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A kind of preparation method of microporous cemented carbide material

A cemented carbide and microporous technology, which is applied in the field of preparation of microporous cemented carbide round rods, can solve the problems that round rods are difficult to realize, and achieve the effect of uniform diameter and straight holes

Active Publication Date: 2021-03-09
ZHUZHOU XINKE HARD ALLOY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Dry-bag isostatic pressing has the advantages of high blank flatness and a wide range of product diameters. However, it is still difficult to produce round rods with micropores below 5mm in diameter by dry-bag isostatic pressing because the thin core rod cannot be removed.

Method used

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  • A kind of preparation method of microporous cemented carbide material
  • A kind of preparation method of microporous cemented carbide material

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings, so that those skilled in the art can understand the present invention.

[0028] as attached Figure 1~2 Shown, a kind of microporous cemented carbide material prepares mold, comprises: mold (1), screen cloth (2), upper plug (not shown in the figure), lower plug (3), soft core rod ( 4); Mold (1): This molding method adopts a dry bag isostatic mold, the mold size is diameter Φ (8.2 ~ 130mm) × length (200 ~ 650mm), and the mold material is rubber, plastic, polyurethane or modified polyurethane Screen cloth (2): screen cloth (2) is made up of screen cloth frame, screen cloth main body and central hole cover, and the outer diameter of screen cloth frame is consistent with die cavity size, and balance pull bar (21) is arranged on the screen cloth frame, guarantees that The screen (2) is pulled upwards smoothly, and the center hole of the screen (2) has a small round hole of 0...

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Abstract

The invention provides a method for preparing microporous hard alloy materials, comprising: step 1: preparing alloy raw materials and mixtures; step 2: selecting molds (1), screens (2) and lower plugs (3) with appropriate specifications and the soft core rod (4), first connect the end of the soft core rod (4), penetrate through the center hole of the lower plug (3), and then pass through the screen (2), and connect the screen (2) ) into the bottom of the mold cavity; Step 3: Slowly add the mixture into the mold cavity, tighten the soft core rod (4), and vibrate the mold (1) at the same time, so that the material can be evenly filled into the mold through the screen (2) At the same time, ensure that the soft mandrel (4) is in the center of the mold cavity, lift the screen (2) for a certain distance, repeat the above actions until the mold cavity is filled with the compacted mixture, and then move the soft mandrel (4) from the The upper plug is pulled out and tightened; Step 4: Dry bag isostatic pressing is used to form, and the soft core rod (4) is pulled out from the compact to obtain a pressed blank.

Description

technical field [0001] The invention belongs to the technical field of hard alloy preparation, in particular to a method for preparing a microporous hard alloy round rod. Background technique [0002] Cemented carbide is a material with high hardness, high strength and high wear resistance. It is called "industrial teeth" and has been widely used in many fields of modern industry. The material of the cemented carbide round rod itself is a composite material composed of a refractory metal compound (hard phase) and a bonding metal (bonding phase) produced by powder metallurgy. Cemented carbide rods can be widely used in various types of mechanical processing. Its main features are stable mechanical properties, high wear resistance and high impact resistance. Therefore, cemented carbide rods are mainly suitable for drills, end mills, Reamers etc. can also be used for cutting, punching and measuring tools. [0003] Among them, the cemented carbide drill bit is prone to heat an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/04B22F3/03B22F3/11C22C29/06
CPCB22F3/03B22F3/04B22F3/11C22C29/005C22C29/06
Inventor 汪中玮宋耀强
Owner ZHUZHOU XINKE HARD ALLOY
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