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Method of rasing wearability of mechanical element

A technology of mechanical parts and wear resistance, which is applied in the field of manufacturing and processing of easy-to-wear mechanical parts. It can solve the problems of limited surface hardness of engineering materials, loss of protection of mechanical parts, and reduced effectiveness of mechanical parts, so as to achieve reliable performance and low cost. , processing simple effect

Inactive Publication Date: 2004-07-21
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of these methods are to treat the entire surface, the treatment period is long, and the thickness of the hardened layer is relatively thin, which is often worn away quickly in service, losing the protective effect on the mechanical parts themselves, and reducing the mechanical parts in various applications. Effectiveness for use under operating conditions
Moreover, the improvement of the surface hardness of engineering materials is also limited

Method used

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  • Method of rasing wearability of mechanical element
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  • Method of rasing wearability of mechanical element

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Manufacture of die-casting machine parts with spherical crowns on the surface - punches. refer to figure 1 , the distribution form of the convex units of the spherical crown is: the diameter of the spherical crown bottom circle is 3 mm, the height of the spherical crown is 0.1 mm, and the spherical crown units are distributed in a rectangular lattice with a center distance of 6 to 9 mm. And the rectangle edge of the lattice is at a 45° angle to the axis of the component, the material is QT600~2, the hardness of the component matrix is ​​HB190~210, and the hardness of the spherical crown convex unit after treatment is HB420~450; the auxiliary cylinder liner is surface infiltration Nitrogen treatment, hardness HB470-500. The ratio of the sum of the projected area of ​​the spherical cap unit on the surface to the surface area is 32.7%. The parts treated with the bionic non-smooth surface and the untreated parts work under the same conditions, and the service life of the m...

Embodiment 2

[0022] Manufacture die-casting machine parts with grid-like protrusions on the surface - punches. refer to figure 2 , the grid-like non-smooth shape can be regarded as a strip-shaped convex unit composed of multiple spherical caps. The non-smooth surface is composed of grid-like units with a grid width of d=2mm and a grid height of h=0.15mm. The grid units are arranged in a square with a grid spacing of 10mm (calculated from the center). The material is QT600-2, the hardness of the ductile iron itself is HB190-210; the hardness of the grid unit after treatment is HB420-450; the auxiliary cylinder liner is surface nitriding treatment, and the hardness is HB470-500. The ratio of the sum of the projected area of ​​the grid unit body on the surface to the surface area is 25.6%. The parts treated with bionic non-smooth surface and the untreated parts work under the same conditions, and the service life of the auxiliary cylinder liners is the same. The coefficient is reduced by 2...

Embodiment 3

[0024] The manufacturing surface has another kind of grid-like raised die-casting machine part - the punch. refer to image 3 , the design method can design the grid-like non-smooth shape into a diamond shape, the grid width is d=2mm, the grid height is h=0.15mm, the grid spacing is 6mm (calculated based on the center), and the material is QT600-2. The hardness of the ductile iron itself is HB190-210; the hardness of the mesh unit after treatment is HB370-400; the auxiliary cylinder liner is surface nitriding treatment, HB450-490. The ratio of the sum of the projected area of ​​the mesh unit body on the surface to the surface area is 35.9%. The parts treated with bionic non-smooth surface and the untreated parts work under the same conditions, and the service life of the matching and auxiliary cylinder liners is the same. The coefficient was reduced by 23%, while the lifetime of parts with biomimetic non-smooth surfaces was 5.1 times that of untreated parts. 14% higher cost ...

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Abstract

A method for improving the antiwear performance of mechanical part features that the spherical, scale-shaped, latticed, or fringed lug units are made on anti wear surface to be rubbed by a certain density and a certain height, and the hardness difference between said mechanical part and lug unit is HB 0-200.

Description

technical field [0001] The invention relates to the manufacturing and processing technology of easy-to-wear mechanical parts in relative motion, in particular to a method for improving the wear resistance of the surface thereof. Background technique [0002] The wear and tear produced when various mechanical parts move relative to each other (such as sliding, rotating, rolling, etc.) is one of the main reasons for their failure. At home and abroad, in addition to seeking new anti-wear materials, adding lubricating materials and rationally designing the structure, surface hardening (surface modification) is an important method to improve the quality of mechanical parts, prolong service life and improve performance. At present, the commonly used surface hardening techniques include chemical, laser, electron beam heat treatment, surfacing, spraying, deposition, coating and so on. Most of these methods are to treat the entire surface, the treatment period is long, and the thick...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/00F16C3/06
CPCB23K26/0078F16C3/06B23K26/3584
Inventor 任露泉周宏邱小明刘庆萍崔占荣韩志武张桂兰李建桥佟金钱延春赵宇光
Owner JILIN UNIV
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