Large-strain rolling method for alloy or metal matrix composite wide thin plates

Abstract

The invention discloses a large-strain rolling method for alloy or metal matrix composite wide thin plates. The method includes the steps: firstly, preparing an alloy or metal matrix composite to an ingot blank; secondly, subjecting the ingot blank to hot extrusion to form a plate with certain thickness; and finally forming by continuous cold rolling. By the method, high-strength high-ductility alloy or metal matrix composite wide thin plates which are excellent both in tensile strength and elongation indexes can be prepared on existing equipment at one time by adjusting rolling process parameters; and the method has the advantages of simplicity in technique, convenience in operation and no increase of preparation cost, can be used for preparation of ultrahigh-strength alloy or metal matrix composite wide thin plates urgently needed by automobiles, rail transit and aerospace, and has broad application prospect.

Description

technical field

[0001] The invention relates to the field of forming and control of alloy or metal-based composite materials, in particular to a large-strain rolling method for wide-width thin plates of alloy or metal-based composite materials. Background technique

[0002] Large-size, ultra-high-strength, high-toughness alloy or metal matrix composite wide sheets have broad application prospects in automobiles, rail transit, aerospace and other fields, but their preparation has always been a difficult problem in the material industry at home and abroad. At present, in order to ensure higher tensile strength for this type of wide sheet, it is generally prepared by solution and aging heat treatment after hot rolling.

[0003] The application number is 200910071585.5, and the Chinese invention patent specification titled "Preparation method of TiAl-based composite material plate" discloses a preparation method of a TiAl-based composite material plate. The preparation method in...

Examples

Embodiment 1

[0052] The silicon carbide particle reinforced aluminum matrix composite material is used to roll a wide sheet, and the preparation process is as follows:

[0053] a. Using spray deposition rapid solidification technology to prepare silicon carbide particle-reinforced aluminum matrix composite material into an ingot;

[0054] b. Hot extruding the ingot into a plate with a thickness of 10 mm;

[0055] c. Heat the plate to 440-470°C, and roll the plate with a pass reduction of 10%;

[0056] d, repeat the heating and rolling process of step c until the plate thickness is 4mm;

[0057] e. The plate obtained in step d is continuously rolled to a thickness of 0.75mm at a pass reduction of 50%, without heat treatment between passes.

[0058] Depend on figure 1 It can be seen that the wide sheet of SiCp / 7075Al composite material prepared by the process of this embodiment is broken at 720 MPa, and the tensile strength reaches 720 MPa, which has good physical properties.

Embodiment 2

[0060] Titanium carbide particle-reinforced aluminum matrix composites are used, and the preparation process is as follows:

[0061] a. Using powder metallurgy technology to prepare titanium carbide particle-reinforced aluminum matrix composite material into an ingot;

[0062] b. Hot extruding the ingot into a plate with a thickness of 12 mm;

[0063] c. Heat the plate to 380-420°C, and roll the plate with a pass reduction of 8%;

[0064] d, repeat the heating and rolling process of step c until the plate thickness is 3mm;

[0065] e. The plate obtained in step d is continuously rolled to a thickness of 0.8mm at a pass reduction of 40%, without heat treatment between passes.

Embodiment 3

[0067] Using 5083Al aluminum alloy, the preparation process is as follows:

[0068] a. The 5083Al aluminum alloy is prepared into an ingot by casting technology;

[0069] b. Hot extruding the ingot into a plate with a thickness of 8 mm;

[0070] c. Heat the plate to 300-360°C, and roll the plate with a pass reduction of 5%;

[0071] d, repeat the heating and rolling process of step c until the plate thickness is 2mm;

[0072] e. The plate obtained in step d is continuously rolled to a thickness of 0.5 mm with a pass reduction of 30%, without heat treatment between passes.

technical field

[0001] The invention relates to the field of forming and control of alloy or metal-based composite materials, in particular to a large-strain rolling method for wide-width thin plates of alloy or metal-based composite materials. Background technique

[0002] Large-size, ultra-high-strength, high-toughness alloy or metal matrix composite wide sheets have broad application prospects in automobiles, rail transit, aerospace and other fields, but their preparation has always been a difficult problem in the material industry at home and abroad. At present, in order to ensure higher tensile strength for this type of wide sheet, it is generally prepared by solution and aging heat treatment after hot rolling.

[0003] The application number is 200910071585.5, and the Chinese invention patent specification titled "Preparation method of TiAl-based composite material plate" discloses a preparation method of a TiAl-based composite material plate. The preparation method in...

Examples

Embodiment 1

[0052] The silicon carbide particle reinforced aluminum matrix composite material is used to roll a wide sheet, and the preparation process is as follows:

[0053] a. Using spray deposition rapid solidification technology to prepare silicon carbide particle-reinforced aluminum matrix composite material into an ingot;

[0054] b. Hot extruding the ingot into a plate with a thickness of 10 mm;

[0055] c. Heat the plate to 440-470°C, and roll the plate with a pass reduction of 10%;

[0056] d, repeat the heating and rolling process of step c until the plate thickness is 4mm;

[0057] e. The plate obtained in step d is continuously rolled to a thickness of 0.75mm at a pass reduction of 50%, without heat treatment between passes.

[0058] Depend on figure 1 It can be seen that the wide sheet of SiCp / 7075Al composite material prepared by the process of this embodiment is broken at 720 MPa, and the tensile strength reaches 720 MPa, which has good physical properties.

Embodiment 2

[0060] Titanium carbide particle-reinforced aluminum matrix composites are used, and the preparation process is as follows:

[0061] a. Using powder metallurgy technology to prepare titanium carbide particle-reinforced aluminum matrix composite material into an ingot;

[0062] b. Hot extruding the ingot into a plate with a thickness of 12 mm;

[0063] c. Heat the plate to 380-420°C, and roll the plate with a pass reduction of 8%;

[0064] d, repeat the heating and rolling process of step c until the plate thickness is 3mm;

[0065] e. The plate obtained in step d is continuously rolled to a thickness of 0.8mm at a pass reduction of 40%, without heat treatment between passes.

Embodiment 3

[0067] Using 5083Al aluminum alloy, the preparation process is as follows:

[0068] a. The 5083Al aluminum alloy is prepared into an ingot by casting technology;

[0069] b. Hot extruding the ingot into a plate with a thickness of 8 mm;

[0070] c. Heat the plate to 300-360°C, and roll the plate with a pass reduction of 5%;

[0071] d, repeat the heating and rolling process of step c until the plate thickness is 2mm;

[0072] e. The plate obtained in step d is continuously rolled to a thickness of 0.5 mm with a pass reduction of 30%, without heat treatment between passes.

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