( 1. 三峽大學(xué) 機(jī)械與材料學(xué)院， 宜昌 443002；
2. 南京航空航天大學(xué) 材料科學(xué)與技術(shù)學(xué)院， 南京 210016；
3. 華中科技大學(xué) 塑性成形模擬及模具技術(shù)國家重點(diǎn)實(shí)驗(yàn)室，
武漢 470074)
摘 要: 利用真空燒結(jié)工藝和表面氮化處理工藝制備納米復(fù)合Ti(C, N)基金屬陶瓷可轉(zhuǎn)位刀片和功能梯度可轉(zhuǎn)位刀片， 并對刀片的切削性能進(jìn)行分析。 結(jié)果表明： 切削正火態(tài)45＃鋼、 淬火態(tài)45＃鋼和奧氏體不銹鋼時(shí)， 與YT15、 YG8、 TN20相比， 制備的刀具皆表現(xiàn)出較優(yōu)的切削性能和較高的耐磨性， 表面經(jīng)氮化處理后， 刀具的表面硬度提高了HRA2.2， 大幅度提高了刀具的抗熱沖擊性能。 具有梯度結(jié)構(gòu)的金屬陶瓷刀片切削正火鋼、 鑄鐵和不銹鋼時(shí)的切削性能比無梯度結(jié)構(gòu)金屬陶瓷刀片的切削性能優(yōu)良， 具有更高的耐磨性。
關(guān)鍵字: Ti(C, N)基金屬陶瓷； 功能梯度可轉(zhuǎn)位刀片； 切削性能； 耐磨性
Ti(C, N)-based cermet tools
（ 1. College of Mechanical and Material Engineering, China Three Gorges University, Yichang 443002, China;
2. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
3. Sate Key Laboratory of Plastic Forming Simulation and Die and
Mould Technology, Huazhong University of Science and Technology,
Wuhan 430074, China）
Abstract: The nano-composite Ti(C, N)-based cermet indexable tools and functionally gradient Ti(C, N)-based cermet indexable tools were prepared by vacuum sintering process and surface heat-treatment process with hot isostatic pressing (HIP) in nitrogen, respectively, and the newly fabricated cermet cutting tools were tested by continuous turning. The results show that, comparing to the cemented carbide YT15, YG8 and cermet TN20, the newly fabricated cermet tools exhibit better performance and higher wear resistance during cutting the normalized medium carbon steel, quenched medium carbon steel and austenite stainless steel. The surface hardness of the post-treated cermets increases, and the thermal shock resistance is substantially improved. The cutting property of the cermet tools with gradient structure is much better than that without gradient structure.
Key words: nano-composite Ti(C, N)-based cermet; functionally gradient indexable insert; cutting performance; wear resistance
