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Additive Manufacturing Method for Piston Rod Surface

A technology of additive manufacturing and piston rod, applied in the direction of metal material coating process, coating, etc., can solve the problems of no detailed introduction, few reports of additive manufacturing, etc., achieve good economic and social benefits, small processing volume, good wear resistance

Active Publication Date: 2018-06-19
SHANGHAI SSOEC MARINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Although the additive manufacturing technology is widely used, there are few reports on the additive manufacturing on the surface of the piston rod, especially the use of the additive manufacturing technology to greatly improve the wear resistance and corrosion resistance of the piston rod surface. introduce

Method used

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  • Additive Manufacturing Method for Piston Rod Surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The additive manufacturing method on the surface of the piston rod is characterized by laser cladding. On the piston rod body 1, the laser cladding corrosion-resistant steel layer 2 and the wear-resistant and corrosion-resistant alloy layer 3, the specific preparation process steps are:

[0031] ①Laser cladding a layer of corrosion-resistant steel 2 on the surface of alloy steel 42CrMo piston rod base material. The thickness of corrosion-resistant steel 2 is 0.52mm. The chemical composition and mass fraction of corrosion-resistant steel 2 are: 0.06%C, 26.93%Cr , 5.51%Mn, 2.64%Si, 19.72%Ni, 8.52%Mo, 0.29%N, 5.42%Nb, 0.019%S, 0.023%P, the balance Fe, the power of laser cladding corrosion-resistant steel is 2.5KW;

[0032] ②Continue to laser clad a layer of wear-resistant and corrosion-resistant alloy layer 3 on the corrosion-resistant steel 2 in step ①, the thickness of the wear-resistant and corrosion-resistant alloy layer 3 is 3.30mm, the chemical composition and mass fr...

Embodiment 2

[0034] The additive manufacturing method on the surface of the piston rod is characterized by laser cladding. On the piston rod body 1, the laser cladding corrosion-resistant steel layer 2 and the wear-resistant and corrosion-resistant alloy layer 3, the specific preparation process steps are:

[0035] ①Laser cladding a layer of corrosion-resistant steel 2 on the surface of alloy steel 40Cr piston rod base material. The thickness of corrosion-resistant steel 2 is 0.87mm. The chemical composition and mass fraction of corrosion-resistant steel 2 are: 0.12%C, 28.35%Cr , 6.80%Mn, 2.29%Si, 18.29%Ni, 8.08%Mo, 0.38%N, 5.07%Nb, 0.020%S, 0.025%P, the balance Fe, the power of laser cladding corrosion-resistant steel is 3.2KW;

[0036] ②Continue to laser clad a layer of wear-resistant and corrosion-resistant alloy layer 3 on the corrosion-resistant steel 2 in step ①. The thickness of the wear-resistant and corrosion-resistant alloy layer 3 is 2.83mm. The chemical composition and mass frac...

Embodiment 3

[0038] The additive manufacturing method on the surface of the piston rod is characterized by laser cladding. On the piston rod body 1, the laser cladding corrosion-resistant steel layer 2 and the wear-resistant and corrosion-resistant alloy layer 3, the specific preparation process steps are:

[0039] ①Laser cladding a layer of corrosion-resistant steel 2 on the surface of carbon steel Q345 piston rod base material. The thickness of corrosion-resistant steel 2 is 0.71mm. The chemical composition and mass fraction of corrosion-resistant steel 2 are: 0.09%C, 27.66%Cr , 5.94%Mn, 2.50%Si, 18.98%Ni, 8.29%Mo, 0.34%N, 5.31%Nb, 0.021%S, 0.023%P, the balance Fe, the power of laser cladding corrosion-resistant steel is 2.8KW;

[0040] ②Continue to laser clad a wear-resistant and corrosion-resistant alloy layer 3 on the corrosion-resistant steel 2 in step ①. The thickness of the wear-resistant and corrosion-resistant alloy layer 3 is 2.99 mm. The chemical composition and mass fraction of...

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Abstract

The invention relates to the technical field of preparation of metal materials, and particularly relates to a manufacturing method of an additive on the surface of a piston rod. A laser cladding method is used to clad a corrosion resistant steel layer on a piston rod body, the thickness of the corrosion resistant steel is 0.50-0.88 mm, the laser cladding power is 2.5-3.2 KW, and then a wear resistant and corrosion resistant alloy layer is continuously cladded on the surface of the corrosion resistant steel layer; and the thickness of the wear resistant and corrosion resistant alloy layer is 2.80-3.35 mm, the laser cladding power is 1.8-2.2 KW, and then the product is subjected to finish machining to the given size and accuracy, so that the surface wear resistance and corrosion resistance piston rod is obtained. According to the method, the piston rod is prepared through laser-cladding of the additive, the efficiency is high, the surface finish amount of the piston rod is low, the surface hardness of the piston rod is more than or equal to 55 HRC, and the salt-spray corrosion resistance of the surface of the piston rod is more than or equal to 2000 h. The wear resistance of the piston rod is high, the service life is prolonged by 280-350% as compared with the common carbon steel piston rod, and is prolonged by 220-260% as compared with the common alloy steel piston rod, and the manufacturing method has excellent economic and social benefits after popularization and application.

Description

technical field [0001] The invention relates to the technical field of metal material preparation, in particular to an additive manufacturing method for the surface of a piston rod. Background technique [0002] The piston rod is a connecting part that supports the work of the piston. Most of them are used in the cylinder and cylinder motion actuators. It is a moving part with frequent movements and high technical requirements. Taking the hydraulic cylinder as an example, it consists of cylinder barrel, piston rod (cylinder rod), piston and end cover. The quality of its processing directly affects the life and reliability of the entire product. The processing requirements of the piston rod are high, and the surface roughness requirement is Ra0.4~0.8um, and the requirements for coaxiality and wear resistance are strict. The piston rod usually adopts a rolling process to improve the corrosion resistance of the surface, and can delay the generation or expansion of fatigue cra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/34C22C38/44C22C38/48C22C38/02C22C38/50C22C38/54C23C24/10
CPCC22C38/001C22C38/002C22C38/005C22C38/02C22C38/34C22C38/44C22C38/48C22C38/50C22C38/54C22C38/58C23C24/103
Inventor 卞伟林周敏蒋逸君
Owner SHANGHAI SSOEC MARINE ENG CO LTD