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Cylindrical surface hardening and strengthening treatment method for ultra-large piston of large oil press

A technology of strengthening treatment and hydraulic press, applied in the direction of nanotechnology for materials and surface science, metal material coating technology, nanotechnology, etc., can solve the problem that the design index and performance of the hydraulic press cannot be achieved, environmental pollution restricts the manufacturing process, and affects Problems such as the performance of the piston, to achieve the design technical performance indicators and service life requirements, uniform hardness, and the effect of processing accuracy

Inactive Publication Date: 2011-04-27
四川新吉隆环保科技有限公司
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AI Technical Summary

Problems solved by technology

Fatigue damage, workpiece deformation, surface cracks, coating peeling, peeling and other defects are difficult to overcome, which affect the performance of the piston and cannot reach the design index and performance of the hydraulic press
Moreover, problems such as electroplating's environmental pollution also restrict the manufacturing process.

Method used

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Embodiment Construction

[0015] Below in conjunction with preferred embodiment, the specific implementation mode provided according to the present invention is described in detail as follows:

[0016] A cylindrical surface hardening and strengthening treatment method for a super large piston of a large hydraulic press, the implementation steps are as follows:

[0017] (1) After the working surface of the super-large working cylinder piston of the hydraulic press is cleaned, it will contain TiO 2 , SiO 2 , graphite, Ae 2 o 2 , according to the ratio of 1:1:0.3:0.1 micron-sized powder and nano-sized powder mixed, wherein the weight ratio of various materials micron-sized powder and nano-sized powder is 4:1; The plain solution is used as the tackifier and evenly blended together. The powder and the tackifier can be uniformly sprayed on the surface of the workpiece. It is a mixed solution state. Usually the ratio of powder and tackifier is 1:3~4 (weight / volume), which can be conventionally prepared a...

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Abstract

The invention relates to a cylindrical surface hardening and strengthening treatment method for an ultra-large piston of a large oil press, comprising the steps of: (1) cleaning the running surface of an ultra-large working cylinder piston of an oil press, and then mixing micron-scale powder and nanoscale powder, which respectively comprise TiO2, SiO2, graphite and Ae2O2 according to the proportion of 1:1:0.3:0.1, wherein the weight ratio of various materials in the micron-scale powder to the various materials in the nanoscale powder is 4:1; uniformly blending the mixed powder with a methylcellulose solution, and presetting the blended mixed powder on the piston running surface to be strengthened by adopting a spraying method; and forming a uniform coating to be hardened, deepened and strengthened by laser, with the thickness of 0.05-0.15mm; (2) carrying out densely covering type deep-layer hardening and strengthening by using a TFL (Thin Film Laser)-H6000CO2 high-power laser processing machine set with the wide laser beam of 30*2mm and the effective power of 4300-5200W to realize laser hardening and strengthening to reach the effective depth of 2.2-3.0mm and the hardened layer hardness of HRC55-60; and (3) after the treatment of laser deep-layer hardening and strengthening, carrying out ground finish on the running surface of the piston to reach the machine size tolerance and precision of design paper. In the invention, the process is simple and the effect is very obvious.

Description

Technical field [0001] The invention relates to a surface hardening and strengthening treatment method for parts and components, in particular to a cylindrical surface hardening and strengthening treatment method for an extra large piston of a large hydraulic press. Background technique [0002] At present, in the heavy machinery manufacturing industry, only a few countries in the world have this technology and manufacturing capabilities for the manufacturing of large-scale hydraulic presses with a capacity of 20,000 to 80,000 tons. The super-large piston of the working cylinder of this large hydraulic press is one of the core devices. A single large piston weighs dozens of tons, especially the super-large working cylinder piston weighing over a hundred tons. Its materials are 35CrMo, 42CrMo, 45Mn, etc. Made of medium carbon alloy steel. The maximum diameter of the piston is above Φ2000mm. Due to the large size and overweight of the piston, traditional heat treatment techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B82Y30/00
Inventor 魏振华
Owner 四川新吉隆环保科技有限公司
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