CN102321859A - 一种az91d铸造镁合金晶粒细化的方法 - Google Patents

一种az91d铸造镁合金晶粒细化的方法 Download PDF

Info

Publication number
CN102321859A
CN102321859A CN201110253615A CN201110253615A CN102321859A CN 102321859 A CN102321859 A CN 102321859A CN 201110253615 A CN201110253615 A CN 201110253615A CN 201110253615 A CN201110253615 A CN 201110253615A CN 102321859 A CN102321859 A CN 102321859A
Authority
CN
China
Prior art keywords
cast magnesium
az91d
magnesium alloys
pressure
az91d cast
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
CN201110253615A
Other languages
English (en)
Inventor
张瑞军
刘秋香
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yanshan University
Original Assignee
Yanshan University
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 Yanshan University filed Critical Yanshan University
Priority to CN201110253615A priority Critical patent/CN102321859A/zh
Publication of CN102321859A publication Critical patent/CN102321859A/zh
Pending legal-status Critical Current

Links

Images

Landscapes

  • Manufacture And Refinement Of Metals (AREA)

Abstract

一种AZ91D铸造镁合金晶粒细化的方法,首先对AZ91D铸造镁合金进行常压固溶处理,温度为400℃,保温时间为24h,冷却方式为水冷。然后将上述AZ91D铸造镁合金进行高压时效处理,压力为1~3GPa,加热温度为300~400℃,保温保压时间为0.5~1h,断电卸压空冷至室温。本发明工艺简单,物任何污染,AZ91D铸造镁合金的晶粒发生细化明显,达到较为理想的晶粒细化效果。

Description

一种AZ91D铸造镁合金晶粒细化的方法
技术领域
本发明涉及一种金属处理方法,特别涉及镁合金的处理方法。
背景技术
镁合金在汽车、航空航天、电子信息等领域获得了日益广泛的应用,其原因主要是镁合金具有密度小、比强度高、电磁波屏蔽性、减震性好、铸造性能好、可以回收利用及其良好的机械加工性等优点。但是其晶格结构为密排六方结构,这就决定了它的塑性差、常温力学性能差、高温强度低,致使镁合金的应用受到极大限制。
细化晶粒是一种能同时有效提高金属合金强度和韧性的方法。因此,发展各种能有效细化合金晶粒的技术和方法一直备受关注。
为提高Mg-Al系镁合金的强度和韧性指标,迄今为止,人们已发展了多种细化合金晶粒的方法。常规的铸造镁合金晶粒细化工艺有过热处理工艺、碳变质处理法,此外塑性变形是细化镁合金晶粒的有效手段。虽然过热处理对镁合金有明显的细化效果,但是温度过高会是镁合金出现严重的氧化和吸气现象。碳变质处理法细化效果较好,但是含碳变质法中通常是往镁合金中添加C2Cl6或者CCl4等含有碳原子的化合物,而这些化合物在变质过程中会释放大量的氯气,对环境和人体产生损害。塑性变形处理法设备的要求较高,且设备投资较大。
发明内容
本发明的目的是提供一种工艺简单、无污染、能有效细化镁合金晶粒的AZ91D铸造镁合金晶粒细化的方法。本发明主要是通过常压固溶处理结合高压时效处理工艺来实现的。
本发明的技术方案如下:
(1) 常压固溶处理:首先对AZ91D铸造镁合金进行常压固溶处理,其目的是使合金中起到强化作用的元素,如铝、锌等最大限度的溶入α-Mg基体,从而得到过饱和固溶体,为时效处理创造必要的条件。固溶处理温度为400℃,保温时间为24h,冷却方式为水冷。
(2) 高压时效处理:对上述常压固溶处理后的AZ91D铸造镁合金在压力作用下进行时效处理,其主要目的是使常压固溶处理后的AZ91D镁合金在压力及温度的共同作用下发生动态回复再结晶而获得细化的组织。将上述AZ91D铸造镁合金置于CS-IIB型六面顶压机中,作用于合金上的压力升高至1~3GPa,温度加热至300~400℃,之后保温保压0.5~1h,最后断电卸压空冷至室温。
本发明与现有技术相比具有如下优点:工艺方法简单,无任何污染,AZ91D铸造镁合金的组织晶粒细化明显,仅为其铸态镁合金晶粒尺寸的l/15~1/10。
附图说明
图1为AZ91D铸造镁合金的金相组织电镜图。
图2为采用常压固溶和常压时效处理后的AZ91D铸造镁合金的金相组织电镜图。
图3为本发明实施例1获得的AZ91D铸造镁合金的金相组织电镜图。
图4为本发明实施例2获得的AZ91D铸造镁合金的金相组织电镜图。
图5为本发明实施例3获得的AZ91D铸造镁合金的金相组织电镜图。
具体实施方式:
实施例1
所用AZ91D铸造镁合金的化学成分(质量分数,%)为:8.6 Al,0.7Zn,0.2Mn,0.05 Si,0.025 Cu,0.001 Ni,0.004 Fe,0.0007 Be,0.01杂质,余量为Mg。对上述镁合金进行常压固溶处理,温度为400℃,保温时间为24h,水冷至室温。然后,将上述镁合金切割成Ф8 mm×13.5mm的圆柱体试样,并将其置于CS-IIB型六面顶压机中进行高压时效处理,压力为1GPa,加热温度为300℃,保温保压1h,断电卸压空冷至室温(约25℃)。
为与实施例1比较,对常压固溶处理后AZ91D铸造镁合金实施了常压时效处理,加热温度为400℃,保温时间是1h,空冷至室温。
金相显微组织观察表明:采用本实施方案处理后的AZ91D铸造镁合金试样中α-Mg基体的晶粒细化效果显著,平均晶粒约为34μm,而经常压固溶+常压时效处理工艺处理后的AZ91D铸造镁合金试样中α-Mg基体的平均晶粒约为174μm。
实施例2
所用AZ91D铸造镁合金的化学成分(质量分数,%)为:8.6 Al,0.7Zn,0.2Mn,0.05 Si,0.025 Cu,0.001 Ni,0.004 Fe,0.0007 Be,0.01杂质,余量为Mg。对上述镁合金进行常压固溶处理,温度为400℃,保温时间为24h,水冷至室温。然后,将上述镁合金切割成Ф8 mm×13.5mm的圆柱体试样,并将其置于CS-IIB型六面顶压机中进行高压时效处理,压力为2GPa,加热温度为350℃,保温保压1h,断电卸压空冷至室温(约25℃)。
金相显微组织观察表明:α-Mg基体平均晶粒约为29μm。
实施例3
所用AZ91D铸造镁合金的化学成分(质量分数,%)为:8.6 Al,0.7Zn,0.2Mn,0.05 Si,0.025 Cu,0.001 Ni,0.004 Fe,0.0007 Be,0.01杂质,余量为Mg。对上述镁合金进行常压固溶处理,温度为400℃,保温时间为24h,水冷至室温。然后,将上述镁合金切割成Ф8 mm×13.5mm的圆柱体试样,并将其置于CS-IIB型六面顶压机中进行高压时效处理,压力为3GPa,加热温度为400℃,保温保压0.5h,断电卸压空冷至室温(约25℃)。
金相显微组织观察表明:α-Mg基体的平均晶粒约为20μm。
表1:       在相同原料相同固溶条件下对AZ91D
铸造镁合金进行不同时效处理的检测结果
                                                 
Figure 658271DEST_PATH_IMAGE001

Claims (1)

1.一种AZ91D铸造镁合金晶粒细化的方法,其特征在于:
(1)常压固溶处理:对AZ91D铸造镁合金进行常压固溶处理,温度为400℃,保温时间为24h,水冷至室温;
(2)高压时效处理:对上述镁合金进行高压时效处理,压力为1~3GPa,加热温度为300~400℃,保温保压时间为0.5~1h,断电卸压空冷至室温。
CN201110253615A 2011-08-31 2011-08-31 一种az91d铸造镁合金晶粒细化的方法 Pending CN102321859A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110253615A CN102321859A (zh) 2011-08-31 2011-08-31 一种az91d铸造镁合金晶粒细化的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110253615A CN102321859A (zh) 2011-08-31 2011-08-31 一种az91d铸造镁合金晶粒细化的方法

Publications (1)

Publication Number Publication Date
CN102321859A true CN102321859A (zh) 2012-01-18

Family

ID=45449687

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201110253615A Pending CN102321859A (zh) 2011-08-31 2011-08-31 一种az91d铸造镁合金晶粒细化的方法

Country Status (1)

Country Link
CN (1) CN102321859A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109158541A (zh) * 2018-09-10 2019-01-08 闻喜县远华冶金材料有限公司 镁合金工艺雕像的生产方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100408709C (zh) * 2004-05-19 2008-08-06 中国科学院金属研究所 一种高强高韧镁合金及其制备方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100408709C (zh) * 2004-05-19 2008-08-06 中国科学院金属研究所 一种高强高韧镁合金及其制备方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王建青: "高压处理对AZ91D镁合金组织及性能的影响", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》, no. 7, 15 July 2010 (2010-07-15) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109158541A (zh) * 2018-09-10 2019-01-08 闻喜县远华冶金材料有限公司 镁合金工艺雕像的生产方法

Similar Documents

Publication Publication Date Title
Qi et al. Effect of Sn addition on the microstructure and mechanical properties of Mg–6Zn–1Mn (wt.%) alloy
CN103131904B (zh) 一种铝合金材料及其热处理工艺
Zhen et al. Effect of heat treatment on the microstructures and mechanical properties of the extruded Mg–11Gd–1Zn alloy
Han et al. Effect of precipitates on microstructures and properties of forged Mg–10Gd–2Y–0.5 Zn–0.3 Zr alloy during ageing process
WO2009147861A1 (ja) 易成形性マグネシウム合金板材及びその作製方法
Han et al. Study on microstructure and mechanical properties of Al–Mg–Si–Cu alloy with high manganese content
CN104046934B (zh) 制备超细晶镁锌锰合金的方法
CN104694800A (zh) 一种高强、轻质Al-Mg-Zn合金
CN103409660A (zh) 一种超细晶粒的新型β/γ-TiAl合金
Meng et al. Effect of Zr on microstructures and mechanical properties of an AlMgSiCuCr alloy prepared by low frequency electromagnetic casting
Yang et al. Microstructure evolution of Mg–6Gd–2Y alloy during solid solution and aging process
Chiang et al. Rolling route for refining grains of super light Mg-Li alloys containing Sc and Be
Liu et al. Precipitates formed in a Mg–7Y–4Gd–0.5 Zn–0.4 Zr alloy during isothermal ageing at 250° C
CN111254333B (zh) 一种多元高强耐蚀变形镁合金及其制备方法
CN103290285B (zh) 一种镁-锌-锰-锡-钇合金及其制备方法
CN102031433A (zh) 高含锌量的镁-锌-锰-铈系镁合金材料
Wu et al. A novel method for improving the strength and ductility of Mg–Y–Er–Zn alloy using rotary-die equal-channel angular pressing
Liu et al. Microstructure and mechanical properties of a Mg 94 Y 4 Ni 2 alloy with long period stacking ordered structure
CN109112450A (zh) 一种耐热铸造镁合金材料热处理方法
CN102242299A (zh) 一种Bi和Nd复合强化的高强铸造镁合金及其制备方法
Leng et al. Microstructure and mechanical properties of Mg–(6, 9) RY–4Zn alloys by extrusion and aging
CN111187955A (zh) 一种稀土钇掺杂的镁锂合金及其制备方法
CN103469039B (zh) 一种含钙和稀土钐的镁-铝-锌变形镁合金
Ji et al. Microstructural characteristics and paint-bake response of Al-Mg-Si-Cu alloy
Tian et al. Effect of step quenching and Zr addition on the microstructure and mechanical properties of Al-Mg-Si alloy

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120118