Iron-based alloy composition for repairing middle groove and method for repairing middle groove
An iron-based alloy and repair method technology, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems affecting the structure and mechanical properties of the base material and the repair layer, the heat-affected zone of the repair area is large, and the middle part has not been found. Repair problems such as grooves, achieve the effects of low repair cost, improved comprehensive mechanical properties, excellent fusion and weldability
Active Publication Date: 2021-09-03
SHENHUA SHENDONG COAL GRP
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Problems solved by technology
[0003] At present, the repair of the middle groove is mostly completed by manual electrode surfacing or wire gas shielded surfacing, and the main problems of these processes are: the repair layer has poor wear resistance and is easy to fall off, and the heat-affected zone in the repair area is relatively small. Large, it will affect the tissue and mechanical properties of the base material and the repair layer, the repair quality is unstable, and the surface molding effect is poor, requiring workers to carefully find the worn place for repair, resulting in incomplete repair, low repair efficiency, and many safety hazards , labor-intensive
However, no special material suitable for the repair of the middle groove has been found so far
Method used
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Embodiment
[0033] Example DBT 1.2m middle tank plate repair
[0034] The iron-based alloy powder used in the embodiment comprises the following raw materials by mass percentage: 0.1% of C, 17% of Cr, 4.0% of Mn, 0.1% of Si, 4.0% of Ni, 1.75% of Mo, <0.02% of S, <0.02% of P, 0.18% of Ce, and the balance is Fe. The raw materials were ground and mixed by a powder ball mill, and ground for 4 hours to obtain a uniform powder with a particle size of 150-200 mesh.
[0035] Before surfacing welding, use a three-dimensional laser scanner to scan the parts to be repaired on the plate in the middle groove at a scanning speed of 30cm / min, and then perform automatic surfacing welding according to the scanning results.
[0036] The powder repair material is added to the powder feeder, and the powder repair material is brought to the part to be repaired on the surface of the plate in the middle groove by the powder feed gas for plasma surfacing. Surfacing welding process parameters are as follows: cl...
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Abstract
The invention provides an iron-based alloy composition for repairing a middle groove, which comprises C: 0.05-0.20%; Cr: 12-25%; Mn: 2.0-6.0%; Si: 0.05-0.25%; Ni: 2.5-6.0%; Mo: 1.0-4.0%; Ce: 0.05-0.30%; S: <0.02%; P<0.02%; The invention also provides a method for repairing the middle groove, using the iron-based alloy composition described in the invention as the repair material. The iron-based alloy composition provided by the present invention has good fusion property with the base material of the middle groove, excellent welding performance, and low cost. The comprehensive mechanical properties of the repair layer obtained by the repair method provided by the invention are significantly improved, and the service life of the middle groove can be greatly extended. Moreover, the surface is uniform and smooth, and the appearance is well formed.
Description
technical field [0001] The invention relates to the field of iron-based alloy materials, in particular to an iron-based alloy composition for repairing a middle groove and a method for repairing the middle groove. Background technique [0002] The scraper conveyor is the main transportation equipment of the comprehensive mechanized coal mining face. In addition to transporting coal, it can also be used as a push-pull support point for the moving track of the coal mining machine and the movement of the hydraulic support. The scraper conveyor is composed of a head, a tail, a motor, a transmission and a middle trough. The service life of the middle trough determines the efficiency of the entire scraper conveyor, because it mainly transports materials such as raw coal, gangue, etc. Plates and chains slide on the middle plate, the working resistance is large, and the wear problem of the middle groove and the bottom plate is prominent. [0003] At present, the repair of the middl...
Claims
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IPC IPC(8): B23K35/30B23K10/02
CPCB23K10/02B23K10/027B23K35/30B23K35/3086
Inventor 贺安民刘混田张建铭杨增福王旭东魏子良艾兵张树瑜罗剑曾小平房敏王亚
Owner SHENHUA SHENDONG COAL GRP