CN111001993A - Multi-sheet aluminum alloy hub forging process - Google Patents

Multi-sheet aluminum alloy hub forging process Download PDF

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Publication number
CN111001993A
CN111001993A CN201911375888.6A CN201911375888A CN111001993A CN 111001993 A CN111001993 A CN 111001993A CN 201911375888 A CN201911375888 A CN 201911375888A CN 111001993 A CN111001993 A CN 111001993A
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CN
China
Prior art keywords
wheel
aluminum
forging
molten aluminum
piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911375888.6A
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Chinese (zh)
Inventor
何芳
何国元
张伟斌
裔国宇
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Dare Wheel Manufacture Co ltd
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Dare Wheel Manufacture Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dare Wheel Manufacture Co ltd filed Critical Dare Wheel Manufacture Co ltd
Priority to CN201911375888.6A priority Critical patent/CN111001993A/en
Publication of CN111001993A publication Critical patent/CN111001993A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06Work-clamping means
    • B23Q3/061Work-clamping means adapted for holding a plurality of workpieces

Abstract

The invention belongs to the technical field of metal forging, relates to a forging process, and particularly relates to a multi-sheet aluminum alloy hub forging process, which comprises the following steps: melting an A356.2 aluminum ingot and a waste wheel into molten aluminum in proportion, blending the molten aluminum, degassing and refining the molten aluminum, and forging the molten aluminum, wherein the mass ratio of the molten aluminum to the waste wheel is 60-70% and the mass ratio of the molten aluminum to the waste wheel is 30-40%; respectively forging blanks of the front and rear piece of wheel rims and the middle piece of wheel spokes; carrying out heat treatment on the forged blank to ensure various properties of the product; machining the blank to meet the size requirement; coating or electroplating the surface; and assembling and fastening the front and rear wheel rims and the middle wheel spoke. In the smelting process, the aluminum ingot, the waste wheel and the aluminum scraps in the raw materials are melted in proportion, and the intermediate alloy is added for blending, so that the contents of Mn and Cu in the aluminum water are improved, the internal structure performance is optimized, and the strength of the finished product is improved. The product is subjected to heat treatment by using the homogenization and overaging heat treatment process, so that the mechanical property of the product is greatly improved.

Description

Multi-sheet aluminum alloy hub forging process
Technical Field
The invention belongs to the technical field of metal forging, relates to a forging process, and particularly relates to a multi-sheet aluminum alloy hub forging process.
Background
To meet the requirements of service functions and markets, aluminum wheels have been constructed as a one-piece and multi-piece combination design. The combined aluminum wheels have two-piece type and three-piece type, and several parts of the wheel are made by forging and spinning process and connected with titanium bolts.
The multi-piece hub in the current market has high production technology content, is divided into a front piece rim, a rear piece rim and a middle piece spoke, and is assembled and fixed by screws, and the assembled rim is excellent in strength, quality and appearance. However, because the hub is not integrally formed, the sealing performance of the joint of the front, middle and rear three-piece connection is poor, air leakage is easy, and in addition, because a plurality of parts of the multi-piece hub are independently forged, the central points of the parts cannot be in an absolute straight line during installation or assembly, and the transverse and radial runout is poor; in addition, the heat dissipation performance of the conventional multi-piece hub is poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to disclose a multi-sheet aluminum alloy hub forging process.
Technical scheme
A multi-sheet aluminum alloy hub forging process comprises the following steps:
A. melting A356.2 aluminum ingot and scrap wheel into molten aluminum in proportion, blending, degassing, refining, forging,
wherein, the mass ratio of the aluminum ingot is 60-70%, and the waste wheel is 30-40%;
B. respectively forging blanks of the front and rear piece of wheel rims and the middle piece of wheel spokes;
C. carrying out heat treatment on the forged blank to ensure various properties of the product;
D. machining the blank to meet the size requirement;
E. coating or electroplating the surface;
F. and assembling and fastening the front and rear wheel rims and the middle wheel spoke.
In the preferred embodiment of the invention, the alloy prepared in the step A contains 0.45-0.5% of Mg, 1% of Cu and the balance of Al and impurities which cannot be removed.
In the preferred embodiment of the invention, the heat treatment in the step C comprises the steps of firstly preserving heat at 440-460 ℃ for 10-14 h, preferably at 450 ℃ for 12h, homogenizing the product, then normally dissolving the product, preserving heat at 170-190 ℃ for 4-5 h, preferably at 180 ℃ for 4.5h, and carrying out overaging treatment.
In the preferred embodiment of the present invention, the heat treatment in step C is carried out in a homogenizing heat treatment furnace.
Advantageous effects
In the smelting process, the aluminum ingot, the waste wheel and the aluminum scraps in the raw materials are melted in proportion, and the intermediate alloy is added for blending, so that the contents of Mn and Cu in the aluminum water are improved, the internal structure performance is optimized, and the strength of the finished product is improved. When a blank is forged, the hub wheel spoke plate surface is subjected to strong cooling and accelerating to enable the structure to be more compact, higher product mechanical performance is obtained, fine gas generated by cooling aluminum liquid is artificially transferred to the position of a rim, and the structure is enabled to be more compact than that of a low-pressure rim through high-temperature spinning of the rim, so that the forging performance of the product is ensured, the internal defects of the product are reduced, and the high-strength product is obtained. The product is subjected to heat treatment by using the homogenization and overaging heat treatment process, so that the mechanical property of the product is greatly improved.
Detailed Description
The present invention will be described in detail below with reference to examples to enable those skilled in the art to better understand the present invention, but the present invention is not limited to the following examples.
Unless otherwise defined, terms (including technical and scientific terms) used herein should be construed to have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
A multi-sheet aluminum alloy hub forging process comprises the following steps:
(1) melting an A356.2 aluminum ingot and a scrap wheel according to a proportion (60 percent of the aluminum ingot and 40 percent of the scrap wheel) into molten aluminum, and forging blanks of front and rear rims and middle spokes respectively after alloy blending and degassing refining treatment, wherein the content of Mg in the molten aluminum is 0.45 percent and the content of Cu in the molten aluminum is 1 percent;
(2) carrying out heat treatment on the forged blank, carrying out heat preservation at 440 ℃ for 10h to carry out homogenization treatment on the product, then carrying out normal solid solution at 170 ℃, and carrying out heat preservation for 4 h;
(3) machining the blank, and coating or electroplating the surface of the blank;
(4) and assembling and fastening the front and rear wheel rims and the middle wheel spoke.
The detection performance of the product is shown in the following table 1:
example 2
A multi-sheet aluminum alloy hub forging process comprises the following steps:
(1) melting an A356.2 aluminum ingot and a waste wheel according to a proportion (65 percent of the aluminum ingot and 35 percent of the waste wheel) into molten aluminum, and forging blanks of front and rear rims and middle spokes respectively after alloy blending and degassing refining treatment, wherein the content of Mg in the molten aluminum is 0.46 percent and the content of Cu in the molten aluminum is 1 percent;
(2) carrying out heat treatment on the forged blank, carrying out heat preservation at 460 ℃ for 14h to carry out homogenization treatment on the product, then carrying out normal solid solution, and carrying out heat preservation at 190 ℃ for 5 h;
(3) machining the blank, and coating or electroplating the surface of the blank;
(4) and assembling and fastening the front and rear wheel rims and the middle wheel spoke.
The product has the following detection performance in the following table 2:
serial number Tensile strength (MPa) Yield strength (MPa) Elongation (delta%)
1# 248.9 139.6 15.3
2# 247.2 135.4 15.8
3# 248.2 138.6 14.8
4# 246.5 137.5 15.1
5# 248.5 138.7 14.7
Example 3
A multi-sheet aluminum alloy hub forging process comprises the following steps:
(1) melting an A356.2 aluminum ingot and a waste wheel according to a proportion (70 percent of the aluminum ingot and 30 percent of the waste wheel) into molten aluminum, and forging blanks of front and rear rims and middle spokes respectively, wherein the content of Mg in the molten aluminum is 0.5 percent and the content of Cu in the molten aluminum is 1 percent after alloy blending and degassing refining treatment;
(2) carrying out heat treatment on the forged blank, carrying out heat preservation at 450 ℃ for 12h to carry out homogenization treatment on the product, then carrying out normal solid solution, and carrying out heat preservation at 180 ℃ for 4.5 h;
(3) machining the blank, and coating or electroplating the surface of the blank;
(4) and assembling and fastening the front and rear wheel rims and the middle wheel spoke.
The product has the following detection performance in the following table 3:
serial number Tensile strength (MPa) Yield strength (MPa) Elongation (delta%)
1# 251.2 140.2 15.7
2# 250.7 143.6 14.8
3# 248.8 147.2 13.9
4# 247.2 151.2 15.6
5# 254.2 147.3 15.1
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims (5)

1. A multi-sheet aluminum alloy hub forging process is characterized by comprising the following steps:
A. melting an A356.2 aluminum ingot and a waste wheel into molten aluminum in proportion, blending the molten aluminum, degassing and refining the molten aluminum, and forging the molten aluminum, wherein the mass ratio of the molten aluminum to the waste wheel is 60-70% and the mass ratio of the molten aluminum to the waste wheel is 30-40%;
B. respectively forging blanks of the front and rear piece of wheel rims and the middle piece of wheel spokes;
C. carrying out heat treatment on the forged blank to ensure various properties of the product;
D. machining the blank to meet the size requirement;
E. coating or electroplating the surface;
F. and assembling and fastening the front and rear wheel rims and the middle wheel spoke.
2. The multi-piece aluminum alloy hub forging process of claim 1, wherein: and C, blending the alloy in the step A, wherein the content of Mg in the molten aluminum is 0.45-0.5%, the content of Cu is 1%, and the balance is Al and impurities cannot be removed.
3. The multi-piece aluminum alloy hub forging process of claim 1, wherein: and C, performing heat treatment in the step C, wherein the heat preservation is performed at 440-460 ℃ for 10-14 h to perform homogenization treatment on the product, then the normal solid solution treatment is performed, the heat preservation is performed at 170-190 ℃ for 4-5 h, and the overaging treatment is performed.
4. The multi-piece aluminum alloy hub forging process of claim 1, wherein: and C, performing heat treatment, namely performing homogenization treatment on the product by keeping the temperature of 450 ℃ for 12h, performing normal solid solution treatment, keeping the temperature of 180 ℃ for 4.5h, and performing overaging treatment.
5. The multi-piece aluminum alloy hub forging process of claim 3 or 4, wherein: the homogenization treatment in step C is carried out in a homogenization heat treatment furnace.
CN201911375888.6A 2019-12-27 2019-12-27 Multi-sheet aluminum alloy hub forging process Pending CN111001993A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911375888.6A CN111001993A (en) 2019-12-27 2019-12-27 Multi-sheet aluminum alloy hub forging process

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Application Number Priority Date Filing Date Title
CN201911375888.6A CN111001993A (en) 2019-12-27 2019-12-27 Multi-sheet aluminum alloy hub forging process

Publications (1)

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CN111001993A true CN111001993A (en) 2020-04-14

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4479293A (en) * 1981-11-27 1984-10-30 United Technologies Corporation Process for fabricating integrally bladed bimetallic rotors
CN103774007A (en) * 2014-01-09 2014-05-07 马鞍山市恒毅机械制造有限公司 High-magnesium aluminum alloy material for wheel hubs and preparation method thereof
CN104439909A (en) * 2014-09-11 2015-03-25 连云港宝石精密重工科技有限公司 Aluminum alloy hub forging method
CN106756301A (en) * 2016-12-06 2017-05-31 江苏凯特汽车部件有限公司 A kind of semi-solid-state shaping full-sized car manufacture method of tough aluminium alloy wheel hub high
CN107604218A (en) * 2017-09-23 2018-01-19 安徽福斯特铝制品股份有限公司 A kind of forging method of aluminium alloy wheel hub
CN109022849A (en) * 2018-09-29 2018-12-18 江苏亚太安信达铝业有限公司 A kind of high-strength aluminum alloy and its application for forging truck hub

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4479293A (en) * 1981-11-27 1984-10-30 United Technologies Corporation Process for fabricating integrally bladed bimetallic rotors
CN103774007A (en) * 2014-01-09 2014-05-07 马鞍山市恒毅机械制造有限公司 High-magnesium aluminum alloy material for wheel hubs and preparation method thereof
CN104439909A (en) * 2014-09-11 2015-03-25 连云港宝石精密重工科技有限公司 Aluminum alloy hub forging method
CN106756301A (en) * 2016-12-06 2017-05-31 江苏凯特汽车部件有限公司 A kind of semi-solid-state shaping full-sized car manufacture method of tough aluminium alloy wheel hub high
CN107604218A (en) * 2017-09-23 2018-01-19 安徽福斯特铝制品股份有限公司 A kind of forging method of aluminium alloy wheel hub
CN109022849A (en) * 2018-09-29 2018-12-18 江苏亚太安信达铝业有限公司 A kind of high-strength aluminum alloy and its application for forging truck hub

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