Process method for treating 65Mn steel material through ECAE (Equal Channel Angular Extrusion)

A process method and technology of process steps, applied in the field of material processing for agricultural machinery, can solve the problems of unreachable, reduced friction and wear performance, poor toughness of surface materials, etc., and achieve improved performance, improved material structure, and improved microhardness. Effect

Inactive Publication Date: 2017-01-04
HENAN AGRICULTURAL UNIVERSITY
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  • Abstract
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Problems solved by technology

The above methods have improved the strength and hardness of the surface material to a certain extent, and improved its surface wear resistance, but these surface treatment methods have disadvantages such as unstable treatment effect, inconsistent structure of the surface layer and the matrix material, and poor toughness of the surface material. , can not achieve the desired effect
At the same time, since the above methods are all treated on the surface of the material, when the wear resistance of the surface layer is reduced or the surface layer is worn through, its friction and wear performance will decrease sharply.

Method used

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  • Process method for treating 65Mn steel material through ECAE (Equal Channel Angular Extrusion)
  • Process method for treating 65Mn steel material through ECAE (Equal Channel Angular Extrusion)
  • Process method for treating 65Mn steel material through ECAE (Equal Channel Angular Extrusion)

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Embodiment Construction

[0038] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention are taken as an example and described in detail below with reference to the accompanying drawings.

[0039] The processing steps of the preferred embodiment include:

[0040] Cut the 65Mn steel material into a cuboid with a size of 100 mm×9.9 mm×9.9 mm with a plasma cutting machine, chamfer the cuboid obtained after cutting, grind and polish with a grinder after chamfering, and scrub the surface with acetone , coated with a glass lubricant after scrubbing to obtain a blank;

[0041] The prepared billet was kept at 850°C for 20 minutes;

[0042] Molybdenum disulfide lubricant is coated on the inner surface of the first mold, and the first mold is placed at 600 ° C for 1 hour for preheating, wherein, such as figure 1 As shown, the first mold 1 has a vertical entry channel 11 and a horizontal extrusion chan...

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Abstract

The invention discloses a process method for treating a 65Mn steel material through ECAE (Equal Channel Angular Extrusion). The material is subjected to extrusion treatment by adopting a specific process and utilizing a plurality of moulds, so that original pearlite structures in the material are plastically deformed greatly; cementite structures in pearlites are damaged; cementites are uniformly dissolved in an ultrafine grain ferrite substrate structure; finally, an equiaxial ultrafine grain structure is formed. The material structure is improved, the performance is improved, and the material is more applicable to agricultural mechanical tillage and soil preparation machines.

Description

technical field [0001] The invention relates to the technical field of material processing for agricultural machinery, in particular to an ECAE processing method for 65Mn steel materials. Background technique [0002] 65Mn steel material has the advantages of high hardness, good hardenability, less decarburization tendency, low price, and good machinability, etc. Soil cultivation provides a good soil environment for crop production. However, due to the direct action on the soil, the working environment conditions are relatively poor, and the wear is serious. It is still necessary to replace a large number of wear parts every year, and the manufacturing cost is high. [0003] The strength, toughness and hardness of the 65Mn steel matrix material not only affect the mechanical properties of the material, but also are the decisive factors to improve its friction and wear performance. Many researchers at home and abroad have carried out a variety of treatment methods to improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/00
CPCB21C23/001B21C23/002B21C23/004
Inventor 王小飞余泳昌安雪李宁张帅军
Owner HENAN AGRICULTURAL UNIVERSITY
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