Process of surfacing silicon-copper alloy on carbon steel and piston-cylinder unit of surfacing support ring

Abstract

The invention discloses a piston-jar unit of a surfacing support ring, including a jar body, a piston built in the jar body and reciprocated along the self axial direction, and a piston seal ring for sealing a gap between a piston outer wall and a jar body inner wall is sleeved out of an excircle of the piston, which is characterized in that a first groove is arranged along circumference on the excircle surface of the piston, a piston support ring is surfaced in the first groove, the piston support ring and the piston are coaxially arranged, a work surface of the piston support is in clearance fit with corresponding supported surface, the piston support ring is made of copper silicon alloy, the copper silicon alloy contains 2.5-3.1 wt% of silicon element and copper element not less than 96 wt%, and balance of impurity element which includes aluminum element accounting for 0.0015%-0.01% in the copper silicon alloy by weight. The piston-cylinder unit is easy to process and assemble; when in use, welding slag and dust are not easy to enter the matched surfaces between the cylinder body and the piston and between the piston and a piston rod, so that the sealing effective period is long, the wear resistance is good, the operation is stable, the phenomena of cylinder scuffing and blockage are not easy to occur, the problem that the environment has great impact on the service life of a fluid pressure actuation mechanism is effectively solved, and the piston-cylinder unit is particularly applicable to liquid pressure actuation mechanisms.

Description

technical field [0001] The invention relates to a welding process, in particular to a process for overlaying silicon-copper alloy on the surface of carbon steel, and a piston-cylinder unit for overlaying a supporting ring. Background technique [0002] The development of modern industry puts forward higher and stricter requirements on the performance of welded components. Such as high temperature strength, wear resistance, corrosion resistance, low temperature toughness, etc. Under this premise, it is impossible for any single material to fully meet the requirements for the use of integral welded components. Fusion welding of dissimilar materials has become a breakthrough direction to solve this problem. Surfacing welding technology has the advantages of low cost and easy operation, and is widely used in the field of dissimilar material welding. [0003] As we all know, the properties of dissimilar materials are quite different, and defects such as cracks and pores are pr...

AI Technical Summary

Problems solved by technology

[0005] Eliminating the residual stress in the transition zone of the weldment, improving the toughness of the transition zone, reducing crack sensitivity, and improving the bonding performance between the substrate and the metal of the surfacing layer are issues that need to be considered in the surfacing process, and the same surfacing process is applied to Different dissimilar materials cannot achieve the ideal welding effect

[0006] At present, there is no report about the overlay welding of silicon-copper alloy on the surface of carbon steel

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