Hard alloy extrusion forming agent, preparation method thereof and application of hard alloy extrusion forming agent in extrusion production

Abstract

The invention discloses a hard alloy extrusion forming agent, a preparation method thereof, and application of the hard alloy extrusion forming agent in extrusion production. The hard alloy extrusion forming agent comprises the following components in percentage by weight: 60 to 85 percent of a solvent namely ethylene glycol diacetate, 10 to 30 percent of a bonding agent namely ethyl cellulose and 5 to 10 percent of a surface active agent namely fatty alcohol-polyoxyethylene ether. The preparation method of the hard alloy extrusion forming agent comprises the steps of blending, mixing, heating and stirring materials. The application of the hard alloy extrusion forming agent in extrusion production of a hard alloy comprises the following steps of: blending materials, and performing ball milling on 0.8 to 3.0 weight percent of a plasticizer namely polyethylene glycol stearate and the balance of a hard alloy raw material; drying and granulating to obtain a mixture containing the plasticizer; mixing 5 to 7 weight percent of a forming agent with the mixture to obtain an extrusion feeding material; extruding a blank; drying to remove the solvent in the forming agent; curing the blank, and fixing the length of the blank through semi-finishing to form a semi-finished product; and sintering to obtain a finished product. By adopting the hard alloy extrusion forming agent, the qualified rate and labor efficiency of a product are improved, the cost is reduced, the localization, safety and environmental friendliness of raw materials are achieved, and the operating environment is improved.

Description

technical field [0001] The invention relates to powder metallurgy molding technology, in particular to a molding agent for cemented carbide extrusion production, a preparation method thereof, and an application in extrusion production. Background technique [0002] Powder Extrusion Molding (PEM) is a new technology developed on the basis of metal casting billet and extrusion process of high polymer processing. Extrusion molding is formed by compressing loose powder and then stretching rheology, which is one of the fields with high technical content in the production of cemented carbide. Extrusion molding can produce special-shaped parts with equal cross-section and unlimited length. It has irreplaceable molding in cemented carbide printing needles, miniature twist drills for drilling printed circuit boards, and rods with internal spiral coolant holes. Advantage. [0003] The extrusion process of powder mixture requires the use of binders and other types of additives, that ...

AI Technical Summary

Problems solved by technology

However, there is no plasticizing component in the formula, the extrusion pressure is high, the material is easy to oxidize and difficult to preserve, and mass production cannot be realized

Tetrahydronaphthalene volatilizes quickly in the product, which is easy to cause cracks in the product during the drying process

Tetralin has no domestic products, the import price is expensive and the supply affects the production schedule

Tetrahydronaphthalene is moderately toxic and harmful to the health and safety of workers