Method for manufacturing steel inlaid guide rail sheet of large tonnage tester for metal tension test

Abstract

The invention discloses a method for making large tonnage testing machine mental extending rail plate, which comprises: choosing materials, member forging, annealing, first cutting process, normalizing process, fine cutting process, heat treatment quenching, low temperature tempering, abrading, desert spraying, phosphate processing; heat treatment quenching, adding chemical process after low temperature tempering, wherein the chemical process comprises: cleaning the mental extending rail plate at least two times, drying at low temperature 150 DEG C, taking the work piece into the oven, adding catalyst into the oven, lifting the temperature from 60 DEG C to 550 DEG C, heat preserving 14-16 hours; Making the catalyst into gas type decomposition, taking out the work piece self-cooled.

Description

technical field [0001] The invention relates to a manufacturing method of a metal stretching steel-inlaid guide rail plate of a large-tonnage testing machine, and in particular discloses a manufacturing method of a metal stretching steel-inlaid guide rail plate of a 200-ton testing machine. Background technique [0002] The national standard GB / T228-2002 stipulates the room temperature tensile test method for metal materials. The tensile test method must comply with the provisions of the GB / T228-2002 standard. The displacement, total elongation at break and maximum load of the tensile sample of metal materials And other parameters, must reach the specified value, the tensile quality of the metal material can meet the standard requirements, otherwise the test is invalid. [0003] At present, a special tensile testing machine is used for the tensile testing method of metal materials, and a special chuck is specially designed according to the char...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of this method for large tonnage (the tensile force of the testing machine is 200 tons) is: because the tensile force of the sample is relatively large, in order to ensure that the sample can be clamped, the jaw angle must be small enough, but if the α angle is too small, then The lining board will easily cause self-locking due to friction, so that the lining board cannot be returned after the test is over, and the broken sample is not easy to be taken out. The sliding between the plane kinematic pairs composed of steel guide rail plates produces strong extrusion friction, the lubricating oil film is destroyed, so it cannot lubricate, the friction coefficient increases, and the lining plate crawls. With the increase of the number of uses, the friction coefficient will become more and more If the angle becomes larger, the sample will also be displaced (that is, the so-called force drop) to a certain extent. If the α angle is increased, the clamping force will be insufficient, so that the sample will easily slip in the clamp block (that is, the force will be lost due to displacement). ) test data is inaccurate, which makes the test invalid. On the whole, it can be summarized as the following five problems:

[0008] 4. The lubricating film is easy to be damaged. After the lubricating film is destroyed, the plane sliding is prone to crawling.

[0009] 5. Sample slipping