CN102758154A - Heat treatment technique of Al-Mg-Si alloy - Google Patents
Heat treatment technique of Al-Mg-Si alloy Download PDFInfo
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- CN102758154A CN102758154A CN201210262064XA CN201210262064A CN102758154A CN 102758154 A CN102758154 A CN 102758154A CN 201210262064X A CN201210262064X A CN 201210262064XA CN 201210262064 A CN201210262064 A CN 201210262064A CN 102758154 A CN102758154 A CN 102758154A
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Abstract
The invention belongs to the field of alloys, and particularly relates to a heat treatment technique of an Al-Mg-Si alloy, which comprises the following steps: 1 aluminum bar smelting, 2 refining, and 3 aging, wherein in the step 2, the refining is carried out for 30 minutes, and in the third step, the aging is carried out at 170 DEG C for 4 hours. The products produced by the improved heat treatment technique of an Al-Mg-Si alloy can pass the crushing test, and the strength and toughness are qualified. The crash box product is completely qualified in the subsequent car crash test.
Description
Technical field
The invention belongs to the alloy field, relate to a kind of thermal treatment process that satisfies aluminum automobile bumper energy absorption box conquassation test, being specially Al-Mg-Si is heat treatment of alloy technology.
Background technology
Automobile lightweight development, duraluminum has moderate, the light weight of intensity because of it, and characteristics such as easy-formation are adaptable across the automobile light-weight design; Al-Mg-Si is that alloy can be obtained suitable intensity through the change of thermal treatment process, keeps certain impelling strength; Al-Mg-Si is that the alloy aging strengthening principle is mainly α (Al base supersaturated solid solution) → GP district → β " → β ' → β, its change procedure and complicacy thereof, research proof aging temp has decisive influence to the shape and the size of its timeliness precipitation strength phase.The compression set on the direction of extrusion of aluminum automobile bumper energy absorption box portioned product test request, deformation extent is 45% * finished product length (290 millimeters), standard DBL4919-2009 is satisfied in the product tearing tendency.Energy-absorbing box product is when prolonging direction of extrusion compression after deliberation, and big lumpiness impurity phase and strengthening phase in the aluminum substrate all can become focal point of stress, in deformation process, are prone to form the crackle tendency, cause the product cracking.
Summary of the invention
The invention provides a kind of aluminum automobile bumper energy absorption box material under the proof strength situation, the Al-Mg-Si that satisfies the conquassation test is a heat treatment of alloy technology.
For solving the problems of the technologies described above, Al-Mg-Si of the present invention is a heat treatment of alloy technology, comprises the steps: the first step, the aluminium bar melting; Second step, refining; The 3rd step, timeliness.
The purified time is 30 minutes in said second step.The temperature of timeliness is 170 ℃ in said the 3rd step, and duration is 4 hours.
Al-Mg-Si of the present invention is that heat treatment of alloy technology is passed through the control of aluminium liquid fusion-casting process is reduced impurity phase amount and size in the aluminium bar.Concrete technology is for increasing by one refining procedure, proper extension refining time simultaneously, made aluminium bar through homogenizing after amplify 100 times of observations, the mutually shared visual field of impurity hard to tolerate area＜0.5%; Through changing aging thermal treating process, make the material ageing strengthening with β " Xiang Weizhu, control acicular β ' and form quantity, impurity phase and strengthening phase are controlled in the certain size scope in the aluminum substrate thereby make, and reduce stress concentration effect.Concrete parameter is to be organized in after the product timeliness to observe no needle-like strengthening phase in 100 times of visual fields, adopts low temperature aging for this reason, the formation of control β ' phase.Product that technology is produced after the improvement all can be through the conquassation test, and intensity and toughness are all qualified simultaneously.Energy-absorbing box product is follow-up qualified fully through the test of colliding.
Description of drawings
Fig. 1 is the heat treatment of alloy process flow sheet for Al-Mg-Si of the present invention.
Embodiment
Is that heat treatment of alloy technology is done further explain below in conjunction with accompanying drawing to Al-Mg-Si of the present invention.
As shown in Figure 1, Al-Mg-Si of the present invention is a heat treatment of alloy technology, comprises the steps: the first step, the aluminium bar melting; Second step, refining; The 3rd step, timeliness.
The purified time is 30 minutes in second step.The temperature of timeliness is 170 ℃ in the 3rd step, and duration is 4 hours.
Concrete testing sequence:
1. increase by one refining procedure in the aluminium bar fusion process, 20 minutes single track refining procedure time extended to 30 minutes during with former technology;
2. high power detects in-house impurity phase amount and shape meets the requirements after the aluminium bar homogenizing;
3. with this aluminium bar extruding, process energy-absorbing box goods;
4. adopt 170 ℃, 4h timeliness, test material mechanical property; Finishing mandrel becomes 290mm length to carry out compression verification with oil press simultaneously.
Table 1 is to compare with the concrete test-results of former technology:
Table 1
Al-Mg-Si of the present invention is that heat treatment of alloy technology is passed through the control of aluminium liquid fusion-casting process is reduced impurity phase amount and size in the aluminium bar.Concrete technology is for increasing by one refining procedure, proper extension refining time simultaneously, made aluminium bar through homogenizing after amplify 100 times of observations, the mutually shared visual field of impurity hard to tolerate area＜0.5%; Through changing aging thermal treating process, make the material ageing strengthening with β " Xiang Weizhu, control acicular β ' and form quantity, impurity phase and strengthening phase are controlled in the certain size scope in the aluminum substrate thereby make, and reduce stress concentration effect.Concrete parameter is to be organized in after the product timeliness to observe no needle-like strengthening phase in 100 times of visual fields, adopts low temperature aging for this reason, the formation of control β ' phase.Product that technology is produced after the improvement all can be through the conquassation test, and intensity and toughness are all qualified simultaneously.Energy-absorbing box product is follow-up qualified fully through the test of colliding.
Below the preferred embodiment of the invention is specified; But the invention is not limited to said embodiment; Those of ordinary skill in the art also can make all modification that is equal to or replacement under the prerequisite of the invention spirit, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (3)
1.Al-Mg-Si be heat treatment of alloy technology, it is characterized in that, comprise the steps:
The first step, the aluminium bar melting;
Second step, refining;
The 3rd step, timeliness.
2. Al-Mg-Si according to claim 1 is a heat treatment of alloy technology, it is characterized in that, the purified time is 30 minutes in said second step.
3. Al-Mg-Si according to claim 1 is a heat treatment of alloy technology, it is characterized in that, the temperature of timeliness is 170 ℃ in said the 3rd step, and duration is 4 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210262064XA CN102758154A (en) | 2012-07-26 | 2012-07-26 | Heat treatment technique of Al-Mg-Si alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210262064XA CN102758154A (en) | 2012-07-26 | 2012-07-26 | Heat treatment technique of Al-Mg-Si alloy |
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| Publication Number | Publication Date |
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| CN102758154A true CN102758154A (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201210262064XA Pending CN102758154A (en) | 2012-07-26 | 2012-07-26 | Heat treatment technique of Al-Mg-Si alloy |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101284353A (en) * | 2008-06-06 | 2008-10-15 | 中国铝业股份有限公司 | Production process of ABS valve body material for cars |
| CN102312137A (en) * | 2011-09-09 | 2012-01-11 | 中兴通讯股份有限公司 | Aluminum-silicon-magnesium casted aluminum alloy and casting process thereof |
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2012
- 2012-07-26 CN CN201210262064XA patent/CN102758154A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101284353A (en) * | 2008-06-06 | 2008-10-15 | 中国铝业股份有限公司 | Production process of ABS valve body material for cars |
| CN102312137A (en) * | 2011-09-09 | 2012-01-11 | 中兴通讯股份有限公司 | Aluminum-silicon-magnesium casted aluminum alloy and casting process thereof |
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Application publication date: 20121031 |