Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A polycrystalline diamond composite sheet and its composite block

A technology of polycrystalline diamond and composite sheet, which is applied in the application of ultra-high pressure process and other directions, can solve the problems of weakening, large pressure loss, and inability to realize rigid pressure transmission, so as to reduce temperature difference, uniform composite interface, and avoid defects point effect

Active Publication Date: 2020-01-07
ZHONGNAN DIAMOND CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of its material itself, pyrophyllite cannot achieve rigid pressure transmission, and the pressure loss during the pressure transmission process is large, resulting in the pressure applied to the central area of ​​the synthetic block being greatly weakened compared with the external pressure.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A polycrystalline diamond composite sheet and its composite block
  • A polycrystalline diamond composite sheet and its composite block
  • A polycrystalline diamond composite sheet and its composite block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like Figures 1 to 3 As shown, a synthetic block for polycrystalline diamond compacts includes a synthetic cavity 9 for extruding and sintering polycrystalline diamond blanks, the synthetic cavity 9 is used to place polycrystalline diamond blanks, and the synthetic cavity 9 is sequentially Encapsulation with isolation, heat generation, insulation, and extruded shells:

[0035] The isolation layer includes a cylindrical salt tube 8 that is axially sleeved outside the synthesis chamber 9. The two ports of the salt tube 8 are encapsulated by salt sheets 10, and the outer dimensions of the salt sheet 10 are the same as those of the salt tube 8. The outer dimension of the salt tube 8 and the salt sheet 10 together constitute the isolation layer, and the space in the isolation layer is the synthesis chamber 9. In the present invention, the salt tube 8 and the salt sheet 10 are both made of NaCl. The reason for choosing NaCl The reason is: during the high temperature and high...

Embodiment 2

[0042] A kind of polycrystalline diamond composite sheet that utilizes the synthetic block described in embodiment 1 to prepare, the concrete preparation process of polycrystalline diamond composite sheet comprises the following steps:

[0043] 1) The pyrophyllite block 13 is sintered, the specific process is as follows: firstly, the temperature is raised to 180-230°C and kept for 1-2 hours, then the temperature is raised to 250-270°C and kept for 4-6 hours, and then the temperature is raised to 280-280°C 300 ℃ and keep warm for 2 ~ 3h, finally down to room temperature, that is completed.

[0044] 2) Purify the polycrystalline diamond composite sheet blank, the specific process is: put the polycrystalline diamond composite sheet blank in a vacuum sintering furnace, and evacuate until the pressure in the furnace is 3×10 -3 Pa, at 3×10 -3 Under the condition of Pa, raise the temperature to 450-500°C and keep it warm for 0.5-1h, then fill the furnace with hydrogen until the pres...

Embodiment 3

[0051] A kind of preparation method of polycrystalline diamond composite sheet, it utilizes the synthetic block described in embodiment 1 to finish, and concrete preparation process comprises the following steps:

[0052] 1) The pyrophyllite block 13 is sintered, the specific process is as follows: firstly, the temperature is raised to 180-230°C and kept for 1-2 hours, then the temperature is raised to 250-270°C and kept for 4-6 hours, and then the temperature is raised to 280-280°C 300 ℃ and keep warm for 2 ~ 3h, finally down to room temperature, that is completed.

[0053] 2) Purify the polycrystalline diamond composite sheet blank, the specific process is: put the polycrystalline diamond composite sheet blank in a vacuum sintering furnace, and evacuate until the pressure in the furnace is 3×10 -3 Pa, at 3×10 -3 Under the condition of Pa, raise the temperature to 450-500°C and keep it warm for 0.5-1h, then fill the furnace with hydrogen until the pressure in the furnace is ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
Login to View More

Abstract

The invention provides a polycrystalline diamond compact and a synthetic block thereof. The synthetic block comprises a synthetic cavity for extruding and sintering a polycrystalline diamond blank and is characterized in that an isolation layer, a heating layer, a thermal-insulation layer and an extrusion shell are sequentially arranged outside the synthetic cavity in an encapsulated manner, the heating layer comprises a cylindrical heating element sleeving the isolation layer along an axial direction, the middle portion of the heating element corresponds to the middle portion of the synthetic cavity, and the heating quantity of the middle portion of heating element is lower than that of the two ends of the heating element; the middle portion of the heating element is preferably made of molybdenum, niobium, zirconium, titanium or tantalum, and the two ends of the heating element are preferably made of graphite. The synthetic block has the advantages that axial rigid pressure transfer is achieved, pressure loss is lowered evidently, the heating element is structurally improved, temperature gradient is avoided, the temperature in the synthetic block is even, the pressure in the synthetic block is stable and consistent, and the prepared compact is excellent in performance.

Description

technical field [0001] The invention belongs to the technical field of PDC blade preparation, and in particular relates to a polycrystalline diamond composite sheet and a composite block thereof. Background technique [0002] Polycrystalline diamond compact (PDC) is a superhard composite material made of diamond micropowder as raw material, cemented carbide as matrix, and sintered under high temperature and high pressure conditions through a specific assembly method. Due to its high wear resistance and high impact toughness, PDC is widely used as a cutting element for drill bits in fields such as oil and gas exploration and mineral deposit exploration. [0003] At present, when the traditional synthesis block synthesizes polycrystalline diamond compacts, the cavity inside the synthesis block should be in a stable environment of high temperature and high pressure, but due to the pressure loss caused by the pressure transmission element and the existence of temperature gradien...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J3/06
CPCB01J3/06B01J2203/0655
Inventor 张涛卢灿华刘俊涛窦明朱培
Owner ZHONGNAN DIAMOND CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com