Glue blending granulation process for preparing hard alloy

Abstract

The invention provides a glue blending granulation process for preparing a hard alloy. The glue blending granulation process for preparing the hard alloy comprises the steps of drying, cooling, sieving and glue (wax) blending granulation on a mixed wet abrasive. The technical control contents in the various steps are illustrated in detail, the glue blending granulation process provides quality assurance for subsequent pressing and sintering of the hard alloy, the rejection rate is reduced, and meanwhile, the glue blending granulation process is also beneficial to obtaining a hard alloy body with stable mechanical properties.

Description

technical field [0001] The application relates to the field of cemented carbide preparation, and specifically relates to a rubber-mixed granulation process for cemented carbide preparation. Background technique [0002] Cemented carbide is widely used because of its excellent mechanical properties such as high hardness, wear resistance, and strength, especially as tool materials, such as turning tools, milling cutters, planers, drills, boring tools, etc. The production of the cemented carbide substrate is usually to mix the raw materials and then press and sinter them into shape. However, in the prior art for the preparation of the cemented carbide, the processing of the mixture before the pressing is often not properly handled, which is a problem for the follow-up process. to quality hazards. For example, in the hard alloy production method disclosed by the publication number CN107034407A, the mixture ball milling process cannot ensure that the mixture is evenly ground, an...

AI Technical Summary

Problems solved by technology

The production of the cemented carbide substrate is usually to mix the raw materials and then press and sinter them into shape. However, in the prior art for the preparation of the cemented carbide, the processing of the mixture before the pressing is often not properly handled, which is a problem for the follow-up process. quality risk

For example, in the hard alloy production method disclosed by the publication number CN107034407A, the mixture ball milling process cannot ensure that the mixture is evenly ground, and eventually it is easy to cause local specificity of the crystal phase after sintering and forming, resulting in under-burning, over-burning, Delamination, cracks and other defects; at the same time, the glue mixing and granulation process also has a great impact on the subsequent pressing effect. In the absence of guarantee measures for the glue mixing and granulation process, the unevenness of glue mixing and granulation will directly affect the pressing , The strength of cemented carbide after sintering is easy to produce anisotropy

The publication No. CN106367651A patent describes "a preparation method of tungsten carbide alloy mixture", which increases the control of wet grinding, drying and rubber-mixed granulation, but has limited effects on defects such as delamination and cracks in the final sintering molding