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    • 3. 发明申请
    • Method of making a cemented carbide body
    • 制造硬质合金体的方法
    • US20080224344A1
    • 2008-09-18
    • US12073934
    • 2008-03-12
    • Kenneth WestergrenMarian MikusLeif Akesson
    • Kenneth WestergrenMarian MikusLeif Akesson
    • B29C67/04B29C35/02
    • C23C30/005B22F3/1035B22F2998/00C22C29/02C22C29/08
    • The present invention relates to a method of making a cemented carbide body.The body is made using conventional powder metallurgical methods such as milling, pressing and sintering. According to the invention, a combined sintering process is used comprising at least a sequence where the batch of bodies in the sintering furnace is heated to a sintering temperature at least above the melting point of the binder phase. The batch of bodies in the sintering furnace is then allowed to cool down to a temperature at least below the melting point of the binder phase and kept there for at least from about 1 but preferably less than about 30 minutes and then heated up again to a sintering temperature at least above the binder phase melting point.The present invention also relates to a cemented carbide body made according to the method.
    • 本发明涉及一种制造硬质合金体的方法。 机身采用传统的粉末冶金方法,如铣削,压制和烧结。 根据本发明,使用组合烧结方法,其至少包括将烧结炉中的一批物体加热至至少高于粘结相的熔点的烧结温度的顺序。 然后将烧结炉中的一批物体冷却至至少低于粘结相熔点的温度,并保持至少约1℃,优选小于约30分钟,然后再次加热至 烧结温度至少高于粘结相熔点。 本发明还涉及根据该方法制造的硬质合金体。
    • 4. 发明授权
    • Cemented carbide with binder phase enriched surface zone
    • 具有粘结相富集表面区的硬质合金
    • US5649279A
    • 1997-07-15
    • US343921
    • 1994-11-17
    • Per GustafsonLeif AkessonAke Ostlund
    • Per GustafsonLeif AkessonAke Ostlund
    • C22C29/02B22F3/00C22C1/05C22C29/08
    • C22C1/051C22C29/08B22F2998/00Y10T428/12021Y10T428/12028Y10T428/12056
    • There is disclosed a new process for binder phase enrichment. The process combines binder phase enrichment by dissolution of cubic phase with the requirements that cause formation of stratified layers, resulting in a unique structure. The new structure is characterized by, in comparison with the ones previously known, deeper stratified layers and less maximum binder phase enrichment. The possibility of combining dissolution of the cubic phase with formation of stratified layers offers new possibilities to optimize the properties of tungsten carbide based cemented carbides for cutting tools.The new process offers possibilities to combine the two types of gradients. The dissolution of cubic phase moves the zone with maximum mount of stratified binder phase from the surface to a zone close to and below the dissolution front. By controlling the depth of dissolution, the interstitial balance and the cooling rate, a cemented carbide with a unique combination of toughness and plastic deformation resistance can be achieved.
    • 公开了用于粘结相富集的新方法。 该方法通过立方相的溶解与引起层状层形成的要求结合粘结相富集,产生独特的结构。 与以前已知的相比,新结构的特征在于更深的分层和更少的最大粘结相富集。 将立方相的溶解与分层的形成相结合的可能性为优化用于切削工具的碳化钨基硬质合金的性能提供了新的可能性。 新工艺提供了组合两种梯度的可能性。 立方相的溶解将最大的层状粘合剂相的安装区从表面移动到溶解前部附近和之下的区域。 通过控制溶解深度,间隙平衡和冷却速度,可以实现具有韧性和塑性变形抗力的独特组合的硬质合金。
    • 6. 发明授权
    • Cemented carbide with binder phase enriched surface zone
    • 具有粘结相富集表面区的硬质合金
    • US5451469A
    • 1995-09-19
    • US159257
    • 1993-11-30
    • Per GustafsonLeif AkessonAke Ostlund
    • Per GustafsonLeif AkessonAke Ostlund
    • C22C29/02B22F3/00C22C1/05C22C29/08B22F7/06
    • C22C1/051C22C29/08B22F2998/00Y10T428/12021Y10T428/12028Y10T428/12056
    • There is disclosed a new process for binder phase enrichment. The process combines binder phase enrichment by dissolution of cubic phase with the requirements that cause formation of stratified layers, resulting in a unique structure. The new structure is characterized by, in comparison with the ones previously known, deeper stratified layers and less maximum binder phase enrichment. The possibility of combining dissolution of the cubic phase with formation of stratified layers offers new possibilities to optimize the properties of tungsten carbide based cemented carbides for cutting tools.The new process offers possibilities to combine the two types of gradients. The dissolution of cubic phase moves the zone with maximum amount of stratified binder phase from the surface to a zone close to and below the dissolution front. By controlling the depth of dissolution, the interstitial balance and the cooling rate, a cemented carbide with a unique combination of toughness and plastic deformation resistance can be achieved.
    • 公开了用于粘结相富集的新方法。 该方法通过立方相的溶解与引起层状层形成的要求结合粘结相富集,产生独特的结构。 与以前已知的相比,新结构的特征在于更深的分层和更少的最大粘结相富集。 将立方相的溶解与分层的形成相结合的可能性为优化用于切削工具的碳化钨基硬质合金的性能提供了新的可能性。 新工艺提供了组合两种梯度的可能性。 立方相的溶解将最大量的分层粘合剂相的区域从表面移动到溶解前沿附近和之下的区域。 通过控制溶解深度,间隙平衡和冷却速度,可以实现具有韧性和塑性变形抗力的独特组合的硬质合金。
    • 8. 发明申请
    • Coated cemented carbide insert particularly useful for heavy duty operations
    • 涂层硬质合金刀片特别适用于重型作业
    • US20080166192A1
    • 2008-07-10
    • US12003372
    • 2007-12-21
    • Leif AkessonKenneth Westergren
    • Leif AkessonKenneth Westergren
    • C22C29/02B32B15/04B23P15/28B26D1/01B05D3/00
    • C22C29/08B22F2005/001B22F2998/00B22F2999/00C23C28/042C23C28/044C23C30/005Y10T407/27Y10T428/12576Y10T428/24975Y10T428/252Y10T428/265B22F2207/03B22F2303/05B22F2302/10B22F2302/15
    • The present invention relates to coated cutting tool inserts particularly useful for heavy roughing turning operations of very large steel components, such as drive shafts for ships and shafts for wind power plants. The inserts are large with an iC, inscribed circle diameter, of greater than or equal to about 19 mm and a thickness of greater than or equal to about 6 mm with a composition of from about 5 to about 10 wt-% Co, from about 5 to about 12 wt-% cubic carbides or carbonitrides of the metals Ti, Ta and/or Nb, and balance WC with a stratified binder phase enriched surface zone from about 15 to about 40 μm thick. The inserts have an edge rounding before coating of 35-95 μm. The coating comprises a first, innermost layer of TiCxNyOz and a total thickness from about 0.1 to about 1.5 μm, a second layer of TiCxNy with a thickness of from about 4.5 to about 9.5 μm with columnar grains, a third layer of TiCxNyOz with a thickness of from about 0.3 to about 1.5 μm, a fourth layer of a smooth α-Al2O3 with a thickness of from about 4.5 to about 9.5 μm and, a from about 0.1 to about 2 μm thick colored top layer, preferably TiN or ZrN, on the clearance sides. The invention also relates to the method of making such inserts and the use thereof for heavy roughing turning operations of very large steel components.
    • 本发明涉及对于非常大的钢部件(例如用于船舶的驱动轴和用于风力发电厂的轴)的重型粗加工车削操作特别有用的涂覆切削刀具插入件。 插入件大,iC,内径圆直径大于或等于约19mm,厚度大于或等于约6mm,组成为约5至约10重量%Co,约为约 金属Ti,Ta和/或Nb的5至约12重量%的立方碳化物或碳氮化物,以及具有约15至约40μm厚的层状粘结相富集表面区域的平衡WC。 在35-95μm的涂层之前,刀片具有四边形的边缘。 涂层包括第一最内层的TiC x N y O z O z z,总厚度为约0.1至约1.5μm,第二层 层厚度为约4.5至约9.5μm的TiC x N N y Y层与柱状晶粒,第三层TiC x N N, 具有约0.3至约1.5μm的厚度的第三层平滑的α-Al 2 O 3 在间隙侧具有约4.5至约9.5μm厚度的厚度和约0.1至约2μm厚的着色顶层,优选为TiN或ZrN。 本发明还涉及制造这种刀片的方法及其用于非常大的钢部件的粗加工车削操作的用途。