Chlorine oxygen magnesium silicon clay material for inner layers of molds, preparation technology and evaluation method thereof

A magnesium oxychloride silicon pottery and soil material technology, which is applied to the inner layer material of the sintered cermet product forming mold and the field of powder metallurgy, can solve the problems of drill bit damage, difficulty in demoulding, cracking of the inner layer of clay, etc., and achieves fast molding speed, Good high temperature strength and rapid cooling collapse, easy to operate

Inactive Publication Date: 2014-06-25
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In actual production, whether domestic or foreign clay powder is used as the inner material of the mold, the inner layer of the clay often cracks when the rubber mold is removed. The phenomenon of drill bit damage

Method used

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  • Chlorine oxygen magnesium silicon clay material for inner layers of molds, preparation technology and evaluation method thereof
  • Chlorine oxygen magnesium silicon clay material for inner layers of molds, preparation technology and evaluation method thereof
  • Chlorine oxygen magnesium silicon clay material for inner layers of molds, preparation technology and evaluation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]A magnesium oxychloride silica clay material for the inner layer of a mold, which is composed of the following components according to their weight percentages: magnesia 23%, silicon dioxide 45%, ammonium dihydrogen phosphate 20%, ammonium chloride 10%, silane coupling Agent 2%. That

[0047] Prepare as follows:

[0048] (1) Weigh each constituent material with an electronic balance, and carry out crushing, grinding, and screening;

[0049] (2) Calcination treatment: place magnesium oxide in a muffle furnace and calcinate at 1200°C for 2 hours;

[0050] (3) Ball mill the calcined magnesium oxide, silicon dioxide, ammonium dihydrogen phosphate, ammonium chloride and silane coupling agent for 20 hours;

[0051] (4) After mixing evenly, sieve, the particle size (μm) of the sieved powder is distributed according to volume percentage as follows:

[0052]

[0053] (5) Encapsulate and pack for use.

Embodiment 2

[0055] A magnesium oxychloride silica clay material for the inner layer of a mold, which is composed of the following components according to their weight percentages: magnesia 20%, silicon dioxide 40%, ammonium dihydrogen phosphate 25%, ammonium chloride 12%, silane Joint agent 3%.

[0056] It is prepared as follows:

[0057] (1) Weigh each constituent material with an electronic balance, and carry out crushing, grinding, and screening;

[0058] (2) Calcination treatment: place magnesium oxide in a muffle furnace and calcinate at 1200°C for 2 hours;

[0059] (3) Ball mill the calcined magnesium oxide, silicon dioxide, ammonium dihydrogen phosphate, ammonium chloride and silane coupling agent for 18 hours;

[0060] (4) After mixing evenly, sieve, the particle size (μm) of the sieved powder is distributed according to volume percentage as follows:

[0061]

[0062] (5) Encapsulate and pack for use.

Embodiment 3

[0064] A magnesium oxychloride silica clay material for the inner layer of a mold, which is composed of the following components according to their weight percentages: magnesia 18%, silicon dioxide 38%, ammonium dihydrogen phosphate 25%, ammonium chloride 14%, silane Joint agent 5%. It is prepared as follows:

[0065] (1) Weigh each constituent material with an electronic balance, and carry out crushing, grinding, and screening;

[0066] (2) Calcination treatment: place magnesium oxide in a muffle furnace and calcinate at 1200°C for 2 hours;

[0067] (3) Ball mill the calcined magnesium oxide, silicon dioxide, ammonium dihydrogen phosphate, ammonium chloride and silane coupling agent for 12 hours;

[0068] (4) After mixing evenly, sieve, the particle size (μm) of the sieved powder is distributed according to volume percentage as follows:

[0069]

[0070]

[0071] (5) Encapsulate and pack for use.

[0072] 2. The evaluation method of magnesium oxychloride silica clay...

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Abstract

The invention discloses a chlorine oxygen magnesium silicon clay material for inner layers of molds, a preparation technology and an evaluation method thereof. The clay material is composed of following components in weight percentage: 15 to 25% of magnesium oxide, 35 to 45% of silica, 20 to 30% of ammonium biphosphate, 10 to 15% of ammonium chloride, and 2 to 5% of silane coupling agent. The preparation technology comprises following steps: weighing the materials mentioned above, grinding into powder, sieving, calcinating magnesium oxide at the temperature of 1000 to 1400 DEG C for 1 to 3 hours, performing material mixture and ball grinding for 12 to 24 hours, screening, packaging, and packing. The evaluation method comprises: analyzing the effects of water-solid ratio and temperature on the clay slurry clotting time, measuring the volume shrinkage and rate of weight loss of the clay block, evaluating high temperature strength of the clay block, and evaluating the quench collapsibility of the clay powder body. The invention has significant meaning on guiding preparation of excellent performance clay inner material, and realizing high-quality high-efficient and low-cost PDC drill sintering and mental ceramic abrasion resistance part preparation.

Description

technical field [0001] The invention relates to a powder metallurgy, cermet sintered product forming mold inner layer material, its preparation process and evaluation method, and is especially suitable for polycrystalline diamond composite chip bit forming mold and sintered cermet wear-resistant in petroleum, prospecting and machinery manufacturing industries. Manufacturing of parts. Background technique [0002] The polycrystalline diamond compact (PDC) drill bit is a one-piece drill bit. The whole drill bit has no moving parts and has high strength, high wear resistance and impact resistance. It is more and more widely used in oil drilling, coal field geological drilling and other fields due to its advantages of long life, high efficiency and stable drilling. High difficulty. [0003] At present, powder metallurgy is generally used in the production of PDC drill bits to make the drill bit body, and then the PDC cutting teeth are welded on the drill bit body. With the bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/14C04B35/626G01N5/04G01N25/00
Inventor 张进薛屺李松霞李利会
Owner SOUTHWEST PETROLEUM UNIV
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