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Cavity assembly and assembly method for synthesizing diamond and cubic boron nitride sintered bodies

A technology of cubic boron nitride and synthetic diamond, which is applied in the fields of diamond for cutting tools, drilling, and cubic boron nitride manufacturing. The overall performance of the layer and the performance of superhard material tools are affected, and the effects of high synthesis integrity, small deformation, and low porosity are achieved.

Active Publication Date: 2016-10-26
昆山长鹰硬质材料科技股份有限公司
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Problems solved by technology

At present, the existing assembly structure does not use a suitable metal combination cup to shield pollution and remove impurities, and does not make full use of the combination of pressure transmission and heat preservation medium materials and graphite materials to support and reduce deformation, and does not fully consider the pressure field and The stability and uniformity of the temperature field does not consider the influence of impurities such as cavity gas, which will affect the overall performance of the diamond and boron nitride polycrystalline layers, which will cause uneven sintered structure, serious deformation, chipping, and stable repetition. gender issues
Seriously affect the performance of superhard material tools

Method used

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  • Cavity assembly and assembly method for synthesizing diamond and cubic boron nitride sintered bodies

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Embodiment Construction

[0015] The invention mainly relates to cavity assembly and cavity assembly method for synthesizing diamond and cubic boron nitride sintered bodies. The present invention adopts the assembly of the cavity to prepare a large-sized sintered body of superhard material (Φ 40 mm*5 mm or more), can effectively control the stability of the synthetic cavity and the uniformity of the pressure field and temperature field, and make the structure of the sintered body The structure is dense and uniform, and at the same time, it can suppress the sintering deformation of diamond and cubic boron nitride, thereby further improving the quality and integrity of the sintered body.

[0016] The cavity assembly is composed of pyrophyllite composite block 6, graphite heating tube 7, magnesium oxide cup, iron cup, graphite cup, molybdenum cup, and niobium cup. The magnesium oxide cup and iron cup assembled in the graphite heating tube in the pyrophyllite composite block , graphite cups, molybdenum cup...

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Abstract

The invention belongs to a chamber assembly for synthesizing a diamond and cubic boron nitride sintered body and an assembling method. The chamber assembly consists of a pyrophyllite composite block, a graphite heating tube, a magnesium oxide cup, an iron cup, a graphite cup, a molybdenum cup and a niobium cup, wherein the magnesium oxide cup, the iron cup, the graphite cup, the molybdenum cup and the niobium cup assembled and placed in the graphite heating tube in the pyrophyllite composite block are in close fit, sequentially the magnesium oxide cup, the iron cup, the graphite cup, the molybdenum cup and the niobium cup are arranged from outside to inside, and the molybdenum cup and the niobium cup are fastened together in opposite directions. The materials are simultaneously put in a pyrophyllite composite block sintering chamber with the graphite heating tube in a sequence from outside to inside. The deformation of the synthesized sintered body is small, the synthesis integrity rate is high, the residual stress in a super-hard material polycrystalline layer is small, the distribution is more uniform, the porosity is low and the large-sized sintered body can be prepared.

Description

technical field [0001] The invention belongs to the field of diamond and cubic boron nitride manufacturing for drilling and cutting tools, in particular to a cavity assembly and an assembly method for synthesizing diamond and cubic boron nitride sintered bodies. Background technique [0002] Superhard materials such as polycrystalline diamond and cubic boron nitride are high-performance structural materials that are formed by sintering diamond and cubic boron nitride particles under high temperature and high pressure conditions with the help of sintering aids. This material has the wear resistance and strength of superhard materials. It is an excellent cutting tool and wear-resistant material. It is widely used in machining tools, petroleum and geological drill bits, grinding wheel dressing tools, etc. [0003] Due to the different manufacturing and assembly methods of superhard materials, their product performance will also show obvious differences. From the current applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J3/06
Inventor 贾洪声李海波鄂元龙马根龙
Owner 昆山长鹰硬质材料科技股份有限公司
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