Cladding welding method applied to upright post of hydraulic support

A hydraulic support column and cladding technology, which is applied in the field of welding, can solve the problems of high cost, residual stress, and increased floating particles, and achieve the effects of short production process, environmental friendliness, and high efficiency

Active Publication Date: 2019-12-20
CHINA UNIV OF MINING & TECH
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  • Application Information

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Problems solved by technology

However, the production cycle of the alloy powder of the second representative surface repair technology is longer and the cost is higher, and defects such as microcracks, pores and residual stress will also occur during the cladding process
During the production process, the powder will increase the floating particles in the air, which will endanger the health of the operators.

Method used

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  • Cladding welding method applied to upright post of hydraulic support
  • Cladding welding method applied to upright post of hydraulic support
  • Cladding welding method applied to upright post of hydraulic support

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] In this implementation method, three technologies of electrochrome plating, laser cladding and cladding welding are used to form the protective layer (coating) on ​​the surface of the column, and its hardness, wear resistance, corrosion resistance and other performances are tested.

[0027] 27SiMn steel was chosen as the experimental substrate. 27SiMn has high strength and wear resistance, high hardenability, medium cold deformation plasticity, good cutting performance and acceptable welding performance.

[0028] The main chemical composition table of 27SiMn steel

[0029] element C Si mn Cr Ni P S content / % 0.27 1.20 1.25 ≤0.309 ≤0.30 ≤0.035 ≤0.035

[0030] The 27SiMn steel plate was cut, and the squares of 15mm×15mm×10 mm, 19mm×10mm×10 mm, and 10mm×20mm×1 mm were cut as the substrate, and then the copper-tin alloy was us...

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Abstract

The invention provides a cladding welding method applied to an upright post of a hydraulic support. The method comprises the following steps that manufacturing is carried out, and particularly, a workpiece is sleeved with an alloy pipe to be completely covered; inlaying and fusing are carried out, particularly, the alloy pipe is squeezed to be attached to the workpiece, reducing and fusing are carried out till a fusion junction boundary is generated between the alloy pipe and the workpiece, and inlaying and fusing are completed; cutting is carried out, and particularly redundant parts at the two ends of the alloy pipe are removed; and sealing and welding are carried out, and particularly the two ends of the alloy pipe are sealed and welded. According to the cladding welding method, the alloy pipe replaces electroplating solution and alloy powder to serve as a wear-resistant and corrosion-resistant material on the surface of the upright post, and the alloy pipe and base layer carbon steel are organically fused into a whole through plastic deformation generated by cold extrusion. Due to the fact that no chemical product is used in the whole production process, no pollutant is generated, and the method is completely harmless to the human body, environmentally friendly, extremely low in energy consumption, short in production process and high in efficiency and is in line with the social development theme of green production.

Description

technical field [0001] The invention relates to the field of welding, in particular to a cladding welding method applied to hydraulic support columns. Background technique [0002] The mainstream technology of the surface repair process of hydraulic support columns can be roughly divided into two generations. The first generation is electrochrome plating technology. The coating obtained by this technology can play a role in mechanical protection, but the coating is thin and prone to defects such as microcracks and pores. During use, once such microcracks or pores penetrate the coating on the surface of the column, electrochemical corrosion will form, causing the coating to bubble, peel or even fall off, thereby destroying the entire sealing ring and causing the column to fail. [0003] The second generation is laser cladding technology, and the column performance after this technology is better than that of the first generation technology. However, the production cycle of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
CPCB23P6/00Y02E30/30
Inventor 樊宇项武博张许阳孙强陈则阳张军陈正徐杰张平张金勇孙智
Owner CHINA UNIV OF MINING & TECH
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