 100°C. The light-l...

Example Embodiment

[0023] Example 2:

[0024] The raw materials for the drug skin are 53 kg of marble, 28 kg of fluorite, 2 kg of quartz, 5 kg of clay, 2 kg of medium-carbon ferrochrome, 2 kg of high-carbon ferromanganese, 2 kg of ferrosilicon, 2 kg of ferro-titanium, trioxide 2 kg of dilanthanum, 2 kg of nickel metal and H08A steel welding wire. First passivate ferrosilicon, medium-carbon ferrochrome and high-carbon ferromanganese, that is, heat the ferrosilicon powder and keep it at 730°C for 1 hour; heat the medium-carbon ferrochrome powder and keep it at 570°C for 1 hour; Ferromanganese powder is heated and kept at 330°C for 1 hour. Put the various raw materials of the above-mentioned drug skin into the mixer to fully mix, then add the water glass binder and stir evenly, the modulus of the water glass is 2.8, and the Baume degree is 49. Extrude the above-mentioned mixed material on the H08A steel welding wire with a welding rod coating machine. The solder core was dried at 150°C. The lig...

Example Embodiment

[0025] Example 3:

[0026] The raw materials for the drug skin are 50 kg of marble, 25 kg of fluorite, 1 kg of quartz, 6 kg of clay, 3 kg of medium-carbon ferrochrome, 3 kg of high-carbon ferromanganese, 3 kg of ferrosilicon, 3 kg of ferro-titanium, trioxide 3 kg of dilanthanum, 3 kg of nickel metal and H08A steel welding wire. First passivate ferrosilicon, medium-carbon ferrochrome and high-carbon ferromanganese, that is, heat the ferrosilicon powder and keep it at 750°C for 1 hour; heat the medium-carbon ferrochrome powder and keep it at 600°C for 1 hour; Ferromanganese powder is heated and kept at 350°C for 1 hour. Put the various raw materials of the above-mentioned drug skin into a mixer to fully mix, then add water glass binder and stir evenly, the modulus of the water glass is 3.0, and the Baume degree is 50. Extrude the above-mentioned mixed material on the H08A steel welding wire with a welding rod coating machine. The solder core was dried at 200°C. The light-loa...

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PUM

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Abstract

Disclosed is a special welding electrode for surfacing and repairing broken teeth of a light-load and low-speed gear. Chemical components of the coating of the special welding electrode in weight percent (wt %) include 50-55% of marble, 4-6% of chalk, 25-30% of fluorite, 1-3% of quartz, 1-3% of medium carbon ferrochromium, 1-3% of ferrotitanium, 1-3% of high carbon ferromanganese, 1-3% of ferrosilicon, 1-3% of lanthanum trioxide and 1-3% of metallic nickel, and a core wire is an H08A steel welding wire. The welding electrode is capable of surfacing and repairing the light-load and low-speed forged steel gear without preweld preheating or post-weld heat treatment, deposited metal has high cracking resistance, and the welding electrode is extremely convenient to use on site. The surface hardness of the repaired light-load and low-speed gear ranges from HBS (Brinell hardness scale) 200 to HBS 280, and the service life of the repaired gear is three times that of an original gear.

Description

technical field [0001] The invention relates to a welding rod, in particular to a welding rod for overlay welding. Background technique [0002] Gear is one of the most widely used parts in mechanical transmission. It not only plays an important role in products such as automobiles, tractors, machine tools, and hoisting machinery, but also uses a large amount. According to the type of material, gears mainly include forged steel, cast steel, cast iron and non-ferrous metals. Among them, forged steel is the most widely used, and gears for important purposes are usually made of forged steel. The selection of specific gear materials is mainly determined according to the size of the load, the speed of the gear and the precision requirements of the gear when the gear is working. According to the load of the gear, it is generally divided into light load, medium load and high load; according to the gear speed, it is generally divided into low-speed gear (1~9 m / s), medium-speed gea...

Claims

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Application Information

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IPC IPC(8): B23K35/22B23K35/24B23K35/40
Inventor 杨庆祥杨育林周野飞齐效文
Owner YANSHAN UNIV
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