Method for detecting igloss amount of cast heat-preservation dead head

A heat preservation riser and detection method technology, which is applied in the direction of weighing by removing certain components, can solve the problem that the riser does not have a clear unified quality control standard in the country and industry, and cannot fully characterize the heat preservation riser compensation. There are problems such as shrinkage effect and difficulty in quality control of insulation riser purchase, so as to achieve the effect of convenient and fast detection, low cost and low cost

Inactive Publication Date: 2014-09-17
SUFA HENGDIAN MACHINERY CNNC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, there is no clear national and industry unified quality control standard for risers. Different manufacturers provide different components and quality control indicators. Some manufacturers provide quality control indicators such as SiO 2 %, Al 2 o 3 %, Fe 2 o 3 %, CaO%, MgO%, quality control indicators provided by some other manufacturers are: bulk density, modulus expansion coefficient, flexural strength, refractoriness, etc.
If the quality control index of the manufacturer is used to control the incoming quality of the thermal insulation riser, the investment in testing costs is extremely high, and the quality control index of any manufacturer cannot completely characterize the feeding effect of the thermal insulation riser in the casting process. It is difficult to control the incoming quality of thermal insulation risers suitable for casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: a kind of detection method of casting thermal insulation riser loss on ignition

[0027] Step 1: Take the test sample from the cast insulation riser and weigh it in a weighing bottle;

[0028] Step 2: Put the test sample in the first step into a drying oven at 105°C for 120 minutes;

[0029] The third step: take out the test sample after baking in the second step and put it in a desiccator to cool for 30 minutes;

[0030] Step 4: Take out the test sample cooled in the third step and put it into a crucible that is calcined at 800°C for 60 minutes and cooled in a desiccator for 30 minutes;

[0031] Step 5: Move the crucible loaded with the test sample in Step 4 into a muffle furnace that has been heated to 770°C, remove the crucible cover and burn for 60 minutes;

[0032] The sixth step: take out the test sample after burning in the fifth step and put it in a desiccator to cool for 30 minutes;

[0033] Step 7: Take out and weigh the cooled test sample in ...

Embodiment 2

[0036] Embodiment 2: a kind of detection method of casting thermal insulation riser loss on ignition

[0037] Step 1: Take the test sample from the cast insulation riser and weigh it in a weighing bottle;

[0038] Step 2: Put the test sample in the first step into a drying oven at 108°C for 150 minutes;

[0039] The third step: take out the test sample after baking in the second step and put it in a desiccator to cool for 25 minutes;

[0040] Step 4: Take out the test sample cooled in the third step and put it into a crucible that is calcined at 820°C for 70 minutes and cooled in a desiccator for 35 minutes;

[0041] Step 5: Move the crucible loaded with the test sample in Step 4 into a muffle furnace that has been heated to 780°C, remove the crucible cover and burn for 70 minutes;

[0042] The sixth step: take out the test sample after burning in the fifth step and put it into a desiccator to cool for 35 minutes;

[0043] Step 7: Take out and weigh the cooled test sample i...

Embodiment 3

[0046] Embodiment 3: a kind of detection method of casting thermal insulation riser loss on ignition

[0047] Step 1: Take the test sample from the cast insulation riser and weigh it in a weighing bottle;

[0048] The second step: put the test sample in the first step into a drying oven at 102°C for 90 minutes;

[0049] The third step: take out the test sample after baking in the second step and put it in a desiccator to cool for 15 minutes;

[0050] The fourth step: take out the test sample cooled in the third step and put it into a crucible that is calcined at 780°C for 50 minutes and cooled in a desiccator for 25 minutes;

[0051] Step 5: Move the crucible loaded with the test sample in Step 4 into a muffle furnace that has been heated to 750°C, remove the crucible cover and burn for 50 minutes;

[0052] The sixth step: take out the test sample after burning in the fifth step and put it into a desiccator to cool for 25 minutes;

[0053] Step 7: Take out and weigh the coole...

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Abstract

The invention discloses a method for detecting the igloss amount of a cast heat-preservation dead head. The igloss amount percentage of the cast heat-preservation dead head is calculated for judging whether a feeding effect of the heat preservation dead head in a simulated real casting environment meets a casting use requirement according to an obvious relation between the igloss amount of the heat preservation dead head and the feeding effect of the heat preservation dead head in a casting process. The invention mainly aims to provide a detection method which is simple, convenient and low in cost and can effectively reflect the feeding effect of the heat preservation dead head in the casting process.

Description

technical field [0001] The invention relates to a method for detecting the loss on ignition, in particular to a method for detecting the loss on ignition of a casting heat preservation riser. Background technique [0002] In the casting process, after the molten metal is injected into the mold, due to cooling and solidification, it turns from liquid to solid, resulting in volume shrinkage. When the volume shrinkage cannot be replenished by the molten metal, after solidification, pore shrinkage and shrinkage porosity occur in the parts with larger modulus in the casting. For those casting alloys with larger volume shrinkage, this defect often occurs. Shrinkage cavities and shrinkage porosity will reduce the compactness of the casting, reduce the effective section of the casting, and greatly reduce the mechanical properties. Therefore, it is necessary to control the solidification to prevent defects. The use of risers is currently the most effective and popular technological ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
Inventor 叶永姣
Owner SUFA HENGDIAN MACHINERY CNNC
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