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Cutting performance and wear mechanism of TiB 2 -B 4 C ceramic cutting tools in high speed turning of Ti6Al4V alloy
Ceramics International ( IF 5.2 ) Pub Date : 2018-09-01 , DOI: 10.1016/j.ceramint.2018.05.209 Da-Wang Tan , Wei-Ming Guo , Hong-Jian Wang , Hua-Tay Lin , Cheng-Yong Wang
Ceramics International ( IF 5.2 ) Pub Date : 2018-09-01 , DOI: 10.1016/j.ceramint.2018.05.209 Da-Wang Tan , Wei-Ming Guo , Hong-Jian Wang , Hua-Tay Lin , Cheng-Yong Wang
Abstract TiB2–20vol%B4C (TB20) and TiB2–80vol%B4C (TB80) ceramic cutting tool materials were prepared by hot pressing, and then tested in turning of Ti6Al4V alloy with various cutting parameters. The tool life and wear mechanism of TB20 and TB80 were studied and compared with a commercial grade tungsten carbide tool (WO). The results of turning showed that effective cutting length of TB20 was about one third longer than that of TB80 and WO. Among the three tools, the increment of cutting temperature measured for TB20 was the lowest as flank wear increased from 0 to 600 µm. Analysis showed that dominant wear mechanism was adhesive wear in all of the three tools tested, while chipping was also observed in TB80 and temperature deterioration in WO. In addition, the TB20 exhibited a much better integrity of cutting edge after flank wear reaching 600 µm, due to its higher toughness than TB80 and higher thermal resistance than WO, respectively. The adhesive layers of work-piece material on the rake and flank faces of both TB20 and TB80 were much thinner than that of WO, which suggested a lower adhesive wear rate in TiB2-B4C cutting tools. The high wear resistance of TiB2-B4C cutting tools is attributed to higher thermal resistance, higher hardness, and lower chemical affinity with titanium as compared with tungsten carbides, which makes them very promising materials for high speed machining of titanium alloys.
中文翻译:
Ti6Al4V合金高速车削TiB 2 -B 4 C陶瓷刀具的切削性能及磨损机理
摘要 采用热压法制备TiB2–20vol%B4C(TB20)和TiB2–80vol%B4C(TB80)陶瓷刀具材料,并在不同切削参数下对Ti6Al4V合金进行车削试验。研究了 TB20 和 TB80 的刀具寿命和磨损机理,并与商业级碳化钨刀具 (WO) 进行了比较。车削结果表明,TB20的有效切削长度比TB80和WO长约三分之一。在三种刀具中,当后刀面磨损从 0 增加到 600 µm 时,TB20 测量的切削温度增量最低。分析表明,三种测试工具的主要磨损机制是粘着磨损,而在 TB80 中也观察到崩刃,在 WO 中也观察到温度恶化。此外,在后刀面磨损达到 600 µm 后,TB20 表现出更好的切削刃完整性,由于其比 TB80 更高的韧性和比 WO 更高的耐热性,分别。TB20 和 TB80 的前刀面和后刀面工件材料的粘合层比 WO 薄得多,这表明 TiB2-B4C 刀具的粘合磨损率较低。TiB2-B4C 刀具的高耐磨性归因于与碳化钨相比具有更高的耐热性、更高的硬度和更低的与钛的化学亲和力,这使其成为非常有前途的钛合金高速加工材料。
更新日期:2018-09-01
中文翻译:
Ti6Al4V合金高速车削TiB 2 -B 4 C陶瓷刀具的切削性能及磨损机理
摘要 采用热压法制备TiB2–20vol%B4C(TB20)和TiB2–80vol%B4C(TB80)陶瓷刀具材料,并在不同切削参数下对Ti6Al4V合金进行车削试验。研究了 TB20 和 TB80 的刀具寿命和磨损机理,并与商业级碳化钨刀具 (WO) 进行了比较。车削结果表明,TB20的有效切削长度比TB80和WO长约三分之一。在三种刀具中,当后刀面磨损从 0 增加到 600 µm 时,TB20 测量的切削温度增量最低。分析表明,三种测试工具的主要磨损机制是粘着磨损,而在 TB80 中也观察到崩刃,在 WO 中也观察到温度恶化。此外,在后刀面磨损达到 600 µm 后,TB20 表现出更好的切削刃完整性,由于其比 TB80 更高的韧性和比 WO 更高的耐热性,分别。TB20 和 TB80 的前刀面和后刀面工件材料的粘合层比 WO 薄得多,这表明 TiB2-B4C 刀具的粘合磨损率较低。TiB2-B4C 刀具的高耐磨性归因于与碳化钨相比具有更高的耐热性、更高的硬度和更低的与钛的化学亲和力,这使其成为非常有前途的钛合金高速加工材料。