Anti-carburizing treatment method for shaft workpieces

A treatment method and technology for shaft workpieces, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problems of increasing the surface of workpieces, corrosion of workpieces, and increasing the cost of anti-seepage agents, so as to save usage, avoid corrosion, Avoid the effects of large-area contact

Inactive Publication Date: 2021-05-28
DALIAN DEMAISHI PRECISION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the existing anti-carburization treatment methods are: (1) When using an anti-seepage agent for anti-seepage, if there are foreign objects in the tooling, direct contact with the workpiece will increase the risk of surface defects of the workpiece; (2) use an acidic anti-seepage agent During anti-seepage, the surface of the workpiece will be corroded, resulting in corrosion of the workpiece; (3) All inner hole surfaces need to be coated, and the amount of anti-seepage coating used is large, which increases the cost of anti-seepage agent

Method used

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  • Anti-carburizing treatment method for shaft workpieces
  • Anti-carburizing treatment method for shaft workpieces
  • Anti-carburizing treatment method for shaft workpieces

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Embodiment Construction

[0024] exist Figure 1 to Figure 5 In the schematic diagram of the present invention shown, the steps of the anti-carburization treatment method for shaft workpieces are as follows:

[0025] Step (1): Make the mandrel: according to the size of the blind hole of the workpiece, make a profiling mandrel, the mandrel is made of 16MnCr5 material, the outer diameter of the chamfer of the mandrel is the same as the inner diameter of the blind hole of the workpiece, and the material of the workpiece is 20CrMnTi , the surface hardness is HRC58-63, the penetration layer depth is 0.6mm, and the inner hole hardness is HRC37-43;

[0026] Step (2): washing: washing the anti-carburization area of ​​the blind hole of the workpiece with a cleaning agent, and then drying;

[0027] Step (3) Furnace loading: After the workpiece is dry, use a soft brush to evenly apply anti-seepage paint on the chamfer of the mandrel, and then install it into the blind hole of the workpiece to seal the blind hole...

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Abstract

The invention discloses an anti-carburizing treatment method for shaft workpieces. The anti-carburizing treatment method comprises the following steps of S(1) manufacturing a mandrel; S(2): carrying out washing; S(3) carrying out charging; S(4) carrying out carburizing and quenching; S(5) carrying out cleaning; S(6) carrying out tempering; and S(7) disassembling a furnace. The carburizing atmosphere can be prevented from entering an anti-seepage area, and the anti-seepage purpose is achieved; the mandrel is in direct contact with the workpiece, so that the influence of foreign matters on the appearance of the workpiece when the workpiece is in contact with a tool is avoided; the mandrel is used, so that large-area contact between anti-seepage coating and the workpiece is avoided, and the corrosion of the slightly acidic anti-seepage coating to the workpiece can be avoided; and the use amount of the anti-seepage coating can be reduced.

Description

technical field [0001] The invention relates to the field of carburizing and quenching heat treatment, in particular to the anti-carburization treatment of shaft workpieces. Background technique [0002] With the rapid development of the new energy vehicle industry, electric vehicle shaft products are widely used, and some electric vehicle shafts are very heavy, and the design of parts often pursues lightweight products to achieve optimal design. In this regard, designers often design some through-hole or blind-hole products to achieve the purpose of product lightweight. In these products, most of the inner holes of the shaft have some functional dimensions, and these dimensions are very demanding. Many of these products require carburizing and quenching heat treatment, which is quite difficult to control the size of the inner hole. Therefore, it is necessary to process the inner hole after heat treatment. [0003] This kind of inner hole is mostly processed by turning. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/04C23C8/20C21D1/18C21D9/28
CPCC23C8/04C23C8/20C21D1/18C21D9/28
Inventor 殷健骆波阳何建平
Owner DALIAN DEMAISHI PRECISION TECH CO LTD
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