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Online detection method of grain refinement and metamorphism effect of aluminum alloy melt

A technology for aluminum alloy melt and grain refinement, which is applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as immature application, achieve low detection cost, help guide production, and reduce the cost of thermal analysis technology.

Active Publication Date: 2014-01-08
天津新立中合金集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with foreign countries, there is still a certain gap in the application of domestic thermal analysis methods, and the application is not yet mature

Method used

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  • Online detection method of grain refinement and metamorphism effect of aluminum alloy melt
  • Online detection method of grain refinement and metamorphism effect of aluminum alloy melt
  • Online detection method of grain refinement and metamorphism effect of aluminum alloy melt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The thermal analysis experiment of different heats of AS7G03 aluminum alloy was carried out by using TA110 thermal analyzer.

[0026] The A1 furnace melt was injected into the crucible, the injection temperature was 657.2°C, the crucible preheating temperature was 330°C, and the melt cooling rate was -0.6°C / S. The thermal analysis data collection, analysis and result output were realized by a thermal analyzer. Thermal analysis of the cooling curve, and then obtain the re-glow undercooling value reflecting the refinement of melt grains, marked as dTL; and the eutectic growth undercooling value reflecting the degree of deterioration, marked as dTS, the experimental data are shown in Table 3 .

[0027] dTL and dTS are thermal analysis characteristic parameters automatically read by the thermal analyzer.

[0028] At this time, the AS7G03 aluminum liquid in the A1 smelting furnace was poured into an ingot, sawed and ground into a metallographic sample, and then the microstr...

Embodiment 2

[0030] The difference from Example 1 is that: A2 furnace AS7G03 melt is injected into the crucible, the injection temperature is 646.6°C, the crucible preheating temperature is 360°C, and the melt cooling rate is -0.6°C / S.

[0031] The experimental data are shown in Table 3, and the metallographic picture of the A2 furnace ingot is shown in Figure 1(b).

Embodiment 3

[0033] The difference from Example 1 is that: A3 furnace AS7G03 melt is injected into the crucible, the injection temperature is 649.2°C, the crucible preheating temperature is 340°C, and the melt cooling rate is -0.6°C / S.

[0034] The experimental data are shown in Table 3, and the metallographic picture of the A32 furnace ingot is shown in Figure 1(c).

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Abstract

The invention provides an online detection method of the grain refinement and metamorphism effect of aluminum alloy melt. The method comprises the following steps of: injecting the melt into a crucible, and controlling the injection temperature of the melt in crucible at 640-670 DEG C, the crucible preheating temperature at 300-400 DEG C and the cooling rate of the melt at (-0.5)-(-0.6) DEG C per second; and realizing the acquisition and analysis of the thermal analysis data and result output through a thermal analyzer to obtain a thermal analysis cooling curve, thereby obtaining the recalescence supercooling degree value reflecting the melt grain refinement and marked as dTL and the eutectic growth supercooling degree value reflecting the metamorphism degree and marked as dTS, wherein the less dTL indicates smaller grain, and the greater dTS indicates better metamorphism effect. The method provided by the invention can be used as a ladle analysis means to detect the quality of the alloy melt before pouring to predict the alloy grain refinement and metamorphism effect; and the method is easy and feasible, and the detection cost is low.

Description

technical field [0001] The invention relates to an analysis method in an aluminum alloy smelting process, in particular to a method for on-line detection of grain refinement and metamorphic effects of an aluminum alloy melt. Background technique [0002] Thermal analysis is a test and analysis method to determine the change of the state of the substance by measuring the change of the physical properties caused by the change of the temperature of the substance, that is, by measuring the changes of the thermodynamic properties and physical properties that occur with the temperature change of the substance and the progress of the chemical reaction. , and then determine the thermal changes of material structure and a method of chemical reaction constants. No matter what kind of change occurs in the alloy (such as melting during heating, crystallization during cooling, allotropic transformation, melting or precipitation of excess phase in solid state, etc.), it is accompanied by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/00
Inventor 翟盼盼霍会娟于富兴庞会霞王建东
Owner 天津新立中合金集团有限公司
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