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Self-lubricating wear-resistant material and preparation process thereof

A technology of wear-resistant material and preparation process, which is applied in the field of self-lubricating wear-resistant material and its preparation technology, can solve the problems of discontinuity, affect service life, reduce product wear resistance, etc., and achieve self-lubricating effect and heat dissipation. good effect

Inactive Publication Date: 2021-03-30
杨洪根 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to achieve the above purpose, it can be achieved by powder metallurgy, but due to the inconsistency of the matrix of the product using powder metallurgy, etc., it seriously affects its wear resistance
It is also possible to directly realize the simultaneous appearance of graphite and cementite by casting, but there will be great technical problems in this way
In addition, there is also a graphitization annealing treatment of the cast white cast iron to partially decompose the cementite into fine graphite, which can also achieve the above purpose, such as the patent with the publication number CN1667133A, but due to the infiltration The decomposition of carbon body will reduce the wear resistance of the product and affect the service life

Method used

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  • Self-lubricating wear-resistant material and preparation process thereof
  • Self-lubricating wear-resistant material and preparation process thereof
  • Self-lubricating wear-resistant material and preparation process thereof

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "bottom", "inner" and "outer" are based on the orientation or positional relationship shown in the drawings , is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientatio...

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Abstract

The invention discloses a preparation process of a self-lubricating wear-resistant material. The preparation process comprises the following steps: heating a raw material so that the raw material forms molten iron, wherein the raw material contains carbon atoms, the carbon atoms are in a supersaturated state, then the carbon atoms in the raw material are in a local aggregation state, and part of the carbon atoms are in a free state; cooling the heated molten iron, wherein the carbon atoms are still in a supersaturated state, and the carbon atoms in a free state are preferentially separated outto form graphite; further cooling the molten iron so as to precipitate primary cementite from the raw material from which graphite is removed; enabling at least part of the primary cementite to formcementite and austenite through eutectic transformation; and further cooling the molten iron to convert the austenite into martensite. According to the preparation process, graphite, cementite and martensite are separated out at a time, meanwhile, the graphite is obtained without annealing treatment, and then the wear resistance of the wear-resistant material is not affected.

Description

technical field [0001] The invention relates to a self-lubricating wear-resistant material and a preparation process thereof. Background technique [0002] At present, in the use of wear-resistant white cast iron, in order to improve its wear resistance, the content of alloying elements is increased to increase the content of carbon compounds and to stabilize the structure of the matrix. However, the life of the above-mentioned alloying elements under dry friction or boundary friction is not very good. ideal. In order to solve this technical problem and prolong the service life of wear-resistant white cast iron, it is common practice to include free self-lubricating materials (such as graphite) in the tissue. In order to achieve the above purpose, it can be achieved by powder metallurgy, but due to the inconsistency of the matrix of the product using powder metallurgy, etc., its wear resistance is seriously affected. It is also possible to directly realize the simultaneous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/08C22C37/08C22C37/10
CPCC22C33/08C22C37/08C22C37/10
Inventor 杨洪根罗鹤林
Owner 杨洪根
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