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Extrusion and heat treatment method for high speed railway locator aluminum material

A heat treatment method and positioner technology, which is applied in the extrusion and heat treatment of aluminum materials for high-speed rail positioners, and in the field of aluminum extrusion and heat treatment, can solve the problems of high aluminum alloy, dragging, intergranular cracks, etc., and achieve high mechanical properties Effect

Inactive Publication Date: 2013-02-13
FOSHAN GOLDEN SOURCE ALUMINUM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If this process is applied to 6082 aluminum alloy, it cannot meet the requirements of high-speed rail positioner
Moreover, the process does not limit the speed of the three stages of extrusion. The aluminum alloy of the 6082 brand has relatively high Si, Mn, and Mg contents. If the end section is not slowed down, burrs, pits, dimensional deviations, and poor welding are likely to appear on the surface , dragging and other phenomena
The process described in the above patent is directly cut and packaged after extrusion, without aging treatment, only natural aging or artificial aging is used, which is easy to cause cracks, wrinkles and intergranular cracks in the product. These defects destroy the continuity of the metal matrix. Make the product lose its use value

Method used

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  • Extrusion and heat treatment method for high speed railway locator aluminum material
  • Extrusion and heat treatment method for high speed railway locator aluminum material
  • Extrusion and heat treatment method for high speed railway locator aluminum material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Aluminum rod preheating: Preheat the aluminum rod with the grade 6082 (Foshan Hongjinyuan Aluminum Products Co., Ltd., the average diameter of the aluminum rod is 150mm, and its component percentage is shown in Table 1) to 450°C, The temperature difference between the two ends of the aluminum rod is controlled within 3°C;

[0030] (2) Mold preheating: Preheat the square tube mold at 460°C for 6 hours;

[0031] (3) Preheating of the ingot barrel: Preheat the ingot barrel of the extruder to 400°C;

[0032] (4) Extrusion: the mold after step (2) preheating is packed into extruder, and mold uses the special die cushion that adapts to mold shape, then puts the aluminum bar after step (1) preheating into step ( 3) In the preheated ingot cylinder, the aluminum rod is extruded from the die through the ingot cylinder, and the aluminum rod undergoes the filling stage, advection stage and turbulent flow stage in the extruder, and finally the profile is obtained at the outlet ...

Embodiment 2

[0037] (1) Aluminum rod preheating: Preheat the aluminum rod with the grade of 6082 (Foshan Hongjinyuan Aluminum Products Co., Ltd., the average diameter of the aluminum rod is 150mm, and the percentage content of its components is shown in Table 1) to 540 ° C, The temperature difference between the two ends of the aluminum rod is controlled within 3°C;

[0038] (2) Mold preheating: Preheat the square tube mold at 510°C for 2 hours;

[0039] (3) Preheating of the ingot barrel: Preheat the ingot barrel of the extruder to 450°C;

[0040] (4) Extrusion: the mold after step (2) preheating is packed into extruder, and mold uses the special die cushion that adapts to mold shape, then puts the aluminum bar after step (1) preheating into step ( 3) In the preheated ingot cylinder, the aluminum rod is extruded from the die through the ingot cylinder, and the aluminum rod undergoes the filling stage, advection stage and turbulent flow stage in the extruder, and finally the profile is obta...

Embodiment 3

[0045] (1) Aluminum rod preheating: Preheat the aluminum rod with the grade 6082 (Foshan Hongjinyuan Aluminum Products Co., Ltd., the average diameter of the aluminum rod is 150mm, and its component percentage is shown in Table 1) to 510°C, The temperature difference between the two ends of the aluminum rod is controlled within 3°C;

[0046] (2) Mold preheating: Preheat the square tube mold at 490°C for 4 hours;

[0047] (3) Preheating of the ingot barrel: Preheat the ingot barrel of the extruder to 440°C;

[0048] (4) Extrusion: the mold after step (2) preheating is packed into extruder, and mold uses the special die cushion that adapts to mold shape, then puts the aluminum bar after step (1) preheating into step ( 3) In the preheated ingot cylinder, the aluminum rod is extruded from the die through the ingot cylinder, and the aluminum rod undergoes the filling stage, advection stage and turbulent flow stage in the extruder, and finally the profile is obtained at the outlet ...

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Abstract

The present invention discloses an extrusion and heat treatment method for a high speed railway locator aluminum material. The method comprises the following steps: preheating an aluminum rod to a temperature of 450-540 DEG C, preheating a mold to a temperature of 460-510 DEG C, preheating an ingot holding cylinder to a temperature of 400-450 DEG C, and then carrying out extrusion; carrying out online quenching on the profile after extrusion material discharging, wherein a temperature of the aluminum material after online quenching is 25-70 DEG C; naturally cooling to a temperature of 10-40 DEG C; standing for 100-160 h at a temperature of 10-40 DEG C; placing the obtained material into an aging furnace to carrying out artificial aging, wherein an aging temperature is 175-185 DEG C, and a thermal insulation time is 4-5 h; and cooling to a temperature of 10-40 DEG C after discharging out of the furnace. The high speed railway locator aluminum material produced according to the extrusion and heat treatment method has high mechanical properties, wherein tensile strength of the product is 3-31% higher than the European standard, yield strength of the product is 8-36% higher than the national standard, and elongation of the product is 28-100% higher than the national standard.

Description

technical field [0001] The invention belongs to the field of aluminum material production technology, in particular to an aluminum material extrusion and heat treatment method, in particular to an aluminum material extrusion and heat treatment method for a high-speed rail positioner. Background technique [0002] In the high-speed rail electrified railway catenary, a structural part with high strength, high toughness, low density, and low resistivity is required to dynamically provide power for the EMU. High safety factor, changes in harsh natural conditions require that the organizational structure and mechanical properties of structural parts meet product requirements, and there must be no internal tissue damage. The tensile strength of the processed part is required to be above 320Mpa, and the non-proportional elongation strength is specified to be above 310Mpa. The elongation after breaking is more than 13%. Compared with the standard Physical Date per National Standard...

Claims

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Application Information

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IPC IPC(8): C22F1/05C22F1/04C22C21/02C22C21/00C22C21/08
Inventor 杨双强匡伟龙邓海林谢建波谭柳玉谭法明王顺利
Owner FOSHAN GOLDEN SOURCE ALUMINUM PROD
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