固溶时间对ADC12铝合金挤压铸造组织及力学性能的影响
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摘要
研究了固溶时间对挤压铸造ADC12铝合金显微组织及力学性能的影响。结果表明:随着固溶时间的延长,显微组织中粗大片状共晶Si和针状Al_5FeSi相均细化为细小颗粒状,长宽比(L/B)值由8.9降到2.0;合金的抗拉强度由挤压铸态的227 MPa增加到固溶时间为10 h的274 MPa;维氏硬度呈现先增加后降低的趋势,在固溶时间为4 h时达到最大值110HV,之后趋于稳定。ADC12铝合金断裂形式由准解理断裂向韧性断裂转变。
The microstructure and mechanical properties of ADC12 aluminum alloy with different solution time were studied. The results show that, with the increase of solution time, the coarse lamellar eutectic Si and the needle like Al_5 Fe Si phase in the squeeze casting microstructure are fine granular, and the ratio of length to width(L/B value)decreases from 8.9 to 2. The tensile strength of the material increases from 227 MPa of the squeeze casting to 274 MPa after 10 h solution treatment; Vickers hardness exhibits reducing after the first increase trend in the solution time to reach maximum 110 HV at 4 h, and then trends to stable. The fracture form of ADC12 casting aluminum alloy transforms from quasi cleavage fracture to ductile fracture after solution treatment.
The microstructure and mechanical properties of ADC12 aluminum alloy with different solution time were studied. The results show that, with the increase of solution time, the coarse lamellar eutectic Si and the needle like Al_5 Fe Si phase in the squeeze casting microstructure are fine granular, and the ratio of length to width(L/B value)decreases from 8.9 to 2. The tensile strength of the material increases from 227 MPa of the squeeze casting to 274 MPa after 10 h solution treatment; Vickers hardness exhibits reducing after the first increase trend in the solution time to reach maximum 110 HV at 4 h, and then trends to stable. The fracture form of ADC12 casting aluminum alloy transforms from quasi cleavage fracture to ductile fracture after solution treatment.
引文
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[14]李润霞,于洪江,袁晓光,李荣德.热处理对过共晶Al-Si合金组织与性能的影响[J].热加工工艺,2009,38(14):121-123.LI Run-xia,YU Hong-jiang,YUAN Xiao-guang,LI Rong-de.Effect of heat treatment on microstructure and properties of hyper-eutectic Al-Si-based alloy[J].Hot Working Technology,2009,38(14):121-123.
[15]林高用,雷玉霞,郭道强,许秀芝,张宗鹏.变形Al-Si-Cu-Mg合金热处理强化及其组织特征[J].中国有色金属学报,2014,24(3):584-592.LIN Gao-yong,LEI Yu-xia,GUO Dao-qiang,XU Xiu-zhi,ZHANG Zong-peng.Heat treatment strengthening and microstructure characteristics of wrought Al-Si-Cu-Mg alloy[J].Transactions of Nonferrous Metals Society of China,2014,24(3):584-592.
[2]齐丕骧.国内外挤压铸造技术发展概况[J].特种铸造及有色合金,2002(2):20-23.QI Pi-xiang.Squeeze casting technology at home and abroad[J].Special Casting&Nonferrous Alloys,2002(2):20-23.
[3]张卫文,赵海东,张大童,游东东,邵明,李元元.金属材料挤压铸造成形技术的研究进展[J].中国材料进展,2011,30(7):25-30.ZHANG Wei-wen,ZHAO Hai-dong,ZHANG Da-tong,YOUDong-dong,SHAO Ming,LI Yuan-yuan.Progress in technology of squeeze casting for metal materials[J].Material China,2011,30(7):25-30.
[4]林波,张卫文,程佩,汪先送,李元元.挤压铸造Al-5.0Cu-0.6Mn-0.5Fe合金的显微组织和力学性能[J].中国有色金属学报,2013,23(5):1195-1201.LIN Bo,ZHANG Wei-wen,CHENG Pei,WANG Xian-song,LIYuan-yuan.Microstructure and mechanical properties of Al-5.0Cu-0.6Mn-0.5Fe alloy prepared by squeeze casting[J].The Chinese Journal of Nonferrous Metals,2013,23(5):1195-1201.
[5]EIDHED W.Effects of solution treatment time and Sr-modification on microstructure and mechanical property of Al-Si piston alloy[J].Journal of Material Science&Technology,2008,24(1):29-32.
[6]ZHANG Ming,ZHANG Wei-wen,ZHAO Hai-dong,ZHANGDa-tong,LI Yuan-yuan.Effect of pressure on microstructures and mechanical properties of Al-Cu-based alloy prepared by squeeze casting[J].Transactions of Nonferrous Metals Society of China,2007,17(3):496-501.
[7]BOOTH C,ATTWOOD D.Solution treatment effects on microstructure and mechanical properties of Al-(1 to13 pct)Si-Mg cast alloys[J].Macromolecular Rapid Communications,2011,42(1):171-180.
[8]MOUSTAFA M A,SAMUEL F H,DOTY H W.Effect of solution heat treatment and additives on the microstructure of Al-Si(A413.1)automotive alloys[J].Journal of Materials Science,2003,38(22):4507-4522.
[9]LI Rong-de,LI Run-xia,YU Li,HU Zhuang-qi.Effect of Cd and Sn addition on the microstructure and mechanical properties of Al-Si-Cu-Mg cast alloy[J].Transactions of Materials&Heat Treatment,2004,25(5):113-116.
[10]李飞龙,黄晓珍,苏广才,李飞庆,刘俊生,汤胜博,江鸿杰,谢尚昇.固溶处理工艺对改良铸造铝硅合金组织和性能的影响[J].铝加工,2015(1):24-29.LI Fei-long,HUANG Xiao-zhen,SU Guang-cai,LI Fei-qing,LIU Jun-sheng,TANG Sheng-bo,JIANG Hong-jie,XIEShang-sheng.Effect of solution treatment process on the microstructure and property of modified aluminum silicon casting alloy[J].Aluminium Fabrication,2015(1):24-29.
[11]何亮,黄天佑,康进武.余热热处理对Al-Si-Cu合金铸件组织和性能的影响[J].材料热处理学报,2007,28(4):69-73.HE Liang,HUANG Tian-you,KANG Jin-wu.Effect of heat treatment on microstructure and tensile properties of 319aluminum alloy[J].Transactions of Materials&Heat Treatment,2007,28(4):69-73.
[12]DANG B,LI Y B,LIU F,ZUO Q,LIU M C.Effect of T4 heat treatment on microstructure and hardness of A356 alloy refined by Ga+In+Sn mixed alloy[J].Materials&Design,2014,57(5):73-78.
[13]洪涛,龚园平,田妮,赵刚,于福晓,左良.固溶温度对新型Al-12.7Si-0.7Mg合金挤压材组织性能的影响[J].稀有金属,2012,36(3):368-372.HONG Tao,GONG Yuan-ping,TIAN Ni,ZHAO Gang,YUFu-xiao,ZUO Liang.Effect of solution temperature on microstructure and properties of Al-12.7Si-0.7Mg aluminum alloy extrusion[J].Chinese Journal of Rare Metals,2012,36(3):368-372.
[14]李润霞,于洪江,袁晓光,李荣德.热处理对过共晶Al-Si合金组织与性能的影响[J].热加工工艺,2009,38(14):121-123.LI Run-xia,YU Hong-jiang,YUAN Xiao-guang,LI Rong-de.Effect of heat treatment on microstructure and properties of hyper-eutectic Al-Si-based alloy[J].Hot Working Technology,2009,38(14):121-123.
[15]林高用,雷玉霞,郭道强,许秀芝,张宗鹏.变形Al-Si-Cu-Mg合金热处理强化及其组织特征[J].中国有色金属学报,2014,24(3):584-592.LIN Gao-yong,LEI Yu-xia,GUO Dao-qiang,XU Xiu-zhi,ZHANG Zong-peng.Heat treatment strengthening and microstructure characteristics of wrought Al-Si-Cu-Mg alloy[J].Transactions of Nonferrous Metals Society of China,2014,24(3):584-592.