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Method and device for testing laser absorptivity of powdery material

A technology of powder materials and testing methods, which is used in the testing of the laser absorption rate of micron or nano-scale powder materials, and the detection of laser absorption characteristics of powder materials, which can solve the problems that restrict the wide application of powder laser cladding technology and are difficult to effectively characterize powder materials. Absorption rate and other issues, to avoid poor contact, the method is simple and easy, and the versatility is good.

Inactive Publication Date: 2013-04-24
JIANGSU UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that it is difficult to effectively characterize the laser absorption of powder materials in the theoretical research and engineering practice of powder laser cladding technology because there is no test method and device for the laser absorption rate of powder materials. rate, which restricts the wider application of powder laser cladding technology in the field of net near forming of parts, etc., and invented a method and device for testing the laser absorption rate of powder materials that can directly detect the absorption rate of powder

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  • Method and device for testing laser absorptivity of powdery material

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Embodiment 1

[0035] Such as figure 1 shown.

[0036] A kind of concrete steps of the testing method of powder material laser absorptivity are as follows:

[0037] First, dry the powder to be tested in a drying oven at a temperature of 110-130°C and a drying time of not less than 6 hours; then, place the heat transfer body 5 on the surface of the powder and wash it with acetone to remove dust and other adherents on it , evenly coat a layer of heat-conducting silicone grease 4 on the powder surface of the heat transfer body 5 after cleaning, and the thickness of the heat-conducting silicone grease 4 is not more than 0.5 mm; The powder surface of the heat transfer body 5 covered with thermal grease is uniformly covered with a layer of dried powder to be tested until the thermal grease on the powder surface of the heat transfer body 5 is completely covered by the powder to be tested to form a uniform and dense test powder. Powder layer 3; if the effect of one-time powder feeding or powder s...

Embodiment 2

[0047] Such as figure 1 shown.

[0048] A test device for the laser absorption rate of powder materials, which mainly consists of a laser 1, a beam splitter 2, a heat transfer body 5, an adiabatic box 6, a water storage box 8, a laser power meter 9, a heat transfer body temperature sensor 10, a water body Temperature sensor 11, heat transfer body A / D converter 12, water body A / D converter 13, single-chip microcomputer 14 and computer 15 form; figure 1 As shown, the heat transfer body 5 is in the shape of a pedestal, and the upper end is used for applying heat-conducting silicone grease 4 and bonding the powder layer 3 to be tested. The diameter of one end of the hole, such as figure 1 As shown on the left side of the middle, the diameter of the upper end of the heat transfer body 5 matches the diameter of the countersunk through hole 7 opened at the center of the heat insulating box 6, and the diameter of the lower end matches the diameter of the countersunk through hole ...

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Abstract

The invention discloses a method and a device for testing the laser absorptivity of a powdery material, wherein the testing method mainly comprises the steps of drying powder, cleaning a heat transfer body (a sample table surface), coating a heat conduction silicone grease, laying the to-be-tested powder and testing the laser absorptivity, and the device mainly comprises a laser (1), a spectroscope (2), the heat transfer body (5), an insulating box body (6), a water containing box body (8), a laser power meter (9), temperature sensors (10 and 11), A / D converters (12 and 13), a singlechip (14) and a computer (15). The invention provides the method and the device for testing the laser absorptivity of the powdery material, so that the limitation that the present laser absorptivity is only applicable to a block material or a thin film on the block material is broken through and a foundation for pushing the theoretical research development and engineering practical application of the powder laser cladding technology is laid, and meanwhile, the method and the device have the characteristics of high testing precision, simplicity, feasibility, good generality and the like.

Description

technical field [0001] The present invention relates to a material property detection method and device, in particular to a powder material laser absorption characteristic detection method and device, in particular to a measurement of the laser absorption rate of micron or nanometer powder materials commonly used in laser cladding technology. Test method and its device. Background technique [0002] The essence of laser processing is to use the laser energy absorbed by the material to change the physical and chemical structure of the material so as to achieve a certain processing purpose. Laser cladding technology is one of the most widely used laser processing technologies in engineering practice. The cladding materials used can be divided into powder, paste, filament, rod and thin plate according to the initial supply state. Among them, the most widely used It is powder material. Therefore, it is of great significance to characterize or measure the laser absorption abili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
Inventor 王宏宇程满周建忠孙桂芳袁晓明赵玉凤黎向锋胥保文庞婧
Owner JIANGSU UNIV
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