Preparation method of 6111 aluminum alloy plate for automobile body

A technology for aluminum alloy sheets and automobile bodies, which is applied in the field of preparation of 6111 aluminum alloy sheets for automobile bodies, can solve the problems of hindering the large-scale replacement of steel sheets by 6111 aluminum sheets, high production costs, etc., improve deep drawing performance and paint hardening performance, and improve The effect of improving efficiency and press formability

Pending Publication Date: 2018-07-06
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The 6xxx series currently being used and developed mainly include several aluminum alloys such as 6016, 6022 and 6111. In North America, the thickness of the outer body of the car is very thin or even less than 1mm, so it pays great attention to strength, so the outer body is mainly made of better strength. 6111 aluminum alloy; this alloy has excellent yield performance after T4P treatment and baking, which greatly improves the anti-sag performance of the outer body of the car. At present, the 6111 aluminum alloy sheet has been applied to the outer body of th

Method used

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  • Preparation method of 6111 aluminum alloy plate for automobile body
  • Preparation method of 6111 aluminum alloy plate for automobile body
  • Preparation method of 6111 aluminum alloy plate for automobile body

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A preparation method of 6111 aluminum alloy plate, comprising the following steps:

[0041] (1) Ingot preparation: 6111 aluminum alloy ingots were prepared by semi-continuous casting;

[0042] (2) Pretreatment and hot rolling: heat the 6111 aluminum alloy ingot to 200°C and keep it warm for 4 hours; then raise the temperature to 460°C, keep it warm for 3 hours, and then hot-roll it out of the furnace to obtain a hot-rolled sheet with a thickness of 4mm;

[0043] (3) Intermediate annealing: After heating the hot-rolled sheet to 480°C in a circulating cyclone furnace and keeping it warm for 6 hours, the cooling method is air cooling to room temperature to obtain an annealed rolled sheet;

[0044] (4) Cold rolling: the annealed plate is cold-rolled to obtain a cold-rolled plate; the final rolling thickness of the cold-rolled plate is 0.9mm;

[0045] (5) Solution treatment: solution treatment is performed on the cold-rolled sheet to obtain a solution-treated plate; wherein...

Embodiment 2

[0064] A preparation method of 6111 aluminum alloy plate, comprising the following steps:

[0065] (1) Ingot preparation: 6111 aluminum alloy ingots were prepared by semi-continuous casting;

[0066] (2) Pretreatment and hot rolling: heat the ingot of 6111 aluminum alloy to 260°C and keep it warm for 5 hours; then raise the temperature to 470°C, hold it for 3 hours and then hot-roll it out of the furnace to obtain a hot-rolled sheet with a thickness of 5mm;

[0067] (3) Intermediate annealing: heat the hot-rolled sheet at 495°C for 5 hours, then cool it in air to room temperature to obtain an annealed rolled sheet;

[0068] (4) Cold rolling: the annealed plate is cold-rolled to obtain a cold-rolled plate; the final rolling thickness of the cold-rolled plate is 0.9mm;

[0069] (5) Solution treatment: solution treatment is performed on the cold-rolled sheet to obtain a solution-treated plate; wherein, the heating temperature for solution is 540° C., the holding time is 14 minut...

Embodiment 3

[0075] A preparation method of 6111 aluminum alloy plate, comprising the following steps:

[0076] (1) Ingot preparation: 6111 aluminum alloy ingots were prepared by semi-continuous casting;

[0077] (2) Pretreatment and hot rolling: heat the ingot of 6111 aluminum alloy to 390°C and keep it warm for 6h; then raise the temperature to 475°C, hold it for 3h and then hot-roll it out of the oven to obtain a hot-rolled sheet with a thickness of 4mm;

[0078] (3) Intermediate annealing: heat the hot-rolled sheet at 495°C for 5 hours, then cool it in air to room temperature to obtain an annealed rolled sheet;

[0079] (4) Cold rolling: the annealed plate is cold-rolled to obtain a cold-rolled plate; the final rolling thickness of the cold-rolled plate is 0.9mm;

[0080] (5) Solution treatment: solution treatment is performed on the cold-rolled sheet to obtain a solution-treated plate; wherein, the heating temperature for solution is 540° C., the holding time is 14 minutes, and the c...

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Abstract

The invention provides a preparation method of a 6111 aluminum alloy plate for an automobile body. The preparation method comprises the following steps that (1) a 6111 aluminum alloy ingot is preparedby a DC casting method; (2) the ingot is heated to 200-400 DEG C, and heat is preserved for 2-6 hours, the ingot is heated to 460-500 DEG C, heat preservation is carried out for 2-4 hours, and discharging and hot rolling are carried out; (3) a hot rolled plate is heated to 480-550 DEG C, the temperature is kept for 2-6 hours, and the hot rolled plate is cooled along with a furnace; (4) cold rolling is carried out; (5) solid solution treatment on the cold-rolled plate is carried out; (6) the cold-rolled plate is placed for 5-15 minutes at the room temperature; (7) pre-aging treatment is carried out; and (8) the cold-rolled plate is placed at room temperature, namely the plate subjected to pre-aging treatment is placed at room temperature for more than 4 weeks. The method not only can shorten the production process of a 6111 aluminum alloy body plate, saves the energy, greatly reduces the production cost of the 6111 aluminum alloy body plate, and can remarkably improve and the stampingforming property and the baking varnish hardening property of the 6111 aluminum alloy body plate.

Description

Technical field: [0001] The invention belongs to the technical field of aluminum alloy plates for automobile bodies, and in particular relates to a preparation method of 6111 aluminum alloy plates for automobile bodies. Background technique: [0002] As the main means of transportation, automobiles have brought convenience to human life, but with the sharp increase in the production and ownership of automobiles, the problems of excessive energy consumption and pollution emissions have become more and more serious. In response to this problem, the best solution is to reduce the weight of the car. There are two main directions for the development of automobile lightweight: one is to use lightweight materials; the other is to optimize the structure. The use of lightweight materials is currently the most feasible way. Among them, the automobile sheet contributes the most to the lightweight of the vehicle and is the key to the lightweight design. The first choice for lightweig...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22F1/05B21C37/02
CPCC22C21/02C22F1/05B21C37/02
Inventor 田妮赵紫研王光东王河刘启隆赵刚左良
Owner NORTHEASTERN UNIV
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