cBN-TiN-Al合成PCBN复合片及其性能研究
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摘要
将立方氮化硼微粉和TiN、Al微粉按一定的质量比进行混料,在高温和超高压条件下合成聚晶立方氮化硼(PCBN)复合片,对复合片进行了物相分析、硬度测试以及表面显微结构分析,同时分析了切削淬火钢时cBN含量对PCBN刀具磨损的影响,研究了PCBN刀具切削时的磨损机理。烧结后PCBN复合层中的物相由除了cBN、TiN添加相以外,还出现了新相AlN和TiB_2,说明添加粘接剂与cBN发生反应,并且Al已完全反应,说明复合层中的cBN颗粒通过反应生成新物相,并被粘接剂固结。当cBN含量为80 wt%时,复合片的维氏硬度达到了4512 HV。PCBN后刀面的磨损成一个规则倒三角形,刀具的失效主要是粘结磨损和氧化磨损共同作用的结果。
The polycrystalline cubic boron nitride(PCBN) composites were sintered at high temperature under high pressure using cubic boron nitride, TiN and Al powders as raw materials. The hardness test and surface microstructure analysis, and the influence of cBN content on PCBN tool wear was analyzed of the samples. The wear mechanism of PCBN tool cutting was studied. The characterization results indicated that the new phase emerged in the PCBN was BN, TiB_2, AlN and TiN. The cBN particles in the PCBN are connected to each other by the phases formed by the reaction. When the cBN content was 80 wt%, the Vickers hardness of the composite reached 4512 HV. The wear of the tool flank of the PCBN is an inverted triangle. The wear on the PCBN tool is mainly the result of the combination of cohesive wear, and oxidative wear.
The polycrystalline cubic boron nitride(PCBN) composites were sintered at high temperature under high pressure using cubic boron nitride, TiN and Al powders as raw materials. The hardness test and surface microstructure analysis, and the influence of cBN content on PCBN tool wear was analyzed of the samples. The wear mechanism of PCBN tool cutting was studied. The characterization results indicated that the new phase emerged in the PCBN was BN, TiB_2, AlN and TiN. The cBN particles in the PCBN are connected to each other by the phases formed by the reaction. When the cBN content was 80 wt%, the Vickers hardness of the composite reached 4512 HV. The wear of the tool flank of the PCBN is an inverted triangle. The wear on the PCBN tool is mainly the result of the combination of cohesive wear, and oxidative wear.
引文
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[1 3]Adilson Jose de Oliveira,Diniz A E,Ursolino D J.Hard turning in continuous and interrupted cut with PCBN and whisker-reinforced cutting tools[J].Journal of Materials Processing Technology,2009,209(12-13):5262-5270.
[14]Gutnichenko O,Bushlya V,Zhou J,et al.Tool wear and machining dynamics when turning high chromium white cast iron with PcBN tools[J].Wear,2017:S0043164816308158.
[15]Su H,Liu P,Fu Y,et al.Tool Life and Surface Integrity in High-speed Milling of Titanium Alloy TA15 with PCD/PCBN Tools[J].Chinese Journal of Aeronautics,2012,25(5):784-790.
[2]李海波.PCBN复合片刀具切削性能对比研究[D].,大连:大连理工大学,2007.
[3]陈永杰,王海阔,彭进,等.聚晶立方氮化硼的制备方法及应用进展[J].金刚石与磨料磨具工程,2015,02:74-80.
[4]赵兴利.新型聚晶立方氮化硼(PCBN)刀具材料研制及其切削机理研究[D].济南山东大学,2011.
[5]任振火.常压下低融结合剂cBN复合材料的制备与性能表征[D].郑州:郑州大学,2010.
[6]Rong X-Z,Tsurumi T,Fukunaga O,et al.Highpressure sintering of cBN-TiN-Al composite for cutting tool application[J].Diamond and Related Materials,2002,11(2):280-286.
[7]Li Y,Kou Z,Wang H,et al.High pressure sintering behavior and mechanical properties of cBN-Ti3Al and cBN-Ti3Al-Al composite materials[J].High Pressure Research,2012,32(4):524-531.
[8]Kitiwan M,Ito A,Zhang J,et al.Densification and mechanical properties of cBN-TiN-TiB2,composites prepared by spark plasma sintering of SiO2-coated cBN powder[J].Journal of the European Ceramic Society,2014,34(15):3619-3626.
[9]赵玉成,王明智.Al与cBN在高温高压下的相互作用[J].无机材料学报,2008(02):253-256.
[10]何光春.切削速度对硬态AISIH13钢切削性能的影响研究[J].现代制造技术与装备,2018,257(04):40-42.
[1 1]张燕,夏志辉,徐东鸣.PCBN刀具高速精密切削W-Ni-Fe合金的性能研究[J].粉末冶金工业,2016(6):35-40.
[12]曹永泉,张弘,董海,等.PCBN刀具切削淬硬钢GCr15的磨损实验研究[J].中国机械工程,2006,17(21):2305-2308.
[1 3]Adilson Jose de Oliveira,Diniz A E,Ursolino D J.Hard turning in continuous and interrupted cut with PCBN and whisker-reinforced cutting tools[J].Journal of Materials Processing Technology,2009,209(12-13):5262-5270.
[14]Gutnichenko O,Bushlya V,Zhou J,et al.Tool wear and machining dynamics when turning high chromium white cast iron with PcBN tools[J].Wear,2017:S0043164816308158.
[15]Su H,Liu P,Fu Y,et al.Tool Life and Surface Integrity in High-speed Milling of Titanium Alloy TA15 with PCD/PCBN Tools[J].Chinese Journal of Aeronautics,2012,25(5):784-790.