Method and device for testing strength and plasticity of titanium alloy welding strip

Abstract

The invention provides a method and device for testing the strength and plasticity of a titanium alloy welding strip, and belongs to the technical field of welding material inspection. The problem that the strength and plasticity indexes of the titanium alloy welding strip cannot be measured in the prior art is solved. The method comprises the steps that a titanium alloy welding strip with a certain length is cut out, two notches are machined in the center of the welding strip in the length direction, the two notches are symmetrically arranged in the width direction of the welding strip, and the positions 5 mm away from the left side and the right side of the centers of the two notches are marked; the processed titanium alloy welding strip is installed in a testing device, the welding strip is stretched through the testing device until the welding strip is broken, the stretching stress and the displacement curve in the stretching process are recorded through a computer, and the maximum stretching force of the welding strip is obtained; the fractured welding strip is close to each other, and the distance between the two mark positions is measured; and calculating the plasticity and tensile strength of the titanium alloy welding strip through a formula. The device is mainly used for testing the strength and plasticity of the alloy solder strip.

Description

technical field [0001] The invention belongs to the technical field of welding material inspection, and in particular relates to a testing method and a testing device for the strength and plasticity of a titanium alloy welding strip. Background technique [0002] Titanium alloys have the characteristics of low density, high specific strength, and excellent corrosion resistance, and are widely used in aerospace, weaponry and nuclear power equipment manufacturing. Especially in the field of nuclear submarines, titanium alloys have been widely used due to the non-magnetic characteristics of titanium alloys. However, during the service and application of equipment such as nuclear submarines, due to the long-term contact with the highly corrosive medium of seawater, the surface of the titanium alloy shell will form corrosion pits and rust due to corrosion, which will cause a certain degree of safety and stable operation of the nuclear submarine. Therefore, after the nuclear subm...

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Problems solved by technology

[0004] In view of this, the present invention aims to propose a test method and testing device for the strength and plasticity of titanium alloy welding strips, so as to solve the problem that the strength and plasticity indicators of titanium alloy welding strips cannot be measured in the prior art

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