Heat-resisting and wear-resisting iron-based self-lubricating material

Abstract

The invention discloses a heat-resisting and wear-resisting iron-based self-lubricating material. 100 to 200 meshes of reduction iron powder, 200 to 400 meshes of electrolytic copper powder, 200 to 400 meshes ball-milling chromium powder, 200 to 400 meshes of electrolytic manganese powder, 200 to 400 meshes of reduction molybdenum powder and 4 to 8-micron-order of reduction cobalt powder are weighed; pure graphite powder is analyzed; colloid molybdenum disulfide powder and other heat-resisting lubricants and superfine abrasion-resistant alloy component powder are prepared. According to the degree of oxidation of the above powder, the powder needs to be subjected to reduction treatment if necessary, mixing is conducted afterwards, after various powder except for graphite powder is mixed in a drying mode for 6-10 hours when mixing is conducted, then graphite powder is added, and wet mixing is conducted with ethyl alcohol, and the mixing process is finished after vacuum drying is conducted. The mixed powder is put into a combined die, electric spark sintering is conducted, and the heat-resisting and wear-resisting iron-based self-lubricating material is obtained. Full compactness of the material is achieved through the electric spark sintering, and density uniformity of products with the larger size is guaranteed. The heat-resisting and wear-resisting iron-based self-lubricating material still has excellent friction resistance performance at 400 DEG C, the friction factor is low, wear is small, heat resistance is good, and the material can be used for various high-temperature service machines and devices.

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials, in particular to a heat-resistant and wear-resistant iron-based self-lubricating material. Background technique [0002] Solid self-lubricating composite materials include plastic base, metal base and ceramic base. Plastic-based composites have a low coefficient of friction, but they are limited to the characteristics of plastics, and the service temperature is not high; ceramic-based and cemented carbide-based composites, although they have a high service temperature, have high hardness, and the materials that form frictional pairs with them are limited. At the same time, the cost is high; metal-based composite materials, including nickel and cobalt-based materials, can obtain better heat-resistant and wear-resistant self-lubricating properties, but the cost is high; and copper-based self-lubricating materials, the use of temperature, speed and allowable load low and limited. ...

AI Technical Summary

Problems solved by technology

Plastic-based composites have a low coefficient of friction, but they are limited to the characteristics of plastics, and the service temperature is not high; ceramic-based and cemented carbide-based composites, although they have a high service temperature, have high hardness, and the materials that form frictional pairs with them are limited. At the same time, the cost is high; metal-based composite materials, including nickel and cobalt-based materials, can obtain better heat-resistant and wear-resistant self-lubricating properties, but the cost is high; and copper-based self-lubricating materials, the use of temperature, speed and allowable load low and limited