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稀土元素在ZL101合金中的偏聚状态及对α相生长的影响郑志强1,熊新根1,易荣喜2,王丽1,裴志昆11. 南昌大学2. 井冈山大学摘 要:通过在铝硅合金中添加稀土元素,促进固液两相区的固相-α相的球化生长,以满足半固态成型技术对半固态坯料的要求.稀土元素在α相界面前沿的偏聚改变了α相生长的热力学条件,使α相的生长趋于均匀化,提高了α相球化效果,同时阻碍了α相的生长,细化了晶粒.在ZL101加入稀土元素后,使合金中的α相得到了球化,球化效果与稀土的加入量有关,当稀土加入量为0.50%时为最佳,稀土元素还能细化α相的晶粒.关键词:金属材料;铝硅合金;稀土;半固态;凝固;......
超声振动对半固态ZL101-La合金初生相的影响刘政1,白光珠2,3,林继兴3,4,吴强1,3,童先3,牛丽媛31. 江西理工大学机电工程学院2. 江西理工大学材料科学与工程学院3. 浙江工贸职业技术学院材料工程系4. 吉林大学材料与科学工程学院摘 要:利用超声振动技术制备了半固态ZL101-La合金浆料,研究了超声振动工艺参数,如:超声功率,超声导入温度和超声处理时间对半固态ZL101-La合金初生相的影响.结果表明:利用超声振动和稀土复合制备半固态ZL101合金浆料是可行的,超声功率是影响初生相形貌的主要因素.通过正交实验设计获得了超声振动场下制备半固态ZL101-La铝合金浆料的合适工艺方案,即:超声功率为150W,超声导入温度为650℃,超声作用时间为30s.关键词:ZL101合......
,cast iron and steel can be modified obviously with this method: the solidification structure of ZL101 alloy presented the Na and Sr modification and the mechanical properties were enhanced; a large...Study on Improving Solidification Structure of Rare Earth Al-Si Alloys with Electropulse Acting on Liquid Alloy He Peng1,Cang Daqiang1,Mo Zhiying1,LI Lingzhen1,CUI Heng1,ZONG Yanbing1 (1.School......
AlTiB纳米细化剂对ZL101合金力学及阻尼性能的影响 王浩伟1,张亦杰1,厉松春1,乐永康1,马乃恒1 (1.上海交通大学金属基复合材料国家重点实验室,上海,200030) 摘要:利用原位自生法合成的纳米晶粒细化剂,成功的克服了颗粒团聚,有效的抑制了颗粒的沉降.本试验用其对ZL101合金的细化行为进行了研究.试验结果表明:加入量为0.2%(质量分数)时,纳米晶粒细化剂可有效地细化初晶α-Al,改善共晶硅的形貌及尺寸,细化后铸态α-Al枝晶尺寸由44 μm减小至23 μm;经T6处理的细化后试样其拉伸断口为韧窝断口,且韧窝明显多于未细化试样;加入细化剂后保温30 min,与未细化合金相比,抗拉强度提高了28MPa,屈服强度提高了22 MPa,延伸率增加了2.6%;同时细化后合金的阻尼性能较未细化合金有了大幅提高,0.5 Hz时细化后室温阻尼性能Q-1=13×10-3,较之细化前......
Microstructure and Performances of Nanocrystalline Zinc-nickel Alloy Coatings LI Guang-yu1,NIU Li-yuan1,JIANG Zhong-hao1,LIAN Jian-she1 (1.The Key Lab of Automobile Materials, Ministry of Education, China, College of Materials Science and Engineering, Jilin University, Nanling Campus, Changchun, 130025, China) 摘要:Nanocrystalline zinc-nickel alloy coatings were deposited from an alkaline......
on the property of the Al alloy, its effect was also investigated. The heat-treatments used are as follows: 1) ZL101 reinforced by SiCp. Annealing: heating for 4 h at 400 ℃ and then cooling in stove... and residual stress of the Al alloy improved by SiCp, so that its microdistortion behavior is affected greatly, as shown in Fig.5. It is shown that the microdistortion behavior of ZL101+70 μm SiCp after......
Alloy 20不锈钢薄板等离子弧焊接工艺研究赵斌,王宾宾,王小华中国船舶重工集团公司第七二五研究所摘 要:对Alloy 20不锈钢薄板进行了等离子弧焊接工艺试验研究.结果表明,采用等离子弧焊接方法,ERCr Ni Mo-3焊材及合理的焊接工艺参数,等离子弧焊接工艺可用于Alloy 20不锈钢薄板的焊接,焊接接头各项性能均能满足要求.关键词:Alloy 20;不锈钢薄板;等离子弧焊接;......
)Abstract:Stainless die with micro-groove and micro-hole have been designed and manufactured, which has been used to study superplastic microforming of 2091Al-Li alloy by means of superplastic forming... micro-rib specimen, behavior of material could be understood well.Key words:superplasticity; microforming; extrusion; 2091Al-Li alloy......
Trans. Nonferrous Met. Soc. China 22(2012) s656-s660 Microforming of superplastic 5083 aluminum alloy Md. Abu Mowazzem HOSSAIN1, Sung-Tae HONG1, Kyu-Yeol PARK1, Young-Sang NA2 1. School of Mechanical...: The mechanical behavior of superplastic 5083 aluminum alloy during microforming process was investigated by finite element analysis. A micro V-groove die was modeled to analyze the effects of forming......
ZL101铝合金制汽车转向节二次热处理的性能研究黄长虹,叶锦华,付金海摘 要:文章介绍了对比初次热处理和二次热处理的一组实验,两种工艺的样品是同种零件相同的铝液化学成分,精炼效果,铸造机,模具和模穴,热处理设备和工艺条件,采用本体取样检测,主要研究了首次和二次热处理的性能和显微组织差异.结果表明,二次热处理的屈服和抗拉强度没有明显区别,但延伸率有所提高.关键词:ZL101;二次热处理;屈服强度;抗拉强度;显微组织;......
