Preparation process of iron-based powder sintered material

Abstract

The invention discloses a preparation process of an iron-based powder sintered material. The preparation process comprises the following steps of: S1, obtaining an iron-based material, a lubricant, alloy powder and machinability improving powder, and mixing the iron-based material, the lubricant, the alloy powder and the machinability improving powder in a mixing device to obtain mixed powder; S2, filling a mold with the mixed powder, and pressing the powder at a temperature lower than 100 DEG C for molding; and S3, sintering the obtained molded body to obtain the iron-based powder sintered material. In the preparation process, a stirring rod is driven to rotate by a second driving motor to mix and stir the iron-based material, the lubricant, the alloy powder and the machinability improving powder, and meanwhile, a turntable is driven to drive a sliding block to rotate by a first driving motor, and the sliding block slides in a sliding groove to drive a strip-shaped plate to reciprocate in the horizontal direction, so that the stirring rod stirs and mixes the mixed powder at the edge and the middle of a stirring barrel more comprehensively and more fully, and the mixed powder is stirred more uniformly.

Description

technical field [0001] The invention relates to the technical field of preparation of iron-based powder sintered materials, in particular to a preparation process of iron-based powder sintered materials. Background technique [0002] Iron-based powder generally refers to iron-based alloy powder. The powder is made by adjusting the Ni and Cr content of 18-8 or Cr13 stainless steel and adding B and Si elements. The hardness and compactness of the sprayed coating of iron-based alloy powder , The bonding strength is roughly equivalent to the nickel-based alloy powder coating, and the iron-based alloy powder coating has good wear resistance. [0003] In the preparation process of iron-based powder sintered materials, it is necessary to mix various raw materials for preparing iron-based powder sintered materials. Most of the existing mixing methods are to put several kinds of powders into the mixing tank for stirring and mixing. However, the existing In the stirring and mixing de...

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Problems solved by technology

[0003] In the preparation process of iron-based powder sintered materials, it is necessary to mix various raw materials for preparing iron-based powder sintered materials. Most of the existing mixing methods are to put several kinds of powders into the mixing tank for stirring and mixing. However, the existing In the stirring and mixing device, the stirring rod is generally set in the middle of the mixing barrel. Under the action of centrifugal force, part of the powder is attached to the wall of the mixing barrel. This part of the powder is mixed unevenly, which affects the quality of the mixed powder.

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