Forming of Biocompatible Materials in the Semi-Solid State
Forming of Biocompatible Materials in the Semi-Solid State
复制标题
半固态生物相容性材料的形成
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
M. Liewald
中科院分区：
文献类型：
--
作者：
L. Kertesz;M. Liewald
材料的半固态加工提供了锻造和铸造的优点。近年来，针对“近净形”生产技术进行了高熔点和生物相容性合金的实验。先进的试验表明，通过半固态成形加工这些材料，为可行的工件形状提供了巨大的潜力，并大大减少了加工时间和后续的表面处理工作。与在相对低的温度水平下的铝合金的半固态成形相比，由于较高的成形温度，半固态下的高熔点合金的任何加工都更具挑战性。常用的刀具材料由于润湿、粘合和熔化过程而引起高磨损率，最终导致刀具寿命非常短。因此，必须找到更合适的材料和复合材料，以形成能够承受腐蚀、磨损、撕裂和极端温度变化的工具和模具。开发基于这种新材料的长寿命接近生产工具的新设计理念将是未来的目标。
Semi-solid processing of materials provides advantages of both forging and casting. Experiments with high-melting and biocompatible alloys aiming at a “near-net-shape” production technology recently have been conducted. Advanced trials showed, that processing of such materials by means of semi-solid forming deliver a huge potential for feasible workpiece shapes and drastically reduces machining time and subsequent surface treatment efforts. In contrast to semi-solid forming of aluminium alloys at relatively low temperature levels any processing of high-melting point alloys in the semi-solid state is much more challenging due to higher forming temperature. Commonly used tool materials provoke high wear rates due to wetting, bonding and melting processes which finally result in a very short tool life time. Thus, more apt materials and composites for forming tools and dies which can withstand corrosion, wear, tear and extreme changes in temperatures have to be found. The development of new design concepts for long-living close-to-production tools based on such new materials will be a future goal.