CN100457956C - Double-temperature heat treating process for Al-Si alloy piston material - Google Patents
Double-temperature heat treating process for Al-Si alloy piston material Download PDFInfo
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- CN100457956C CN100457956C CNB2007100498958A CN200710049895A CN100457956C CN 100457956 C CN100457956 C CN 100457956C CN B2007100498958 A CNB2007100498958 A CN B2007100498958A CN 200710049895 A CN200710049895 A CN 200710049895A CN 100457956 C CN100457956 C CN 100457956C
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Abstract
A double-temperature heat treatment technology for Al-Si alloy piston material belongs to a heat-treatment method of metal materials and, in particular, relates to an artificial aging treatment. The double-temperature treatment procedure includes: after casting, hardening directly with residual casting heat and by reheating with a pit-type heating furnace and thereafter performing artificial double-temperature aging treatment in a pit-type aging furnace. After a first temperature phase of 170 DEG C (low temperature) for three hours and then a second temperature phase at 260 DEG C (high temperature) for one hour, the material can be taken out of the furnace for air cooling and the whole heat treatment process ends. The first temperature phase guarantees the hardness and strength of the piston material; certain performance indexes of the pistons can be improved to meet higher technological requirement by adjusting the temperature and the time of the second temperature phase. The method can improve production capacity of heat treatment, save energy, lower production cost and reduce expenditure of equipment maintenance. The period of heat treatment is shorted by approximately 46 percent compared with that of single-temperature technology.
Description
Affiliated technical field
The present invention relates to the heat treating method of metallic substance, relate in particular to the thermal treatment artificial aging technology of Al-Si alloy piston material.
Background technology
Single warm treatment process is adopted in the thermal treatment of existing Al-Si alloy piston material.Utilize afterheat in casting direct quenching or casting back to reheat quenching after the casting at pit furnace, the back of quenching is carried out artificial aging at well formula aging oven and is handled, and timeliness is fixed in a certain temperature (for example: 220 ℃) and carries out certain hour insulation (for example: 8 hours) and finish artificial aging and handle.Come out of the stove after the timeliness and carry out naturally cooling, finish the thermal treatment whole process of piston material.Improve the every performance index of piston by heat-treatment quenching+artificial aging, make it to reach processing requirement.The shortcoming of this method is that the artificial aging process is long, the production cost height, and heat treatment cycle is long, the energy consumption height.
Summary of the invention
The purpose of this invention is to provide a kind of novel treatment process, make the performance raising of alloy piston material and can artificially control the production cost reduction.
The objective of the invention is to reach like this:
The two warm treatment process of a kind of Al-Si alloy piston material, utilize afterheat in casting direct quenching or casting back to reheat quenching after the casting at pit furnace, carrying out artificial aging at well formula aging oven after quenching handles, it is characterized in that: artificial aging is handled two warm hardening processes of carrying out, 170 ℃ of the first temperature section low temperature, be incubated 3 hours, finish the timeliness of first temperature section, continue to be warming up to 260 ℃ of the second temperature section high temperature, be incubated 1 hour, come out of the stove subsequently and carry out air cooling, finish the thermal treatment whole process of piston material.
Advantage of the present invention is:
Two warm processing are adjusted the performance of alloy piston by the temperature of two temperature sections of adjustment artificial aging process.Compare with single warm hardening technology, the performance of alloy piston reaches requirements at the higher level.The while save energy, production cost reduces, and production capacity of heat treatment improves, and the thermal treatment cost reduces, and the maintenance of equipment expense reduces.Compare with single warm treatment process, the heat treatment cycle of two warm treatment process shortens 46% approximately.
Description of drawings
Fig. 1 is the single warm treatment process graphic representation of afterheat in casting for piston direct quenching.
Fig. 2 reheats single warm treatment process graphic representation that quenches for piston at pit furnace.
Fig. 3 is the two warm treatment process graphic representations of afterheat in casting for piston direct quenching.
Fig. 4 reheats two warm treatment process graphic representations that quench for piston at pit furnace.
Embodiment
Shown in accompanying drawing 3 or 4, the two warm treatment process processes of Al-Si alloy piston material are to utilize afterheat in casting direct quenching or casting back to reheat quenching at pit furnace after the casting, and the back of quenching is carried out artificial two warm hardening at well formula aging oven and handled.170 ℃ of the first temperature section temperature (positive and negative 5 ℃) are all adopted in the thermal treatment of two temperature artificial aging, are incubated 3 hours, 260 ℃ of the second temperature section temperature (positive and negative 5 ℃), soaking time 1 hour.Come out of the stove subsequently and carry out air cooling, finish the thermal treatment whole process of piston material.By quenching+two temperature artificial aging treatment process, make the Al-Si alloy piston material reach every performance index of processing requirement.
The two warm processing of Al-Si alloy material piston back performance index are as follows: hardness: HB100～130; Tensile strength: σ b 〉=196MPa, 300 ℃ 〉=100MPa of σ; Linear expansivity: α room temperature-200 ℃≤21 * 10
-6/ ℃, α room temperature-300 ℃≤22 * 10
-6/ ℃; Volume stability: δ≤0.025%D.
The artificial aging first temperature section timeliness guarantees that piston material reaches higher hardness, intensity; The second temperature section timeliness guarantees that the every performance of piston reaches piston processing requirement performance index.Can improve some performance index of piston by the temperature-time of adjusting second temperature section, satisfy the Al-Si alloy piston material and reach higher processing requirement.Improve production capacity of heat treatment simultaneously, save energy reduces production costs, and reduces the maintenance of equipment expense.Compare with single warm treatment process, the heat treatment cycle of two warm treatment process shortens 46% approximately.
The traditional technology of single warm processing is shown as accompanying drawing 1 or 2.The warm treatment process process of Al-Si alloy piston material list is to utilize afterheat in casting direct quenching or casting back to reheat quenching at pit furnace after the casting, and the back of quenching is carried out artificial aging at well formula aging oven and handled.The performance index of the alloy piston of the single warm processing of employing are as follows: hardness: HB100～130; Tensile strength: σ b 〉=196MPa, 300 ℃ 〉=100MPa of σ; Linear expansivity: α room temperature-200 ℃≤21 * 10
-6/ ℃, α room temperature-300 ℃≤22 * 10
-6/ ℃; Volume stability: δ≤0.03%D.
Guarantee that some performance of piston can only adopt the way that prolongs the piston artificial aging time if will improve.Therefore, the warm treatment process artificial aging of Al-Si alloy material piston list process is long at present, the production cost height, and heat treatment cycle is long, the energy consumption height.
Claims (1)
1, the two warm treatment process of a kind of Al-Si alloy piston material, utilize afterheat in casting direct quenching or casting back to reheat quenching after the casting at pit furnace, carrying out artificial aging at well formula aging oven after quenching handles, it is characterized in that: artificial aging is handled and is carried out two warm hardening processes, and 170 ℃ of the first temperature section low temperature are incubated 3 hours, continue to be warming up to 260 ℃ of the second temperature section high temperature, be incubated 1 hour, come out of the stove subsequently and carry out air cooling, finish the thermal treatment whole process of piston material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100498958A CN100457956C (en) | 2007-08-31 | 2007-08-31 | Double-temperature heat treating process for Al-Si alloy piston material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100498958A CN100457956C (en) | 2007-08-31 | 2007-08-31 | Double-temperature heat treating process for Al-Si alloy piston material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101117697A CN101117697A (en) | 2008-02-06 |
| CN100457956C true CN100457956C (en) | 2009-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100498958A Expired - Fee Related CN100457956C (en) | 2007-08-31 | 2007-08-31 | Double-temperature heat treating process for Al-Si alloy piston material |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445898B (en) * | 2008-12-26 | 2010-06-02 | 成都银河动力股份有限公司 | Low temperature heat processing method of single feeder head eutectic Al-Si alloy piston material |
| CN117483561A (en) * | 2018-08-08 | 2024-02-02 | 宝山钢铁股份有限公司 | Method for manufacturing hot-stamped component with aluminum-silicon alloy coating and hot-stamped component |
| CN112593061A (en) * | 2020-11-18 | 2021-04-02 | 贵州鼎成熔鑫科技有限公司 | Quenching and tempering method for hydraulic plunger pump and motor double-metal cylinder body spline |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010010242A1 (en) * | 1998-09-08 | 2001-08-02 | United States Of America As Represented By The National Aeronautics And Space Administration | Process for producing a cast article from a hypereutectic aluminum-silicon alloy |
| CN1693507A (en) * | 2005-05-20 | 2005-11-09 | 东北轻合金有限责任公司 | Manufacturing method of aluminium alloy piston |
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2007
- 2007-08-31 CN CNB2007100498958A patent/CN100457956C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010010242A1 (en) * | 1998-09-08 | 2001-08-02 | United States Of America As Represented By The National Aeronautics And Space Administration | Process for producing a cast article from a hypereutectic aluminum-silicon alloy |
| CN1693507A (en) * | 2005-05-20 | 2005-11-09 | 东北轻合金有限责任公司 | Manufacturing method of aluminium alloy piston |
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| Publication number | Publication date |
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| CN101117697A (en) | 2008-02-06 |
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Owner name: CHENGDU GALAXY POWER CO., LTD. Free format text: FORMER OWNER: CHENGDU GALAXIE DYNAMIC CO.,LTD Effective date: 20110620 |
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Effective date of registration: 20110620 Address after: Longqiao Town Village Puwen Xindu District of Chengdu city of Sichuan Province in 610505 Patentee after: Chengdu Galaxy Power Co., Ltd. Address before: 610505 dragon bridge town, Xindu District, Sichuan, Chengdu Patentee before: Chengdu Galaxie Dynamic Co.,Ltd |
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