Method for measuring critical deformation condition of deformed alloy

Abstract

The invention discloses a method for measuring critical deformation conditions of deformed alloy, which comprises the following steps: a, designing a mold for measuring critical deformation, the mold comprises an upper mold and a lower mold, the lower mold is provided with a through mold cavity, and the mold cavity comprises a deformation cavity and a deep cavity; b, selecting and machining a deformed alloy grade to obtain a deformed alloy blank, wherein the deformed alloy blank comprises a deformed section and a filling section, and the filling section is matched with the deep cavity; c, forging equipment is selected, after the pressing speed and the forging temperature are fixed, a deformation test is carried out, a deformed alloy test finished product is forged and formed, and macrostructure detection is carried out on the critical deformation part of the deformed alloy test finished product; and d, performing numerical simulation on the deformation test process by using Deform software, and performing comparative analysis on a simulation result and the measured macrostructure to obtain a critical deformation condition. According to the method, the critical strain value can be accurately obtained to guide formulation of the die and the forging process, and critical deformation is avoided.

Description

technical field [0001] The invention relates to a measurement method, in particular to a method for measuring critical deformation conditions of deformed alloys. Background technique [0002] With the advancement of industrial technology and the popularization of the concept of cost reduction, more and more industrial products are also beginning to pursue a higher service life, which puts forward higher quality requirements for industrial products. For products, a uniform structure between batches can significantly improve its fatigue life, thereby reducing workpiece costs. [0003] Coarse grains are very unfavorable to the mechanical properties of metals. For deformed alloys, there is a critical degree of deformation at a certain deformation temperature. Under the condition of critical deformation, the metal deformed will have abnormal grain growth, which can be seen from the classical critical deformation theory , when the degree of deformation is small, the grains of the...

AI Technical Summary

Problems solved by technology

[0006](1) Both the model and the actual verification of the cone test method have a large free end, and there are deviations from the actual results in the actual quantification results. The results are difficult to quantify;

[0007](2) The cone test method has more free end areas, and the heat exchange and strain rate in the test process are quite different from the actual forming process of die forgings. The test results It has little guiding significance for the production of die forging products

Images