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Method for eliminating temperature gradient in metal strip sample heat treatment test

A technology of temperature gradient and metal strip, applied in the field of metal heat treatment, can solve the problems of large temperature gradient, huge equipment, increase equipment cost, etc., and achieve the effect of increasing the length of the uniform temperature zone, reducing the production cost and reducing the temperature gradient.

Inactive Publication Date: 2008-11-26
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the test of the continuous annealing simulation test machine for cold-rolled strip steel, it is often required to carry out the stamping performance test on the plate sample after heat treatment. According to the national standard, the minimum size of the plate sample for the stamping performance test is 300×300mm, so that It is required that the uniform temperature zone length of the sample should be at least 300mm during the test of the cold-rolled strip steel continuous annealing simulation test machine. To achieve this purpose, only increase the length of the sample, such as when the allowable temperature gradient ΔT=±50℃ , the length of the sample should reach 1200mm. When the allowable temperature gradient ΔT=±20℃, the length of the sample should reach 1800mm; however, the test needs to be carried out in a vacuum or a certain protective atmosphere. After the length of the sample increases, the operation The volume of the box and the overall equipment increases, which increases the cost of the equipment and increases the cost of the test; even so, the temperature gradient in the uniform temperature zone is still relatively large, which affects the accuracy of the test
For example, the strip steel continuous annealing simulation test machine produced by voestalpine Company allows the maximum length of the sample to be 600mm, and the length of the uniform temperature zone is difficult to meet the requirements of the stamping performance test. The equipment is very large and expensive

Method used

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  • Method for eliminating temperature gradient in metal strip sample heat treatment test
  • Method for eliminating temperature gradient in metal strip sample heat treatment test
  • Method for eliminating temperature gradient in metal strip sample heat treatment test

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Embodiment Construction

[0015] The method of the present invention is adopted in the continuous annealing simulation experiment machine of cold rolled strip steel, and the details are as follows.

[0016] Such as figure 1 As shown, the sample 1, the fixture 2, the infrared heating devices 5, 6, 7, and 8 are all placed in the operation box 11, and the operation box 11 can be evacuated or filled with various protective atmospheres; the fixture 2 and the heating transformer 3 The sub-levels are connected by a 20×100mm copper bar. Sample 1 is a 1.0×300×560mm cold-rolled strip steel, with 50mm at both ends being clamped in the fixture 2, and the width of the opening of the reflector 10 is 50mm , The reflector 10 is fixed on the wall of the operation box 11, arranged vertically and symmetrically on the sample 1 up and down, the opening is 100mm away from the surface of the sample 1, and the outermost edge is 30mm away from the fixture 2. Infrared heating device The infrared light-emitting lamps 9 in 5, 6 and ...

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Abstract

The invention relates to a method for erasing temperature gradient in mental plate with sample heat treating experiment, which is characterized in that it adds infrared radiation heating means based on the mode of directly using the resistance to heat; it fixes infrared heating apparatus on the two sides of the sample near the clamp, and uses the infrared radiation energy of the infrared heating apparatus to compensate the heat leaked by heat transmitting; it separately controls the directly resistance heating and the infrared radiation heating.

Description

Technical field [0001] The invention relates to the technical field of metal heat treatment, in particular to a method for eliminating temperature gradients in heat treatment tests of metal strip samples. Background technique [0002] At present, many material physical simulation equipment such as thermal simulation experiment machine, cold-rolled strip continuous annealing simulation experiment machine, etc., in order to achieve the purpose of rapid metal heating, usually use direct resistance heating, that is, use a heating transformer to provide a certain voltage to the sample. A large current is passed through the sample, and the resistance of the sample itself is used to achieve the purpose of heating. Since the sample is clamped between two water-cooled clamps, a large temperature gradient is likely to occur due to heat conduction ΔT = ( 2 x L ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/44
Inventor 骆宗安花福安王国栋刘相华
Owner NORTHEASTERN UNIV LIAONING
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