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to replace traditional metal binders to prepare new WC cemented carbide was analyzed. Moreover, the preparation method of composite powder containing ceramic additives and the advanced sintering...了钨钴氧化物与碳源直接接触,W原子碳化不完全而形成缺碳相.等离子球磨可在一定程度上消除这种弊端,在等离子体活化效应及机械应力效应的协同作用下可于短时间内细化活化粉体,加快WC合成反应速率,简化硬质合金制备工艺[46]. 图5 原料粉末经球磨后颗粒分布示意图[45] Fig. 5 Schematic diagram of milled initial powder particle......
Journal of Refractory Metals & Hard Materials, 1997, 15(1/3): 139-149. [6] WANG X, FANG Z Z, HONG Y S. Grain growth during the early stage of sintering of nanosized WC-Co powder[J]. International...) and 3.43698×10-5 A·cm-2, respectively. Key words: WC powder; WC-15%Fe-5%Ni cemented carbide; microstructure; mechanical property Foundation item: Project (20120619) supported by the Nonferrous Research......
al. Microstructure and mechanical properties of new WC-Co base cemented carbide having highly oriented plate-like triangular prismatic WC grains[J]. Journal of the Japan Society of Powder and Powder... grains[J]. Journal of the Japan Society of Powder and Powder Metallurgy, 2002, 49(4): 299-305. [5] Cho K H, Lee J W, Chung I S. Study on the formation of anomalous large WC grain and the eta phase[J......
intensity. The dissolution behavior of WC particle in the composites can be controlled by regulating the processing parameters of elecctroslag melting and casting method and adjusting the powder starting...电冶熔铸WC/钢复合材料中WC的溶解行为 尤显卿1, 马建国2, 宋雪峰1, 任 昊1, 黄曼平2 (1. 合肥工业大学 材料科学与工程学院, 合肥 230009; 2. 安徽建筑工业学院 机电工程系, 合肥 230022) 摘 要: 用电冶熔铸工艺制备不同WC含量的WC/钢复合材料, 研究了WC颗粒在复合材料钢基体中的溶解行为和影响因素. 结果表明: 随着WC含量......
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在TC4(Ti6Al4V)基体上,采用等离子(美国7MB等离子喷涂系统)喷涂WC-12Co(粒度为10~45 μm,如图1所示)作为耐磨涂层,厚度为0.15~0.25 mm,图2所示为WC耐磨涂层示意图. 图1 WC-12Co粉末典型形貌 Fig.1 Microstructure of WC-12Co powder 图2 WC涂层示意图...,WC颗粒烧损严重,涂层中WC颗粒含量降至38%. 图4 喷涂功率对涂层性能的影响 Fig.4 Effect of spray powder on performance of coating 2.3 喷涂距离对涂层性能的影响 喷涂距离也是等离子喷涂工艺的关键参数之一,如果喷涂距离过近,喷涂粒子加速不充分,涂层性能难以控制,同时会对工件造成热损伤；喷......
DOI:10.19476/j.ysxb.1004.0609.2018.01.15 Ni3Al含量对WC基钢结硬质合金组织与性能的影响 陈 飞1,龙坚战1, 2, 3,陈 冲1,李 强3,申梦龙3,夏艳萍2,3,冉丽萍1 (1. 中南大学 粉末冶金国家重点实验室,长沙 410083； 2. 株州硬质合金集团有限公司 硬质合金国家重点实验室,株洲 412000； 3. 株洲硬质合金集团有限公司 硬质材料研发中心,株洲 412000) 摘 要:为了改善WC基钢结硬质合金性能,以热力学计算为基础,探索Ni3Al添加量对WC-Fe(Cr, Mo)钢结硬质合金组织与性能的影响.采用粉末冶金方法,以添加Ni3Al预合金粉的方式添加Al,通过液相烧结制得不同Ni3Al含量(0,0.5%,1.0%,1.4%,质量分数)的WC-50%(Fe-Ni-Al-Cr......
-rupture strength of 4260 MPa, due to the elimination of agglomerates and the reduction of lattice strain. Key words: ultrafine WC powder; micro-strain; stress-strain relation; jet milling; agglomerate... which no further comminution occurs [9]. Furthermore, WC powder particles will undergo severe plastic deformation when the powder particles are trapped between colliding balls during the ball milling......
of the conventionally used WC powder, nano W and nano C were used as the main starting materials to intensify the grain growth driving force; 2) to keep La additions staying stably in the alloys and to avoid the effect..., Lim J, Kang S. Microstructure of (W,Ti)C-Co system containing platelet WC [J]. Materials Science and Engineering A, 2010, 527(27-28): 7163-7167. [21] Beiss P, Ruthardt R, Warlimont H. Powder metallurgy......
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