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CN-224212738-U - High-wear-resistance metal casting with multidirectional stress dispersion pore channel

CN224212738UCN 224212738 UCN224212738 UCN 224212738UCN-224212738-U

Abstract

The utility model discloses a high-wear-resistance metal casting with multidirectional stress dispersion pore channels, and relates to the technical field of metal castings. The utility model comprises a metal casting body, wherein the metal casting body comprises a casting body, and the surface of the casting body is coated with a wear-resistant layer. According to the utility model, the wear-resistant performance of the metal casting is remarkably improved by constructing the multi-layer composite wear-resistant layer on the surface of the casting, the hardened metal layer is obtained by carbonitriding treatment on the surface of the casting, the hardness and wear resistance of the surface of a matrix are effectively improved, a solid foundation is laid for the whole wear-resistant layer system, the tungsten carbide alloy wear-resistant alloy layer welded on the hardened metal layer is extremely high in hardness and wear resistance, high-frequency friction and fretting wear can be resisted, the sprayed silicon carbide ceramic wear-resistant coating further enhances the hardness of the surface, good high temperature resistance and corrosion resistance are also provided for the casting, and the Teflon coating on the outermost layer can form the surface with low friction coefficient.

Inventors

  • YU LIFENG
  • JIN WEIBIAO
  • HONG HUAWEI
  • Jin Luobin
  • WANG ZHONGGANG

Assignees

  • 广德荣谐机床科技有限公司

Dates

Publication Date
20260508
Application Date
20250611

Claims (7)

  1. 1. The high-wear-resistance metal casting with the multidirectional stress dispersion pore channel comprises a metal casting body (1), and is characterized in that the metal casting body (1) comprises a casting body (11), and a wear-resistant layer (12) is coated on the surface of the casting body (11); the wear-resistant layer (12) comprises a hardened metal layer (121), a wear-resistant alloy layer (122) is welded on the surface of the hardened metal layer (121), a ceramic wear-resistant coating (123) is sprayed on the surface of the wear-resistant alloy layer (122), and a Teflon coating (124) is sprayed on the surface of the ceramic wear-resistant coating (123).
  2. 2. The high wear-resistant metal casting with the multidirectional stress dispersion pore channel as set forth in claim 1, wherein the surface and the inner cavity of the casting body (11) are provided with the multidirectional stress dispersion pore channel.
  3. 3. A metal casting with high wear resistance having multi-directional stress dispersion channels according to claim 1, wherein said hardened metal layer (121) is obtained by treating the surface of the casting body (11) by a carbonitriding process.
  4. 4. A metal casting with high wear resistance having multi-directional stress dispersion channels as described in claim 1, wherein said wear resistant alloy layer (122) is made of tungsten carbide alloy.
  5. 5. A metal casting with high wear resistance having multi-directional stress dispersion channels as described in claim 1, wherein said ceramic wear resistant coating (123) is made by spraying silicon carbide powder.
  6. 6. A metal casting with high wear resistance with multidirectional stress-dispersing channels as set forth in claim 1, wherein said Teflon coating (124) is made by Teflon spraying film, and said Teflon coating (124) is sprayed with two to three layers.
  7. 7. The metal casting with high wear resistance with multidirectional stress dispersion pore channels according to claim 1, wherein the surface of the metal casting body (1) is coated with a protective film.

Description

High-wear-resistance metal casting with multidirectional stress dispersion pore channel Technical Field The utility model belongs to the technical field of metal castings, and particularly relates to a high-wear-resistance metal casting with multidirectional stress dispersion pore channels. Background In the field of high-end equipment manufacturing, a machine tool casting is used as a core basic component, and the surface wear resistance of the machine tool casting directly determines the machining precision maintainability and the service life of the whole machine. Along with the development of advanced manufacturing technologies such as precision machining, high-speed cutting and the like, machine tool castings need to bear the synergistic effect of high-frequency friction, multidirectional fretting wear and alternating load in long-term operation, and especially in key contact positions such as guide rail pairs, bearing seat holes and the like, precision attenuation caused by surface wear has become a main bottleneck for restricting the reliability of the machine tool. Although the prior art realizes preliminary equalization of multidirectional stress through the design of inner cavity dispersion pore channels, the improvement of the surface wear resistance still faces the double challenges of material selection and coating process. The surface wear-resistant treatment of the traditional metal casting mainly depends on the hardness improvement of the matrix material or the surface hardening treatment by adopting a single process. For example, the strength of a matrix is improved by quenching and tempering, or surface strengthening such as carburizing and quenching is carried out in a local area, but the method can only improve the hardness of a surface layer in a limited way, an independent wear-resistant protection system cannot be formed, the relative sliding speed of the surface of a casting and a moving part can reach more than 50m/min in a high-speed cutting machine tool, a traditional hardening layer is easy to generate plastic deformation when the contact stress exceeds 500MPa, so that the surface layer material is peeled off, and under the heavy-load processing scene, the coupling effect of vertical load and tangential friction force can aggravate the surface microcrack expansion, so that the composite damage of abrasive particle abrasion and fatigue abrasion is formed. To this end we provide a metal casting with high wear resistance with multidirectional stress-dispersing channels to solve the above problems. Disclosure of utility model The utility model aims to provide a metal casting with high wear resistance of a multidirectional stress dispersion pore channel, and solves the problems of the prior art that the metal casting has high surface wear rate and a coating is easy to fail in the industry through the matching of a casting body and a wear-resistant layer. In order to solve the technical problems, the utility model is realized by the following technical scheme. The utility model relates to a high-wear-resistance metal casting with a multidirectional stress dispersion pore channel, which comprises a metal casting body, wherein the metal casting body comprises a casting body, the surface of the casting body is coated with a wear-resistant layer, the wear-resistant layer comprises a hardened metal layer, the surface of the hardened metal layer is welded with a wear-resistant alloy layer, the surface of the wear-resistant alloy layer is sprayed with a ceramic wear-resistant coating, and the surface of the ceramic wear-resistant coating is sprayed with a Teflon coating. The utility model is further arranged that the surface and the inner cavity of the casting body are provided with the multidirectional stress dispersing pore canal, and the surface and the inner cavity of the casting body are provided with the multidirectional stress dispersing pore canal, so that the multidirectional stress can be effectively dispersed and balanced, the stress concentration is avoided, the fatigue resistance and the structural stability of the casting are improved, and the casting can maintain good performance under the complex stress working condition. The utility model further provides that the hardened metal layer is obtained by treating the surface of the casting body through a carbonitriding process, and the hardened metal layer is obtained by treating the surface of the casting body through the carbonitriding process, so that the surface of the casting body can form a surface layer with higher hardness and wear resistance, the mechanical property of the surface of a matrix is enhanced, and a solid foundation is provided for a wear-resistant layer system. The utility model is further provided that the wear-resistant alloy layer is made of tungsten carbide alloy, and the tungsten carbide alloy has extremely high hardness and wear resistance, can effectively resist high-frequency friction and fretting wea