Metal hot extrusion formability judging method

A technology of extrusion forming and judging methods, which is applied in the direction of testing metals, testing the ductility of materials, and material inspection products, and can solve problems affecting the optimization and formulation of metal extrusion production processes.

Inactive Publication Date: 2008-04-30
CHONGQING UNIV
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Problems solved by technology

However, the maximum extrusion force of the positive extrusion deformation process is greatly affected by the shape of the die, which cannot fully reflect the difference in hot extrusion formability between different alloys or the same alloy undergoing different process states, and also affects the metal extrusion production process. Optimization formulation
How can we compare the differences in extrusion formability of different alloys

Method used

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  • Metal hot extrusion formability judging method
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Embodiment Construction

[0022] Referring to Fig. 1, the simulation test extrusion device used in the present invention is a reverse extrusion simulation deformation device, the extrusion cylinder 2 of the device is screwed on the right support seat 4b, and the alloy sample 3 (φ10 × 12mm round bar) is placed After entering the extrusion cylinder 2, one end of the extrusion die 1 is inserted into the extrusion cylinder 2 to form a sliding fit, and the other end is against the left support seat 4a. The center of the extrusion die 1 is provided with an axial extrusion deformation through hole. The compression deformation through hole is opposite to the channel on the left support seat 4a. A certain pressure is applied through the left and right support seats to ensure that the extrusion die 1 and the extrusion cylinder 2 are centered. Before the extrusion die 1 is put into the extrusion cylinder 2, it is necessary to apply graphite paste on both ends of the extrusion die 1 as a lubricant, and paste graph...

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Abstract

The invention discloses a method for judging the hot extrusion formability of comparative metals. It selects an alloy from the alloys participating in the comparison and extrudes it under constant temperature and constant speed conditions within a specified time to obtain the alloy to achieve continuous extrusion. The minimum extrusion force of extrusion, and with this extrusion force as a starting point, is extruded under constant temperature conditions to obtain the common minimum extrusion force of all alloys participating in the comparison to achieve continuous extrusion within a specified time, and use this as a constant Extrusion force, and then on the simulation test extrusion device, carry out constant temperature and constant force extrusion on the samples of various alloys participating in the comparison, and obtain the extrusion stroke and extrusion time of various alloys under the state of constant temperature and constant force. Relationship curve, through comparison to obtain the metal hot extrusion forming properties of various alloys.

Description

technical field [0001] The invention relates to a method for judging the extrusion formability of metals, in particular to a method for judging the hot extrusion formability of metals. Background technique [0002] In industrial production, since there are certain differences in the metal formability of alloys with different chemical compositions or alloys with the same composition but undergoing different process states, it is possible to compare the metal hot deformation formability of different alloys or the same alloy undergoing different process states. It is of great significance to provide optimization basis for alloy composition design, heat treatment process before extrusion forming and extrusion forming process formulation. [0003] When comparing the plastic deformation formability of different alloys or the same alloy undergoing different process states, the speed of plastic forming and product quality under the same conditions are usually used to compare its for...

Claims

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Application Information

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IPC IPC(8): G01N3/28G01N33/20
Inventor 潘复生彭建王敬丰李权刘虹
Owner CHONGQING UNIV
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