Graphite Support System for Gas Cannon/Cannon Preheated Shock Experiments

A technology for impact experiments and support systems, applied in the direction of instruments, analytical materials, measuring devices, etc., can solve the problems of reducing the available temperature range, high thermal resistance, etc., and achieve the effects of consistent quality, high volume density, and long service life at high temperatures

Active Publication Date: 2020-08-04
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high thermal resistance of the ceramic material itself, the temperature near the sample is high, and the temperature away from the sample is low; the huge temperature gradient makes the ceramic lose its excellent mechanical properties, and breaks when it is far from its melting point. , greatly reducing its usable temperature range

Method used

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  • Graphite Support System for Gas Cannon/Cannon Preheated Shock Experiments
  • Graphite Support System for Gas Cannon/Cannon Preheated Shock Experiments
  • Graphite Support System for Gas Cannon/Cannon Preheated Shock Experiments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of described graphite support body comprises the following steps:

[0043] Step 1. In parts by weight, take 80 parts of pitch coke powder, 40 parts of petroleum coke powder, 20 parts of modified graphite powder, 3 parts of boron nitride and 4 parts of attapulgite, put them in a vacuum kneader, and heat The temperature was opened and mixed for 45 minutes, then 25 parts of asphalt slurry was added, vacuumed and kneaded for 80 minutes, and then heated to 240°C for 1 hour of vacuum kneading, wherein the forward speed of the kneader was controlled at 120r / min;

[0044] Step 2. Put the material obtained in step 1 into a sheet rolling machine and roll it into flakes; then grind the flakes into powder; put the powder into a graphite support mold for compaction and vacuum treatment, and then send it to isostatic pressing Increase the pressure in the machine to 180MPa at a boost rate of 3MPa / min, stabilize the pressure for 30min, then release the pressure t...

Embodiment 2

[0051] The preparation method of described graphite support body comprises the following steps:

[0052] Step 1. In parts by weight, take 50 parts of pitch coke powder, 30 parts of petroleum coke powder, 10 parts of modified graphite powder, 1 part of boron nitride and 3 parts of attapulgite, put them in a vacuum kneader, and heat The temperature was opened and mixed for 30 minutes, then 20 parts of asphalt slurry was added, vacuumed and kneaded for 60 minutes, and then heated to 230°C for 1 hour of vacuum kneading, wherein the forward speed of the kneader was controlled at 100r / min;

[0053] Step 2. Put the material obtained in step 1 into a sheet rolling machine and roll it into flakes; then grind the flakes into powder; put the powder into a graphite support mold for compaction and vacuum treatment, and then send it to isostatic pressing Increase the pressure in the machine to 160MPa at a boost rate of 1MPa / min, stabilize the pressure for 30 minutes, then release the pressu...

Embodiment 3

[0060] The preparation method of described graphite support body comprises the following steps:

[0061] Step 1. In parts by weight, take 100 parts of pitch coke powder, 50 parts of petroleum coke powder, 30 parts of modified graphite powder, 5 parts of boron nitride and 5 parts of attapulgite, put them in a vacuum kneader, and heat The temperature was opened and mixed for 60 minutes, then 30 parts of asphalt slurry was added, vacuumed and kneaded for 90 minutes, and then heated to 250°C for 2 hours under vacuum, and the forward speed of the kneader was controlled at 150r / min;

[0062] Step 2. Put the material obtained in step 1 into a sheet rolling machine and roll it into flakes; then grind the flakes into powder; put the powder into a graphite support mold for compaction and vacuum treatment, and then send it to isostatic pressing Increase the pressure in the machine to 200MPa at a boost rate of 5MPa / min, stabilize the pressure for 30 minutes, then release the pressure to 8...

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Abstract

The invention discloses a graphite support system for a preheating impact experiment of a gas gun / a fire gun. The graphite support system comprises a water cooling disc, a metal base and a graphite support body, wherein the middle part of the water cooling disc is provided with an accommodating groove; the metal base is connected with the interior ofinto the accommodation groove of the water cooling disc; the graphite support body is connected with the interior ofinto the metal base; the graphite support body is uniformly provided with a plurality of grooves for fixing a preheating impact experiment sample; a plurality of support legs for the preheating impact experiment sample are arranged in the multiple grooves to fix the preheating impact experiment sample. The graphite support systemhas the advantages that by adopting the leg support type, the graphite support body is arranged away from an induction coil, and an electromagnetic filed field produced by the induction coil can moreeffectively act onto the sample; the graphite support body is fixedly arranged on the water cooling disc through the metal base, so that the heat transferred out by the graphite support body is carried away by cooling water, and the temperature rise of the equipment after water cooling circulation is controlled within the an acceptable range; proofed by experiment, the sample with high temperatureof 2200 DEG C can be effectively supported, and the integrity of the graphite support body is maintained.

Description

technical field [0001] The invention relates to a support system for gas cannon / cannon preheating shock experiments, in particular to a graphite support system for gas cannon / cannon preheating shock experiments. Background technique [0002] In the study of shock loading using gas cannons / cannons to generate shock waves to obtain the dynamic properties of materials, in order to obtain the dynamic response of sample materials at high temperatures, it is necessary to preheat the samples and then perform shock loading. There are two main ways to pre-heat the sample, one is resistance wire heating, which is suitable for the pre-heating impact experiment research of samples below 1000 °C; the other is electromagnetic induction heating, which introduces high-frequency heating around the metal material The changing electromagnetic field causes eddy currents to be generated inside to increase the temperature. The heated metal material and the electromagnetic coil used for heating ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/532C04B35/622G01N3/313
CPCC04B35/522C04B35/532C04B35/622C04B2235/349C04B2235/386C04B2235/422C04B2235/602C04B2235/616C04B2235/6562C04B2235/77C04B2235/96G01N3/313G01N2203/001G01N2203/0044G01N2203/0067G01N2203/0226
Inventor 张修路伍春尤晓建遆瑞娟齐少鹏张新濮卢宇赵建洲牛振威刘成安
Owner SOUTHWEAT UNIV OF SCI & TECH
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