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文章编号:1004-0609(2012)07-1976-08 微波烧结WC-Co硬质合金致密化与晶粒生长 娄 静1,易健宏1, 2,周承商1 (1. 中南大学 粉末冶金国家重点实验室,长沙 410083; 2. 昆明理工大学 材料科学与工程学院,昆明 650093) 摘 要:分别采用微波烧结和常规烧结制备WC-8Co硬质合金,通过1 000~1 400 ℃温度范围烧结以及1 400 ℃保温0~240 min的微波和常规烧结实验,测量各样品的收缩率,密度和晶粒尺寸,分析其致密化行为和晶粒生长,研究烧结温度和保温时间对合金致密化和晶粒生长的影响.结果表明,与常规烧结比较,微......
of TiH, as shown in Figs. 8(a-c). And CaTiO3 is generated by sintering between CaO and TiO2 [22], which is not dissolved in deionized water and hydrochloric acid. However, after reaction for 8 h, TiC......
degrades. Binderless carbides can be divided into two groups. The one consists of pure carbide, e.g., WC [1], TiC [2], TaC [3] and NbC [4]; the other consists of WC phase and a mixed transition metal carbide/carbonitride binder phase, e.g., WC-TiC [5], WC-TiC-TaC [6], WC-VC [7], WC-(Ti, W)(C, N) [8] and WC-Mo2C [6,9]. Among the binderless carbides, WC-MoxC binderless carbides have good combination......
) and (d) indicate that NiTi tube blank is composed of B2 austenite structure and a small amount of TiC phase. The spun NiTi alloy tube is shown in Fig. 3. Fig. 2 Microstructures of NiTi alloy tube blank......
and modeling [J]. Materials Science and Engineering A, 2001, 302: 92-99. [12] JIANG Q C, LI X L, WANG H Y. Fabrication of TiC Particulate reinforced magnesium matrix composite [J]. Scripta Materialia, 2003......
manufacturing. There are also many black impurities with different sizes distributing in the NiTi matrix, which are determined as TiC particles by EDX (see Fig. 5). From Figs. 4(b)-(d), it can be observed......
): s369-s373. [5] CAO Guo-jian, XU Hong-yu, ZHENG Zhen-zhu, GENG Lin, NAKA M. Grain size effect on cyclic oxidation of (TiB2+TiC)/Ni3Al composites[J]. Transaction Nonferrous Metals Society of China, 2012......
for composite plating, particularly for Ni-composite plating, such as carbides (e.g., SiC, TiC, Cr3C2, WC, B4C, ZrC, HfC), oxides (e.g., Al2O3, SiO2, TiO2, Cr2O3, ZrO2, UO2, BeO), borides and nitrides......
. Surface modifications of Al-Zn-Mg alloy using combined EDM with ultrasonic machining and addition of TiC particles into the dielectric [J]. Journal of Materials Processing Technology, 2009, 209: 4343-4350......
文章编号:1004-0609(2013)12-3335-06 铌夹层对真空轧制复合Ti-不锈钢板的显微组织及性能的影响 骆宗安1,王光磊1,谢广明1,王立朋2,赵 昆1 (1. 东北大学 轧制技术及连轧自动化国家重点实验室,沈阳 110819; 2. 首钢京唐有限公司,唐山 063200) 摘 要:利用真空轧制复合技术900 ℃时制备TA2与304L不锈钢的复合钢板,分别研究直接复合及加入Nb夹层后复合界面的组织与性能,分析Nb夹层对复合板组织及性能的影响.结果表明:直接复合的Ti-不锈钢复合板界面生成了Fe2Ti,Cr2Ti及NiTi2等多种金属间化合物,严重削弱界面......