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Composite body

A composite and integral technology, applied in the field of composites, can solve the problems of low bonding strength and achieve the effect of high bonding strength and high adhesion

Inactive Publication Date: 2012-12-19
TUNGALOY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these bonding methods, the intermediate layer made of metal foil is thick, and therefore, there is a problem that the bonding strength between the cBN sintered body and the base material is low

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] A disc-shaped cBN sintered body having a diameter of 30 mm and a thickness of 1.5 mm having the composition shown in Table 1 and a disc-shaped cemented carbide having a diameter of 30 mm and a thickness of 3.0 mm having the composition shown in Table 2 were prepared. Use diamond abrasive grains, etc., to mirror-polish the joint surfaces of all samples, and then place them in acetone for 10 minutes of ultrasonic cleaning. Then, the joint surface of the cBN sintered body and the cemented carbide joint surface were overlapped by a hot press device, and the load shown in Table 3 was applied, and the temperature was raised from room temperature to the joining temperature shown in Table 3 in a vacuum, Then, the bonding pressure, bonding temperature, and holding time shown in Table 3 were maintained, and then cooled. After cooling, the applied load was removed to obtain a composite body in which cBN sintered body and cemented carbide were joined.

[0021] Table 1

[0022] ...

Embodiment 2

[0032] Prepare a binding phase of cBN-40 mass % with a composition of 60 mass % (the composition of the binding phase: TiN, Al 2 o 3 , AlN) disc-shaped cBN sintered body with a diameter of 30mm and a thickness of 1.5mm, and a metal phase with a composition of 89% by mass of WC-11% by mass (composition of the metal phase: 95% by mass of Co-4% by mass W-1% by mass C) disc-shaped cemented carbide having a diameter of 30 mm and a thickness of 3.0 mm. Using diamond abrasive grains, etc., the cBN sintered body and the cemented carbide joint surface were mirror-polished, and then placed in acetone for 10 minutes of ultrasonic cleaning. Then, using a hot pressing device, the bonding surface of the cBN sintered body and the bonding surface of the cemented carbide overlapped, and in order not to deviate the position of the sample, a 1kgf / cm 2 While increasing the temperature from room temperature to 1250° C. in a vacuum while applying a pressure load, cooling was performed after maint...

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Abstract

Disclosed is a composite body comprising a cBN sintered body and a hard alloy that are firmly bonded. The composite body comprises a cBN sintered body, a hard alloy, and a bonding layer between the cBN sintered body and the hard alloy, wherein the bonding layer is a metal 0.1-5[mu]m thick.

Description

technical field [0001] The present invention relates to a composite body in which cBN sintered body (cubic boron nitride sintered body) and cemented carbide are firmly bonded. Background technique [0002] The cBN sintered compact is a very hard material with high thermal conductivity, and it is widely used in cutting tools and the like by taking advantage of this characteristic. In order to manufacture a cBN sintered body, a large-scale ultra-high pressure and high temperature generator must be used, and therefore, a cBN sintered body is very expensive. For this reason, in conventionally used cBN tools, a cBN sintered body is only brazed at a portion involved in cutting a cemented carbide base material. However, when joining by brazing, there is a problem in joint strength, and in particular, there is a problem that sufficient strength cannot be obtained in a cutting operation requiring strength at a high temperature. [0003] As a method of joining a cBN sintered body an...

Claims

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Application Information

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IPC IPC(8): B22F7/00B23B27/14C04B37/02C04B41/87C22C19/00C22C29/04C22C29/08C22C30/00
CPCC04B2235/3843C04B35/6303C04B2237/083C04B2235/3847C04B2235/3865C04B35/5805C04B35/58014C04B2235/3217C04B35/581C04B35/5611C04B2235/80C04B37/026C04B35/5831C04B2235/96C04B37/025C04B2237/708C04B35/5622C04B35/58071C04B2237/08C04B2237/127C04B2237/121C04B35/58064C04B2237/123C04B2235/3839C04B2237/366C04B2237/086C04B2235/3804C04B2235/386C04B2237/361C04B35/58007C22C26/00C22C29/02C04B2235/3813C04B35/5626C04B35/5607C04B2237/122C04B2235/3856C04B35/58021C04B35/645B22F7/02C04B2235/656C04B2237/401C04B2237/126C04B35/117C04B2237/36C04B2235/3886C04B35/583Y10T428/12576
Inventor 梅村崇
Owner TUNGALOY CORP
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