Method for coating and processing sample by using nickel screens

Abstract

The invention provides a method for coating and processing a sample by using nickel screens. The method comprises the following steps: two nickel screens are used for symmetrically coating the sample,the coated sample is placed in a clamp having a shaped matched with the sample, the clamp with the sample is placed in a tablet press for being stamped; after stamping is completed, the sample in theclamp is taken out, the processed sample is subjected to welding of a thermocouple wire on a spot welder, and wiped joints fall down the nickel screens. The weldability of nickel and a nickel alloy is good, the nickel screens performs partial coating treatment on the sample, the nickel screens and the surface of the sample are subjected to cold pressing and tight pasting, the thermocouple wire iswelded on the nickel screens, which can substitute welding on the sample, problem of temperature measurement of a material with poor solderability can be solved, a thermal simulation test can be accurately carried out, and the test success rate is increased. The method has the advantages that an appliance is simple, test cost is reduced, and operation is easy to operate.

Description

technical field [0001] The invention relates to the technical field of thermal simulation experiments, in particular to a method for wrapping a sample with a nickel mesh. Background technique [0002] The physical simulation technology of material processing is widely used in the field of material research and development and processing because it is effective and cost-effective. Among them, the accurate measurement of the temperature of the thermal simulation sample during the test is the key to the success of the test. Usually, the thermocouple wire is welded on the steel material sample with a spot welder, and the solder joint is firm and the temperature measurement is accurate; however , when the sample of the simulation test is made of materials such as aluminum, copper, magnesium, etc., due to the low resistivity, it is difficult to firmly weld the thermocouple wire and the sample, which leads to frequent failures of the test and cannot be carried out. At the same time...

AI Technical Summary

Problems solved by technology

Among them, the accurate measurement of the temperature of the thermal simulation sample during the test is the key to the success of the test. Usually, the thermocouple wire is welded on the steel material sample with a spot welder, and the solder joint is firm and the temperature measurement is accurate; however , when the sample of the simulation test is made of materials such as aluminum, copper, magnesium, etc., due to the low resistivity, it is difficult to firmly weld the thermocouple wire and the sample, which leads to frequent failures of the test and cannot be carried out. At the same time, the application range of the thermal simulation testing machine is restricted.

[0003] The publication number is CN105651618A, and the Chinese invention patent titled "A Method for Arranging Thermocouple Wires on Samples" solves the problem of welding thermocouple wires on materials with poor weldability to a certain extent, but in this method, the sample During the deformation process, the welding point of the two thermocouple wires is easily pulled apart, so the temperature measurement fails, and the success rate of the test is not high

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