增材制造不同微-纳粒径比B4C增强TC4复合材料组织及性能研究  

Microstructure and Properties of Laser Direct Manufacturing TC4 Alloy Reinforced by B4C with Different Micro/Nano Particle Ratios

作　　者：张文书[1] 魏晨 李兵 任勇 闵金 常辉[1] 周廉[1] ZHANG Wenshu;WEI Chen;LI Bing;REN Yong;MIN Jin;CHANG Hui;ZHOU Lian(Nanjing Tech University,Nanjing 211816,China;Baoji China Gas City Gas Development Co.,Ltd.,Baoji 721000,China;Engineering Technology Research Institute,PetroChina Coalbed Methane Co.,Ltd.,Xi'an 710068,China;China United National Engineering Research Center for Coalbed Methane Co.,Ltd.,Xi'an 710068,China;National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Field,Oil&Gas Technology Institute,Changqing Oilfield Company of Petrochina,Xi'an 710021,China;Nanjing University,Nanjing 210046,China)

机构地区：[1]南京工业大学,江苏南京211816 [2]宝鸡中燃城市燃气发展有限公司,陕西宝鸡721000 [3]中国石油煤层气有限责任公司工程技术研究院,陕西西安710068 [4]中联煤层气国家工程研究中心有限责任公司,陕西西安710068 [5]中国石油长庆油田分公司油气工艺研究院低渗透油气田勘探开发国家工程实验室,陕西西安710021 [6]南京大学,江苏南京210046

出　　处：《材料开发与应用》2024年第4期10-17,共8页Development and Application of Materials

基　　金：国家自然科学基金面上项目(5207050258)。

摘　　要：采用直接激光沉积(LDM)工艺在TC4钛合金表面成功制备含有3%(质量分数)B4C增强的B4C/TC4复合材料。分别选用粒径50μm和50 nm的B4C颗粒与TC4粉末进行机械混粉,并完成LDM成型,对比测试了微米级B4C增强颗粒与纳米级B4C增强颗粒质量分数比值分别为1%∶2%、1.5%∶1.5%、2%∶1%的3种具有不同微-纳B4C增强颗粒比例样品的显微组织和界面处显微硬度。研究结果表明,添加B4C增强相后,材料的显微组织明显细化,不同尺度B4C增强颗粒含量能够对第二相TiB与TiC的结晶度以及晶粒尺寸产生影响,纳米B4C较多时,样品中的TiC结晶度较好,TiB以纳米颗粒镶嵌在TC4晶体中。当微-纳B4C比例相近时,TC4基体硬度最高,样品内部的TiB具有较高的结晶度与较大的晶粒尺寸,同时第二相区域内的TiB与TiC的硬度也最高。The reinforced TC4 matrix composites are fabricated by adding 3%(mass friction)B4C particles by the laser direct manufacturing(LDM)technology.The B4C particles with diameters of 50μm and 50 nm are mixed with the TC4 particles,and the reinforced TC4 alloys are prepared by LDM technology,with the mass fraction ratios of the micro and nano B4C particles are 1%∶2%,1%∶1%,and 2%∶1%.The microstructures and hardness of the reinforced TC4 alloy with different ratios of micronano B4C particles are investigated.The results show that the microstructure of the TC4 alloy is significantly refined after adding B4C reinforcing phase.The content of B4C particles with different sizes can affect the crystallinity and grain size of the second phase TiB and TiC.When the content of the nano-B4C particles is higher,the TiC crystallinity is better,and the TiB phase is embedded in the TC4 crystal as nano-sized particles.When the contents of micro-and nano-B4C particles are similar,the TC4 matrix has the highest microhardness,so do the the TiB and TiC in the second phase region.Besides,the TiB phase has high crystallinity and large grain size.

关 键 词：直接激光沉积 钛基复合材料 B4C 微观组织 显微硬度 

分 类 号：TG146.23[一般工业技术—材料科学与工程]