ZTC4钛合金大型复杂铸件组织及性能均匀性
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摘要
目的以工程应用的大型复杂结构ZTC4钛合金铸件为研究对象,研究铸件复杂结构特征对组织、化学成分、力学性能分布均匀性的影响规律。方法用金相显微镜和扫描电镜对组织形貌进行观察。结果 Ti,Al元素在铸件各位置的分布比较均匀,V元素不均匀性较高。随铸件壁厚尺寸的增大,β晶粒尺寸和α片层间距成近线性增加的趋势,且β晶粒尺寸增幅较α片层间距大。结论铸件壁厚尺寸增加,宏观硬度和显微硬度呈近线性下降的趋势。
The paper aims to study the influence rules of complex structure characteristics on homogeneities of microstructure, chemical compositions and mechanical properties by taking large complex in ZTC4 titanium casting of large complex structure in engineering applications as a target. Elements Ti and Al were distributed uniformly in each position of the casting. Element V had high inhomogeneity. The β grain size and α lamellar spacing increased linearly with the increase of wall thickness of castings. The increase of β grain size was larger than that of α lamellar spacing. Macro-hardness and micro-hardness decrease with the increase of wall thickness.
The paper aims to study the influence rules of complex structure characteristics on homogeneities of microstructure, chemical compositions and mechanical properties by taking large complex in ZTC4 titanium casting of large complex structure in engineering applications as a target. Elements Ti and Al were distributed uniformly in each position of the casting. Element V had high inhomogeneity. The β grain size and α lamellar spacing increased linearly with the increase of wall thickness of castings. The increase of β grain size was larger than that of α lamellar spacing. Macro-hardness and micro-hardness decrease with the increase of wall thickness.
引文
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[13]孙曙宇,吕维洁.TC18钛合金在热变形过程中的组织不均匀现象[J].稀有金属材料与工程,2016(6):1545—1548.SUN Shu-yu,LYU Wei-jie.Microstructure Heterogeneity of TC18 Ti Alloy during Hot Deformation[J].Rare Metal Materials and Engineering,2016(6):1545—1548.
[14]赵嘉琪,杨伟光,南海,等.热等静压工艺参数对ZTC4钛合金力学性能的影响[J].材料工程,2011(10):42—46.ZHAO Jia-qi,YANG Wei-guang,NAN Hai,et al.Effects of Hot Isostatic Pressing Treatment Parameters on Mechanical Properties of ZTC4 Casting Titanium Alloy[J].Material Engineering,2011(10):42—46.
[15]徐洲.金属固态相变原理[M].科学出版社,2004.XU Zhou.Metal Solid Phase Transformation Principle[M].Science Press,2004.
[16]蒋玉平,杨锦,袁本福,等.锻造和热处理对TC2钛合金硬度的影响[J].热加工工艺,2011,40(14):166—169.JIANG Yu-ping,YANG Jin,YUAN Ben-fu,et al.Influences of Forging and Heat Treatment on Hardness of TC2Alloy[J].Material&Heat Treatment,2011,40(14):166—169.
[17]Standard Hardness Conversion Tables for Metals Relationship among Brinell Hardness,Vickers Hardness,Rockwell Hardness,Superficial Hardness,Knoop Hardness,and Scleroscope Hardness[J].2007.
[2]李壮,康少酺,于欢欢,等.TC4钛合金冷却过程中组织变化分析[J].沈阳航空航天大学学报,2014(5):44—49.LI Zhuang,KANG Shao-pu,YU Huan-huan,et al.The Microstructural Evolution of TC4 Alloy during Cooling from the Solution Temperature[J].Journal of Shenyang Aerospace University,2014(5):44—49.
[3]赵永庆,葛鹏.我国自主研发钛合金现状与进展[J].航空材料学报,2014(4):51—61.ZHAO Yong-qing,GE Peng.Current Situation and Development of New Titanium Alloys Invented in China[J].Journal of Aeronautical Materials,2014(4):51—61.
[4]修清磊.砂型铸造钛合金薄壁铸件凝固与变形数值模拟研究[D].哈尔滨:哈尔滨工业大学,2012.XIU Qing-lei.Study on Numerical Simulation of Solidification and Deformation of Titanium Alloy Thin-walled Castings during Sand Casting[D].Harbin:Harbin Institute of Technology,2012.
[5]南海,谢成木,魏华胜,等.大型复杂薄壁类钛合金精铸件的研制[J].中国铸造装备与技术,2001(2):12—14.NAN Hai,XIE Cheng-mu,WEI Hua-sheng,et al.The Study of Large Thin-wall Complex Integrated Titanium Precision Casting[J].China Foundry Equipment&Technology,2001(2):12—14.
[6]贾丽敏.钛合金离心精密铸造凝固组织与力学性能分析[D].哈尔滨:哈尔滨工业大学,2006.JIA Li-min.Experimental Analyses on Solidified Structures and Mechanical Properties of Centrifugal Precision Titanium Castings[D].Harbin:Harbin Institute of Technology,2006.
[7]王志刚.钛合金立式离心精密铸造凝固组织数值模拟[D].哈尔滨:哈尔滨工业大学,2007.WANG Zhi-gang.Numerical Simulation of Solidification Structure of Ti Alloy During Vertical Centrifugal Casting[D].Harbin:Harbin Institute of Technology,2007.
[8]凌云,王红红,周建新,等.钛合金离心铸造数值模拟技术及应用[J].铸造设备与工艺,2015(1):31—34.LING Yun,WANG Hong-hong,ZHOU Jian-xin,et al.Simulation Technology and Application on the Process of Complex Titanium by Casting[J].Foundry Equipment and Technology,2015(1):31—34.
[9]石德珂.材料科学基础[M].北京:机械工业出版社,2003.SHI De-ke.Materials Science Foundation[M].Beijing:Mechanical Industry Press,2003.
[10]陈战乾,高颀,刘新,等.Ti-1023合金铸锭铁偏析控制[J].金属学报,2002,38(Z1):320—321.CHEN Zhan-qian,GAO Qi,LIU Xin,et al.Control of Iron Segregation in Ti-1023 Titanium Alloy[J].Acta Metallurgica Sinica,2002,38(Z1):320—321.
[11]柳玉起,吴树森.材料成形原理[M].北京:机械工业出版社,2008.LIU Yu-qi,WU Shu-sen.Material Foring Theory[M].Beijing:Mechanical Industry Press,2008.
[12]谢成木.钛及钛合金铸造[M].北京:机械工业出版社,2005.XIE Cheng-mu.Titanium and Titanium Alloy Casting[M].Beijing:Mechanical Industry Press,2005.
[13]孙曙宇,吕维洁.TC18钛合金在热变形过程中的组织不均匀现象[J].稀有金属材料与工程,2016(6):1545—1548.SUN Shu-yu,LYU Wei-jie.Microstructure Heterogeneity of TC18 Ti Alloy during Hot Deformation[J].Rare Metal Materials and Engineering,2016(6):1545—1548.
[14]赵嘉琪,杨伟光,南海,等.热等静压工艺参数对ZTC4钛合金力学性能的影响[J].材料工程,2011(10):42—46.ZHAO Jia-qi,YANG Wei-guang,NAN Hai,et al.Effects of Hot Isostatic Pressing Treatment Parameters on Mechanical Properties of ZTC4 Casting Titanium Alloy[J].Material Engineering,2011(10):42—46.
[15]徐洲.金属固态相变原理[M].科学出版社,2004.XU Zhou.Metal Solid Phase Transformation Principle[M].Science Press,2004.
[16]蒋玉平,杨锦,袁本福,等.锻造和热处理对TC2钛合金硬度的影响[J].热加工工艺,2011,40(14):166—169.JIANG Yu-ping,YANG Jin,YUAN Ben-fu,et al.Influences of Forging and Heat Treatment on Hardness of TC2Alloy[J].Material&Heat Treatment,2011,40(14):166—169.
[17]Standard Hardness Conversion Tables for Metals Relationship among Brinell Hardness,Vickers Hardness,Rockwell Hardness,Superficial Hardness,Knoop Hardness,and Scleroscope Hardness[J].2007.