Alien three common process methods
The very common process detection methods in this special-shaped tee are as follows:
(1) Repeat the bending experiment: Clamp one end of the sample. Perform 60-degree repeated reverse bending on a cylindrical surface with a regular radius to test the repeated bending resistance of the metal and show its defects.
(2) Upsetting test: Hammer or forge samples of regular size. It is an experiment to test the ability of a special-shaped tee to withstand plastic deformation by upsetting it at room temperature or in a hot state and to show its defects. Upsetting experiments carried out at room temperature are called room temperature upsetting experiments, also known as cold upsetting experiments. The upsetting experiment carried out in the hot state is called the hot upsetting experiment;
(3) Tube crimping test: press the center of a regular shape into one end of the metal tube, so that the tube wall is evenly rolled to a regular size, and check the ability of the tube wall to withstand the plastic deformation of the outer roll and show its defects;
(4) Pipe hydraulic test: a test to fill the metal pipe with water or regular liquid, withstand the prescribed pressure within a certain period of time, check the quality and strength of the special-shaped tee and show its defects;
(5) Hardenability: refers to the ability of steel to be quenched after austenitization, or the tendency of austenite to martensite, which is often explained by the depth of the hardened layer. The depth of the hardened layer refers to the distance from the surface to the semi-martensitic layer. For alloy structural steel, the method of checking hardenability is mainly the end quenching test method of structural steel stipulated in national standards;
(6) Machinability: The performance is shown when special-shaped tee materials are processed with cutting tools. When cutting or grinding, it is easy to achieve high surface processing accuracy, and the tools are not easy to wear, the chips are easy to fall off, and the cutting force is small, etc., all of which indicate that the metal material has good machinability;
(7) Bending test: Bending the sample to a regular level with a bent center of regular size to test the ability of the metal to withstand bending plastic deformation and to show its defects. Generally, the diameter and bending angle of the bending center should be specified, as well as the requirements for the appearance of the bending place;
(8) Tube bending test: bend the sample to a regular level on the grooved center to check the ability of the special-shaped tee to withstand bending plastic deformation and show its defects;
(9) Tube flattening test: a test to flatten a metal tube to a specified size, check its plastic deformation ability, and show its defects;
(10) Tube flaring test: Press the top center of the regular taper into one end of the metal tube to expand the diameter evenly to the regular size, test the ability of special-shaped tee radial expansion plastic deformation and show its defects.