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Aluminizing method of alloy base material

An alloy-based, aluminized technology, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of incomplete aluminizing on the inner wall of the pipe, inability to aluminize the workpiece micro-area, and easy deformation of the workpiece. To achieve the effect of easy operation, smooth surface and simple equipment

Inactive Publication Date: 2012-07-04
HARBIN INST OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0007] In order to solve the problem that the existing traditional aluminizing process is incomplete or impossible to aluminize the special-shaped workpiece in the alloy base material and the inner wall of the pipe, the workpiece is easily deformed after aluminizing the thin plate, and the micro-area aluminizing of the workpiece cannot be carried out. And provide the method of aluminizing the alloy base material

Method used

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  • Aluminizing method of alloy base material

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specific Embodiment approach 1

[0013] Specific Embodiment 1: The method of aluminizing the alloy substrate in this embodiment is realized according to the following steps: 1. Use 800# sandpaper to pre-grind the surface of the alloy substrate, then place it in an acetone solution for ultrasonic cleaning for 2 to 6 minutes, and then add 0.1 to 0.5 g / cm 2 AlCl 3 powder or NH 4 Cl powder is coated on the surface of the alloy substrate to obtain a test piece; 2. Wrap the test piece with aluminum foil, and apply a pressure of 0-1 MPa, and then place it in a sintering furnace, in argon atmosphere, hydrogen atmosphere or vacuum 1. The aluminizing treatment is completed at a temperature of 500-1000° C. for 5 minutes to 24 hours; the thickness of the aluminum foil in step 2 is 10-200 μm; the aluminum foil coated in step 2 is 1-5 layers.

[0014] In step 1 of this embodiment, the alloy base material is Ni-based material, Fe-based material, Co-based material, Nb-based material, Ti-based material; the material is a th...

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment differs from Embodiment 1 in that step 1 is ultrasonic cleaning for 3 to 5 minutes. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Embodiment 3: This embodiment differs from Embodiment 2 in that the thickness of the aluminum foil 3 in step 2 is 20-180 μm. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention relates to an aluminizing method of an alloy base material, which is an aluminizing method. The aluminizing method solves the problems that the aluminizing on shaped work pieces and tube inner walls in the alloy base materials is incomplete or can not be realized, aluminized sheet work pieces are easily deformed, and the micro-area aluminizing can not be carried out on work pieces in the traditional aluminizing process. The aluminizing method comprises the following steps of: (1) pregrinding the alloy base material, cleaning with ultrasonic waves, and coating AlCl3 powder or NH4Cl powder to the surface of the alloy base material to obtain a test piece; (2) wrapping the test piece with aluminum foil, and carrying out aluminizing treatment to finish aluminizing. Alternatively,the aluminizing method comprises the following steps of: (1) cleaning the alloy base material with the ultrasonic waves to obtain the test piece; (2) wiping the aluminum foil by using HCl, wrapping the test piece with the aluminum foil, and carrying out aluminizing treatment to finish aluminizing. The base material aluminized by the invention can not deform, the size of the base material is unlimited, and the aluminizing on the shaped work pieces and the tube inner walls in the alloy base materials can be realized, micro-area aluminizing can be carried out to specific areas of the test piece,and the surface of the aluminized alloy base material is smooth and is not sticky to the aluminum foil.

Description

technical field [0001] The present invention relates to a process for aluminizing. Background technique [0002] At present, there are many methods of aluminizing alloy substrates (Ni-based alloys, Fe-based alloys or Ti-based alloys), such as solid powder embedding aluminizing, hot dip aluminizing, slurry aluminizing, gas aluminizing or electrolytic aluminizing. aluminum etc. [0003] Solid powder embedding aluminizing is to put the workpiece to be infiltrated and solid powder aluminizing agent into a special infiltration potting according to certain requirements, then put them into the heating furnace, heat and keep the temperature according to certain requirements, during the heating process A series of chemical reactions occur in the aluminizing agent to activate the aluminum atoms in the aluminizing agent, thereby infiltrating (diffusing) the aluminum atoms into the surface matrix of the workpiece, and forming an aluminized layer in the surface matrix of the workpiece. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/48C23C10/02
Inventor 赫晓东赵轶杰曾岗李明伟卢亮何飞史丽萍孙跃
Owner HARBIN INST OF TECH
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