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Ferrous alloy spray welding repair material for wagon wheel and repair method thereof

A technology of spray welding repair material and railway freight car, which is applied in the direction of metal material coating process, melting spray plating, coating, etc., can solve the problems of high scrapping speed of wheels, re-replacement of wheels, increase in maintenance cost of railway freight cars, etc. The effect of wide control range, enhanced anti-oxidation and slagging ability

Active Publication Date: 2014-03-26
CRRC YANGTZE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For wheels with excessive wear, the thickness of the rim is generally used as the basis for judging whether the wheel can continue to be used. If the thickness of the rim is reduced to the set limit value (usually required to be ≥ 28mm), it is no longer possible to use mechanical processing methods. To be repaired, it must be scrapped directly, and the wheel needs to be replaced
Like this, it is bound to cause the wheel to be scrapped quickly, and the maintenance cost of railway wagons continues to increase.

Method used

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  • Ferrous alloy spray welding repair material for wagon wheel and repair method thereof
  • Ferrous alloy spray welding repair material for wagon wheel and repair method thereof
  • Ferrous alloy spray welding repair material for wagon wheel and repair method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A railway freight car wheel 1 to be repaired, its structure is as follows figure 1 As shown, its steel grade is ZL-B, and its chemical composition weight percentages are tested as follows: C: 0.57%, Si: 0.16%, Mn: 0.60%, P: 0.035%, S: 0.040%. The components of the iron-based alloy repair material used for railway freight car wheels are calculated by weight percentage: C: 0.3%, Ni: 13.6%, Cr: 15.8%, B: 1.2%, Si: 2.9%, the balance is Fe And inevitable impurities.

[0025] The method for repairing railway freight car wheels using the iron-based alloy spray welding repair material includes the following steps:

[0026] 1) Remove a wheel 1 to be repaired from the railway freight car bogie that has been worn and entered into the maintenance period. Check that the rim thickness d of the wheel 1 to be repaired is 28.5mm, and its thickness has not been worn down to the set value. Limit value

[0027] 2) Clean the wheel tread 1a and the inner side 1b of the wheel flange;

[0028] 3) Us...

Embodiment 2

[0036] A wheel steel grade to be repaired is ZL-B, and its chemical composition weight percentages are: C: 0.67%, Si: 0.20%, Mn: 0.85%, P: 0.03%, S: 0.030%, the selected railway freight car The components of the iron-based alloy repair material for wheels are calculated by weight percentage: C: 0.5%, Ni: 16%, Cr: 18, B: 2.0%, Si: 5%, the balance is Fe and unavoidable impurities;

[0037] Use the above-mentioned iron-based alloy spray-welded repair material on railway freight car wheels (its structure is as figure 1 Shown) The repair method includes the following steps:

[0038] 1) Remove a wheel 1 to be repaired that has entered the overhaul period from the railway freight car bogie, and check that the rim thickness d of the wheel 1 to be repaired is 30mm, and its thickness has not been worn down to the set limit value;

[0039] 2) Clean the wheel tread 1a and the inner side 1b of the wheel flange;

[0040] 3) Using the powder plasma high temperature spray welding process, the above ...

Embodiment 3

[0047] The steel grade of a wheel to be repaired is ZL-B, and its chemical composition weight percentage is: C: 0.60%, Si: 0.21%, Mn: 0.70%, P: 0.02%, S: 0.02%. The railway freight car used The components of the iron-based alloy repair material for wheels are calculated by weight percentage: C: 0.4%, Ni: 14%, Cr: 14, B: 1.5%, Si: 3%, the balance is Fe and inevitable impurities;

[0048] 1) Remove a wheel 1 to be repaired from the railway freight car bogie that has been worn and entered into the maintenance period. Check that the rim thickness d of the wheel 1 to be repaired is 29.6mm, and its thickness has not been worn down to the set value. Limit value

[0049] 2) Clean the wheel tread 1a and the inner side 1b of the wheel flange;

[0050] 3) Using the powder plasma high temperature spray welding process, the above iron-based alloy spray welding repair material is uniformly deposited on the wheel tread 1a and the inner side of the rim 1b, and the thickness of the deposited part re...

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Abstract

The invention discloses a ferrous alloy spray welding repair material for a wagon wheel and a repair method thereof. The repair material contains the following components by weight: 0.1-0.5% of C, 11-16% of Ni, 12-18% of Cr, 1.0-2.0% of B, 1-5% of Si, and the balance being Fe and inevitable impurities. The repair method comprises the following steps of: (1) inspecting whether thickness of a wheel rim to be repaired is abraded and thinned to be a set limiting value; (2) selecting a wheel to be repaired of which the thickness of the wheel rim is not abraded and thinned to the set limiting value, and cleaning the wheel tread and the internal side of the wheel rim according to a spray welding requirement; (3) using a powder plasma high temperature spray welding technology, and uniformly depositing a ferrous alloy spray welding repair material on the wheel tread and the internal side of the wheel rim; and (4) repairing the wheel tread and the internal side of the wheel rim by machining. Proved by practices, the wheel repaired by the alloy spray welding repair material is matched to combination mechanical properties, and the repair method has advantages of simple operation and low energy consumption.

Description

Technical field [0001] The invention relates to a railway freight car wheel repair technology, in particular to a railway freight car wheel iron-based alloy spray welding repair material and a repair method thereof. Background technique [0002] With the rapid development of railway freight cars to heavy loads, the requirements for inspection and repair of freight cars' wheels have become higher and higher, resulting in a significant increase in the cost of inspection and repair of factory wheels. In recent years, the weight-reducing wheels that have been widely used in order to increase the speed of railway transportation have entered the factory repair period. The thickness of the rim of the weight-reducing wheels has been reduced by about 15mm compared with the original ordinary wheels. The service cycle is obvious. shorten. In addition, when the vehicle is running at a heavy load and high speed, the amount of wheel wear and defects are increased, resulting in a large increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/134
Inventor 乐汉琴江锐锋左云清武永亮王文峰
Owner CRRC YANGTZE CO LTD
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