CN100554485C - A kind of heat treating method of high-efficient high performance A356 alloy low-pressure casting wheel hub - Google Patents
A kind of heat treating method of high-efficient high performance A356 alloy low-pressure casting wheel hub Download PDFInfo
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- CN100554485C CN100554485C CNB2006100176004A CN200610017600A CN100554485C CN 100554485 C CN100554485 C CN 100554485C CN B2006100176004 A CNB2006100176004 A CN B2006100176004A CN 200610017600 A CN200610017600 A CN 200610017600A CN 100554485 C CN100554485 C CN 100554485C
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Abstract
The present invention relates to a kind of heat treating method of high-efficient high performance A356 alloy low-pressure casting wheel hub, may further comprise the steps: with wheel hub under 535-545 ℃ of temperature solid solution 5-7 hour, carry out quench treatment after the solid solution, carrying out the low temperature preageing after the quenching immediately handles, carry out ageing treatment behind the low temperature preageing immediately, the temperature of ageing treatment is 175-185 ℃, and aging time is 3-5 hour.Heat treating method of the present invention has shortened solution treatment time and aging time greatly, simultaneously, the strength property of A356 alloy low-pressure casting wheel hub is significantly improved, and has shortened heat treatment cycle greatly, improve production efficiency, increased substantially the mechanical property of alloy.
Description
Technical field
The present invention relates to a kind of heat treating method of the A356 of being applicable to alloy low-pressure casting wheel hub, belong to the metal heat treatmet field.
Background technology
Along with China's accession to WTO, China will be the biggest in the world, fastest-rising automobile market at the 5-10 in future, the energy, environment and safety are the three big problems that various countries, the world today very pay close attention to, and developing of automobile industry is closely related with this three big problem with application popularization.Along with energy-saving and cost-reducing require constantly surging of Hyundai Motor, safety and environmental regulation are strict day by day, and the light-weighted requirement of automobile is more urgent, and the light weight that aluminium alloy had, the intensity height, good moldability, moderate cost, the advantage that the rate of recovery is high, to reducing automotive dead weight, reduce oil consumption, alleviate environmental pollution and improve the processing property aspect and have great significance, become the preferred material of automotive industry.Important spare part as automobile---wheel hub, its calorize rate has reached 60-70% at present, expects 2010, and the calorize rate of wheel hub will reach 72-78%.Aluminium alloy wheel hub mainly contains two kinds of manufacture method at present, casting and forging method, in recent years, though reflectal tip hub ratio cast aluminium alloy rate of growth is faster, but reason owing to aspects such as cost and yield rates, expect 2010, aluminium alloy wheel hub production is still based on casting, and wherein the low-pressure casting wheel hub accounts for 75% of aluminium alloy wheel hub output.With respect to the reflectal wheel hub, low pressure casting aluminum alloy wheel hub intensity is on the low side, and manufacturers such as German high-grade automobile such as Audi are higher to the requirement of strength of wheel hub, require yield strength to reach 200MPa above (wheel rim sampling from the wheel hub), general low pressure casting aluminum alloy wheel hub performance does not also reach requirement.At present, the heat treating method of A356 alloy low pressure casting aluminum alloy is after high temperature carries out solution treatment, quench and to carry out complete artificial aging, so not only the production time very long, and the yield strength of wheel hub is on the low side, far away can not high-grade automobile to the requirement of strength of wheel hub.
Summary of the invention
The object of the present invention is to provide a kind of heat treating method of high-efficient high performance A356 alloy low-pressure casting wheel hub, shorten the production time to reach greatly, and the higher purpose of yield strength.
In order to achieve the above object, technical program of the present invention lies in adopting the firm heat treating method of a kind of high-efficient high performance A356 alloy low-pressure casting wheel, may further comprise the steps: with wheel hub under 535-545 ℃ of temperature solid solution 5-7 hour, carry out quench treatment after the solid solution, carrying out the low temperature preageing after the quenching immediately handles, low temperature preageing temperature is 100 ℃-130 ℃, the low temperature preageing time is 0.5-3 hour, carry out ageing treatment behind the low temperature preageing immediately, the temperature of ageing treatment is 175-185 ℃, and aging time is 3-5 hour.
Described quenching temperature is a room temperature.
Adopt the firm heat treating method of A356 alloy low-pressure casting wheel of the present invention, its heat treatment time is 10.5-13 hour, compares with the heat treating method that existing A356 alloy low-pressure casting wheel is firm, and heat treatment time has shortened 5-7.5 hour, shorten the production cycle greatly, improved production efficiency.In the same production cycle, the firm unit elongation (going up the wheel rim sampling) of the performance standard code A356 of country alloy low-pressure casting wheel must not be lower than 7%, adopt the unit elongation of the alloy of heat treating method of the present invention can be stabilized between the 10-12%, be up to state standards fully, tensile strength of alloys has reached 308MPa, and more existing heat treating method has improved 14%, and yield strength is brought up to 246MPa, improved 38%, yield strength can satisfy the firm performance requriements of German high-grade car wheel fully.Heat treating method of the present invention has shortened solution treatment time and aging time, simultaneously, the firm strength property of A356 alloy low-pressure casting wheel is significantly improved, and has shortened heat treatment cycle greatly, improve production efficiency, increased substantially the mechanical property of alloy.
Take turns firm manufacturing process: adopt the Al-10Sr master alloy to go bad during melting, and adding 0.2%Al-5Ti-1C carries out thinning processing, behind the modifying-refining, liquation is poured air injection machine into and is carried out low-pressure casting, after the casting, the firm last wheel rim of trailing wheel is taken a sample, (the firm model of sampling wheel is 330).
Table 1A356 alloy low-pressure casting is taken turns firm two-stage time effect and is optimized processing parameter
Sample is processed into the standard hardness sample after the thermal treatment, carries out mechanics performance determining, and the Mechanics Performance Testing of alloy the results are shown in Table 2:
Alloy mechanical property contrast under table 2 method of the present invention and the existing method
(annotate: I, II, III are three experimental programs of the present invention)
As can be seen from Table 2, method of the present invention can significantly improve the yield strength of alloy, and tensile strength also makes moderate progress in addition, and unit elongation is more stable.
Be the circulation ratio of results novel process, the scheme III in our his-and-hers watches 2 has carried out repeated experiment, and its experiment the results are shown in Table 3:
Scheme III Mechanics Performance Testing result in table 3 table 2
| Sequence number | Tensile strength/MPa | Yield strength/MPa | Unit elongation/% |
| 1 | 310 | 250 | 9 |
| 2 | 310 | 245 | 10 |
| 3 | 305 | 245 | 12 |
| On average | 308 | 246 | 10 |
By table 3 as seen, under scheme III, tensile strength of alloys is brought up to 308MPa by the 280MPa of existing method, and increase rate reaches 10%; Yield strength is brought up to 246MPa by 180MPa, and increase rate reaches 38%, and unit elongation is more stable, and satisfies 7% unit elongation standard of national A356 low-pressure casting wheel hub fully.
Embodiment
Embodiment 1
The heat treating method of the high-efficient high performance A356 alloy low-pressure casting wheel hub in the present embodiment is: solid solution is 5 hours under 535 ℃ temperature, at room temperature quench, carry out the low temperature preageing after the quenching immediately, sample is incubated in batches under 100 ℃ temperature, soaking time is: 1 hour, carry out ageing treatment after the insulation immediately, 175 ℃ of aging temps, aging time 5 hours.
Embodiment 2
The heat treating method of the high-efficient high performance A356 alloy low-pressure casting wheel hub in the present embodiment is: solid solution is 6 hours under 540 ℃ temperature, at room temperature quench, carry out the low temperature preageing after the quenching immediately, sample is incubated in batches under 115 ℃ temperature, soaking time is: 2 hours, carry out ageing treatment after the insulation immediately, 180 ℃ of aging temps, aging time 4 hours.
Embodiment 3
The heat treating method of the high-efficient high performance A356 alloy low-pressure casting wheel hub of present embodiment is: solid solution is 7 hours under 545 ℃ temperature, at room temperature quench, carry out the low temperature preageing after the quenching immediately, sample is incubated in batches under 135 ℃ temperature, soaking time is: 3 hours, carry out ageing treatment after the insulation immediately, 185 ℃ of aging temps, aging time 3 hours.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (2)
1, a kind of heat treating method of high-efficient high performance A356 alloy low-pressure casting wheel hub, it is characterized in that: may further comprise the steps: with wheel hub solid solution 5 hours under 535-545 ℃ of temperature, carry out quench treatment after the solid solution, carrying out the low temperature preageing after the quenching immediately handles, low temperature preageing temperature is 100 ℃-130 ℃, and the low temperature preageing time is 1 hour, carries out ageing treatment behind the low temperature preageing immediately, the temperature of ageing treatment is 175-185 ℃, and aging time is 3-5 hour.
2, the heat treating method of high-efficient high performance A356 alloy low-pressure casting wheel hub according to claim 1, it is characterized in that: described quenching temperature is a room temperature.
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| CNB2006100176004A CN100554485C (en) | 2006-04-03 | 2006-04-03 | A kind of heat treating method of high-efficient high performance A356 alloy low-pressure casting wheel hub |
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| CNB2006100176004A CN100554485C (en) | 2006-04-03 | 2006-04-03 | A kind of heat treating method of high-efficient high performance A356 alloy low-pressure casting wheel hub |
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| CN100554485C true CN100554485C (en) | 2009-10-28 |
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Families Citing this family (17)
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| JP2011208253A (en) * | 2010-03-30 | 2011-10-20 | Honda Motor Co Ltd | Aluminum die-cast alloy for vehicle material |
| CN101885051A (en) * | 2010-07-16 | 2010-11-17 | 天津市奥亚机电有限公司 | Aluminum alloy low-pressure casting process for transfer case housing of concrete pump truck |
| CN101966575B (en) * | 2010-11-13 | 2012-08-08 | 河南理工大学 | Process for casting aluminum alloy wheel and heat treatment process |
| CN102764873A (en) * | 2011-05-03 | 2012-11-07 | 远轻铝业（中国）有限公司 | Low-pressure casting process for turbocharger compressor casing |
| CN102242325A (en) * | 2011-07-12 | 2011-11-16 | 中南大学 | Heat treatment technology for markedly raising comprehensive performance of aluminium alloy |
| CN102433522A (en) * | 2011-12-02 | 2012-05-02 | 华南理工大学 | Grading aging heat treatment method for A356 alloy |
| CN103014569B (en) * | 2012-12-24 | 2015-04-08 | 中国科学院金属研究所 | Heat treatment method of aluminium alloy sleeper beam material |
| CN103911504B (en) * | 2014-03-20 | 2016-01-20 | 浙江今飞凯达轮毂股份有限公司 | The apparatus for continous heat treatment of wheel hub base |
| CN104561857A (en) * | 2014-12-30 | 2015-04-29 | 江苏理工学院 | Two-step aging heat treatment technology for aluminum alloy |
| CN104630666A (en) * | 2015-01-30 | 2015-05-20 | 柳州市同进汽车零部件制造有限公司 | Heat treatment process of aluminum alloy automobile hub |
| CN104762536A (en) * | 2015-02-02 | 2015-07-08 | 安徽省斯特嘉汽车零部件有限公司 | Preparation method of magnesium borate whisker-reinforced A356 aluminum alloy wheel hub |
| CN105543740B (en) * | 2015-12-14 | 2017-10-03 | 百色学院 | Improve the Technology for Heating Processing of corrosive protection of aluminium alloy corrosion energy |
| CN105543739A (en) * | 2016-02-05 | 2016-05-04 | 中信戴卡股份有限公司 | Thermal treatment method and equipment for manufacturing aluminum-alloy automobile steering knuckle |
| CN105936971A (en) * | 2016-04-30 | 2016-09-14 | 三门县职业中等专业学校 | Hot processing technology for automobile hub |
| CN108823446A (en) * | 2018-07-16 | 2018-11-16 | 山东华宇合金材料有限公司 | A kind of process improving A356.2 Mechanical Properties of Aluminum Alloys |
| CN113967668B (en) * | 2021-09-22 | 2022-06-17 | 湖南大学 | Processing method for improving forming precision of 7A85 alloy extruded sheet large-size cylindrical part |
| CN116145055A (en) * | 2023-01-30 | 2023-05-23 | 中信戴卡股份有限公司 | Casting and heat treatment integrated manufacturing method and assembly line equipment for aluminum alloy wheel |
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Application publication date: 20071010 Assignee: Kunshan Liufeng Machinery Industry Co., Ltd. Assignor: Zhengzhou University Contract record no.: 2010320000215 Denomination of invention: High effective heat treatment method for wheel hub founded at low pressure from high performance A356 alloy Granted publication date: 20091028 License type: Exclusive License Record date: 20100312 |
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