Lubricant for hole extrusion and strengthening method thereof
A lubricant and hole extrusion technology, applied in the field of surface treatment of parts, can solve the problems of poor lubrication effect and reduce the friction between the mandrel and the hole wall, so as to improve the operability and reduce the friction.
Active Publication Date: 2022-04-19
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology
[0003] The object of the present invention is to propose a lubricant for hole extrusion and its strengthening method, which can solve the problem of poor lubrication effect in the process of large interference hole extrusion, and reduce the friction between the mandrel and the hole wall , to meet the needs of high-quality hole extrusion strengthening
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[0048] The part material of the hole to be strengthened is TB6 titanium alloy, and the hole extrusion interference is 5%.
[0049] The steps for reinforcement are as follows:
[0050] 1. Determine the type of powder material of the lubricant: select iron-based amorphous alloy;
[0051] 2. Determine the type of dispersant of the lubricant: select silicone oil as the dispersant;
[0052] 3, determine the shape of the powder particles: spherical particles, after inspection, the number of ellipsoidal or other shape particles in the randomly selected 50g of powder accounts for 10% of the total number of particles.
[0053] 4. Determine the size of the powder particles: the nominal size of the powder particles is 1μm;
[0054] 5. Lubricant preparation:
[0055] The powder is poured into the dispersant and the powder is stirred evenly with the dispersant using a blender.
[0057] The lubricant is evenly coated on the hole wall or bushing by brushing or spra...
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Abstract
The invention belongs to the technical field of parts surface treatment, and relates to a lubricant for hole extrusion and a strengthening method thereof; the lubricant is composed of amorphous or quasicrystalline alloy powder and a dispersant; the proportion of the powder and the dispersant is ( 1-50) g / ml, the shape of the powder particles is spherical or ellipsoidal, and the size is 0.1 μm to 500 μm; according to the mechanical properties of the parts to be strengthened, the present invention selects a material with higher hardness and toughness Amorphous or quasi-crystalline alloys are used as lubricant and wear-reducing particles to reduce the friction between the mandrel and the hole wall; according to the size of the interference, the size of the powder particles is selected to help reduce the friction between the mandrel and the hole wall Friction; and clarified the shape and inspection standard of powder particles, which is conducive to improving the operability of engineering applications. The invention can solve the problem of poor lubrication effect in the extrusion process of large interference holes, and reduce the pressure of The friction between them meets the needs of high-quality hole extrusion strengthening.
Description
Technical field [0001] The present invention belongs to the field of surface treatment technology of parts, relates to a lubricant for hole extrusion and a strengthening method thereof. Background [0002] Hole extrusion strengthening technology is a surface strengthening method widely used in the aviation industry, mainly used in the bolt hole, ventilation hole, connection hole, oil flinging hole, positioning hole and other hole structures of key components of aviation, through the hard mandrel squeeze hole wall, so that a certain depth of residual compressive stress layer and process hardening layer is formed around the hole, thereby improving the fatigue life of the hole. During the extrusion process, in order to prevent the mandrel from scratching or bonding with the hole wall, the surface of the hole wall or bushing is usually coated with lubricant before extrusion, so as to reduce the friction between the mandrel and the hole wall. At present, the main components of lubric...
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IPC IPC(8): C10M169/04C21D7/02C22F1/04C22F1/18C10N30/06
CPCC10M169/044C21D7/02C22F1/183C22F1/04C10M2201/05C10M2229/02
Inventor 罗学昆王欣王强宋颖刚汤智慧宇波
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS