WO2014038333A1 - Procédé de production d'un moulage en alliage d'aluminium - Google Patents

Procédé de production d'un moulage en alliage d'aluminium Download PDF

Info

Publication number
WO2014038333A1
WO2014038333A1 PCT/JP2013/071218 JP2013071218W WO2014038333A1 WO 2014038333 A1 WO2014038333 A1 WO 2014038333A1 JP 2013071218 W JP2013071218 W JP 2013071218W WO 2014038333 A1 WO2014038333 A1 WO 2014038333A1
Authority
WO
WIPO (PCT)
Prior art keywords
casting
cooling
temperature
aluminum alloy
mold
Prior art date
Application number
PCT/JP2013/071218
Other languages
English (en)
Japanese (ja)
Inventor
智史 南口
俊介 太田
徹 植木
剛志 中野
達也 増田
Original Assignee
日産自動車株式会社
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 日産自動車株式会社 filed Critical 日産自動車株式会社
Priority to JP2014534253A priority Critical patent/JP5907272B2/ja
Publication of WO2014038333A1 publication Critical patent/WO2014038333A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
    • B22D21/04—Casting aluminium or magnesium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D30/00—Cooling castings, not restricted to casting processes covered by a single main group
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon

Definitions

  • the present invention relates to a method for producing an aluminum alloy casting used for producing various aluminum alloy castings such as, for example, engine cylinder heads and cylinder blocks, and aluminum wheels.
  • Al—Si—Cu—Mg alloys such as AC2A, AC2B and AC4B defined by JIS are applied to aluminum alloy castings, and in order to obtain the required mechanical properties, T5 is applied after casting. , T6, and T7 are known to be heat treated.
  • Patent Document 1 Conventionally, as a manufacturing method of this type of aluminum alloy casting, for example, there is a method described in Patent Document 1.
  • the manufacturing method described in Patent Document 1 is such that after casting, the casting is taken out from the mold before the temperature is lowered and kept at the solution temperature, and then subjected to artificial age hardening after quenching. .
  • the present invention has been made in view of the above-described conventional situation.
  • the solution treatment process is abolished, and the equipment cost and energy consumption are reduced, and the residual strain is reduced even in the T5 heat treatment to reduce the T6.
  • Another object of the present invention is to provide a method for producing an aluminum alloy casting capable of obtaining a casting having characteristics that can be substituted for a T7 heat-treated product.
  • the method for producing an aluminum alloy casting of the present invention includes a step of forming an aluminum alloy casting using a mold, a step of cooling the casting taken out of the mold with a cooling fluid,
  • the present invention provides that the casting temperature at the start of cooling is (solidification completion temperature ⁇ 80) ° C. or more, the cooling rate is 30 ° C./min or more, and the casting at the end of cooling.
  • the temperature is equal to or lower than the processing temperature of the artificial age hardening performed thereafter, and the above configuration is a means for solving the conventional problems.
  • the solution treatment process is abolished, and the equipment cost and the energy consumption are reduced, and the residual strain is reduced even in the T5 heat treatment to reduce the T6 or T7 heat treatment. It is possible to obtain castings having characteristics that can be substituted for products.
  • Graph (A) showing the relationship between casting temperature and hardness at the start of cooling
  • Graph (B) showing the relationship between cooling rate and hardness
  • Graph (C) showing the relationship between casting temperature and hardness at the end of cooling It is. It is a graph explaining the residual strain reduction effect by cooling. It is sectional explanatory drawing which shows the cooling process of a casting. It is each graph (A) (B) which shows the change of the casting temperature in other embodiment of this invention. It is a graph explaining the tensile strength of each casting of a prior art example and the Example of this invention.
  • the method for producing an aluminum alloy casting according to the present invention includes a step of forming an aluminum alloy casting using a mold (S1 to S4), and cooling the casting taken out from the mold.
  • a step of cooling with a fluid (S6) and a step of performing artificial age hardening on the cast after cooling (S10) are provided.
  • the casting temperature at the start of cooling is set to (solidification completion temperature ⁇ 80) ° C. or higher.
  • the cooling rate is 30 ° C./min or more in the step of cooling the casting (S6).
  • the casting temperature at the end of cooling is set to be equal to or lower than the processing temperature of the artificial age hardening performed thereafter.
  • an inert gas such as argon gas or nitrogen gas, or a mist of cooling liquid is added to these gases.
  • a mixed fluid or the like can be used, but air is used as a more desirable embodiment.
  • a cylinder head of an automobile engine is illustrated as an aluminum alloy casting.
  • This cylinder head is made of an Al-Si-Cu-Mg alloy equivalent to AC2B specified by JIS, and uses a core for forming a hollow portion such as a water jacket, based on a low pressure casting method. To manufacture.
  • step S6 of cooling the cylinder head with a cooling fluid.
  • air is used as the cooling fluid, air quenching is used.
  • the gate is cut S9, and the process reaches an artificial age hardening treatment step S10. .
  • the cylinder head made of aluminum alloy is completed through natural cooling step S11 and inspection step S12.
  • FIG. 2 is a graph showing the relationship between the passage of time and the casting temperature in the method for producing an aluminum alloy casting of the present invention.
  • the casting temperature a at the start of cooling is set to (solidification completion temperature ⁇ 80) ° C. or higher.
  • FIG. 3 (B) shows the relationship between the cooling rate b and hardness defined when the casting temperature a at the start of cooling is between 420 ° C. and 200 ° C. According to the figure, it can be seen that the characteristics are greatly improved by air cooling at a cooling rate b of 30 ° C./min or more.
  • the threshold value of the casting temperature a at the start of cooling corresponds to (solidification completion temperature ⁇ 80) ° C. of the AC2B material.
  • finish of cooling is below the heat processing temperature d (215 degreeC as an example) of the artificial age hardening implemented after that.
  • FIG. 4 is a graph for explaining the effect of reducing residual strain by cooling.
  • the residual strain was calculated from the open casting strain using a strain gauge for the casting of the example in which air cooling was performed, the conventional casting in which water quenching was performed, and the conventional casting in which cooling was performed. According to the figure, it can be seen that the casting of the example in which air cooling was performed was able to reduce the residual strain by 60% compared with the conventional casting in which water quenching was performed.
  • FIG. 5 is an explanatory sectional view showing a casting cooling process.
  • the temperature (casting temperature a) of the cylinder head C at the start of cooling is measured using a non-contact type thermometer S.
  • the cylinder head C is cooled (air quenching) in the cooling booth B.
  • the temperature of the cylinder head C at the end of cooling (casting) using a non-contact type thermometer S is measured using a non-contact type thermometer S.
  • Measure temperature c the temperature of the cylinder head C at the end of cooling (casting) using a non-contact type thermometer S.
  • the cooling booth B has an exhaust pipe E opened upward on the upper side of the casing A.
  • the cooling booth B includes a plurality of air nozzles N toward the accommodated cylinder head C inside the casing A, and an exhaust fan F inside the exhaust pipe E.
  • the cylinder head C is forced by injecting air from each air nozzle N to the cylinder head C and exhausting the air in the housing by the exhaust fan F. Cooling.
  • the method for producing an aluminum alloy casting described in the above embodiment has the cooling start temperature a, the cooling rate b, and the cooling end temperature c within the respective ranges, so that the strength equal to that of water cooling can be achieved even with cooling by air. Improvement effect is obtained. Moreover, since the residual strain at the time of quenching can be reduced, even with the T5 heat treatment, material characteristics comparable to those of the T6 / T7 heat treated product can be obtained, and the solution treatment step is not necessary.
  • FIG. 1 a step of forming an aluminum alloy casting using a mold (S1 to S4), and a step of cooling the casting taken out from the die with a cooling fluid (S5).
  • a step (S4A) of holding the casting in the mold in a temperature range in which the casting temperature is equal to or lower than the solidification completion temperature and equal to or higher than the solutionable temperature is provided. Yes.
  • the temperature range of process S4A holding a casting within a metal mold is 450 degreeC or more. It is said.
  • the solution treatment for a short time is performed in the mold.
  • a mold temperature control function and another heat treatment furnace are conventionally required, but it is possible to omit these functions and equipment.
  • a solid solution state that contributes to the subsequent artificial age hardening treatment is created, and the strength is improved by the T5 heat treatment. be able to.
  • Example 1 In Example 1, as in the embodiment shown in FIG. 2, after casting, cooling with air (air quenching) was performed, and then an artificial age hardening treatment was performed. In Example 2, as in the embodiment shown in FIG. 6, after casting, the casting is held in the mold (solution treatment for a short time) and then cooled with air (air quenching), and then artificial. Age-hardened. In the conventional example, the product is allowed to cool after casting and subjected to artificial age hardening. Each condition is shown in Table 1 below.
  • FIG. 7 shows the tensile strengths of Examples 1 and 2 and the conventional example. As is clear from the figure, it was confirmed that both Examples 1 and 2 had a higher tensile strength than the conventional example, and the material characteristics were remarkably improved.
  • the manufacturing method of the aluminum alloy casting of the present invention is not limited to the above embodiments, and the details of the configuration can be changed as appropriate without departing from the gist of the present invention. is there.
  • the aluminum alloy castings include various castings including automotive parts such as cylinder blocks and aluminum wheels.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

La présente invention concerne un procédé comprenant des étapes (S1 à S4) de formation d'un moulage en alliage d'aluminium, une étape (S6) de soumission du moulage qui a été retiré d'un moule à un refroidissement par un fluide de refroidissement et une étape (S10) de soumission du moulage refroidi à un durcissement par vieillissement artificiel, l'étape (S6) étant réalisée de manière telle que : la température (a) du moulage lors de l'initiation du refroidissement n'est pas inférieure à la température d'achèvement de la solidification moins 80 ºC ; la vitesse de refroidissement (b) est de 30 ºC/min ou plus ; et la température (c) du moulage lors de l'achèvement du refroidissement n'est pas supérieure à la température de traitement (d) du durcissement par vieillissement artificiel consécutif. Le procédé peut se passer d'une étape de traitement par une solution et, ainsi, permet de réaliser une réduction de coût d'équipement ou de consommation d'énergie, et peut donner, même par un traitement thermique T5, un moulage qui montre une déformation permanente réduite et qui peut se substituer à un moulage qui a été produit par un traitement thermique T6 ou T7.
PCT/JP2013/071218 2012-09-06 2013-08-06 Procédé de production d'un moulage en alliage d'aluminium WO2014038333A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014534253A JP5907272B2 (ja) 2012-09-06 2013-08-06 アルミニウム合金製鋳物の製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012196573 2012-09-06
JP2012-196573 2012-09-06

Publications (1)

Publication Number Publication Date
WO2014038333A1 true WO2014038333A1 (fr) 2014-03-13

Family

ID=50236949

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/071218 WO2014038333A1 (fr) 2012-09-06 2013-08-06 Procédé de production d'un moulage en alliage d'aluminium

Country Status (2)

Country Link
JP (1) JP5907272B2 (fr)
WO (1) WO2014038333A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115301931A (zh) * 2022-09-01 2022-11-08 赛科利（南京）汽车模具技术应用有限公司 一种汽车零部件加工用冷却装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61113734A (ja) * 1984-11-08 1986-05-31 Mitsubishi Heavy Ind Ltd 銅合金鋳物の製造法
JPS63143247A (ja) * 1986-12-06 1988-06-15 Ngk Insulators Ltd 鋳造方法
JPH09228010A (ja) * 1995-05-19 1997-09-02 Tenedora Nemak Sa De Cv 熱処理可能なアルミニウム合金鋳物の簡易製造方法及び装置
JP2005169498A (ja) * 2003-11-19 2005-06-30 Mazda Motor Corp 軽合金製鋳物の製造方法
JP2012051000A (ja) * 2010-08-31 2012-03-15 Toyota Motor Corp 軽合金の鋳造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5136176B2 (ja) * 2008-04-14 2013-02-06 トヨタ自動車株式会社 アルミニウム合金成形品の製造方法およびその金型

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61113734A (ja) * 1984-11-08 1986-05-31 Mitsubishi Heavy Ind Ltd 銅合金鋳物の製造法
JPS63143247A (ja) * 1986-12-06 1988-06-15 Ngk Insulators Ltd 鋳造方法
JPH09228010A (ja) * 1995-05-19 1997-09-02 Tenedora Nemak Sa De Cv 熱処理可能なアルミニウム合金鋳物の簡易製造方法及び装置
JP2005169498A (ja) * 2003-11-19 2005-06-30 Mazda Motor Corp 軽合金製鋳物の製造方法
JP2012051000A (ja) * 2010-08-31 2012-03-15 Toyota Motor Corp 軽合金の鋳造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115301931A (zh) * 2022-09-01 2022-11-08 赛科利（南京）汽车模具技术应用有限公司 一种汽车零部件加工用冷却装置

Also Published As

Publication number Publication date
JP5907272B2 (ja) 2016-04-27
JPWO2014038333A1 (ja) 2016-08-08

Similar Documents

Publication Publication Date Title
CN106191572B (zh) 一种汽车配件用铝合金和汽车配件的压铸方法
JP6492057B2 (ja) 高い強度を有する銅―ニッケル―錫合金
CN104439219B (zh) 一种基于铸辗复合成形的钢环坯的铸造工艺
CN105908110B (zh) 一种降低高强铝合金复杂模锻件残余应力的方法
JP2008514807A5 (fr)
JP2008525629A5 (fr)
KR20170002473A (ko) 개선된 7xx 알루미늄 주조 합금, 및 이의 제조 방법
CN107574340A (zh) 高强度高抗蠕变铸造铝合金及hpdc发动机机体
CN102814486A (zh) 一种沙滩车发动机汽缸盖制造方法
CN102703652B (zh) 一种铝压铸模用热作模具钢的热处理工艺
WO2014038333A1 (fr) Procédé de production d'un moulage en alliage d'aluminium
KR20060021965A (ko) 자동차용 알루미늄 로워암 제조 방법
KR20200055922A (ko) 알루미늄합금소재 자동차 섀시부품의 제조방법
JP5148837B2 (ja) 球状黒鉛鋳鉄品の製造方法
JP2004322206A (ja) 半溶融成形用マグネシウム合金ビレットの製造方法
CN105671376B (zh) 高强高塑重力铸造与室温冷轧亚共晶铝硅合金材料及其制造方法
US11047032B2 (en) Method for solution heat treating with pressure
JP2018507324A (ja) 低ケイ素アルミニウム合金で作られた部品を得る方法
JP2010202956A (ja) アルミニウム合金鋳造物の熱処理方法及びアルミニウム合金鋳造物
JP7054621B2 (ja) 圧力を使用した溶体化処理のための方法
JP2004114159A (ja) 耐圧・高強度アルミニウム鋳物・シリンダヘッド
CN108018471A (zh) 一种生产铝型材的铝合金材料及其制备工艺
Ayabe et al. Effect of high thermal conductivity die steel in aluminum casting
JPS633020B2 (fr)
KR20170132771A (ko) 자동차 및 항공 분야에서 사용되는 부품의 제조를 위한 샌드 쉘 성형 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13835361

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
ENP Entry into the national phase

Ref document number: 2014534253

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13835361

Country of ref document: EP

Kind code of ref document: A1