Application of Thin Hard Coating for Micro-Extrusion

实现微成形最重要的技术是TiCrN、CrN、TiN、TiAIN、DLC等硬质涂层的应用技术。用熨衣式摩擦试验机和其他摩擦试验机进行摩擦试验的结果如下：1)这种硬质涂层模具与SKD11模具的附着力有很大差异。对于硬质涂层模具，摩擦系数与产品表面粗糙度无关。2)DLC-Si的摩擦系数最小。因此，DLC应该是微/细观成形的最佳涂层。但在高温下，类金刚石涂层的形成能力下降。多层类金刚石涂层与表面的结合强度较高，并具有较好的摩擦学特性，有望在不久的将来实现微/细观结构的形成。

The mast important technology to realize the micro-forming should be the application technique of them hard coating such as TiCrN, CrN, TIN, TiAIN, and DLC etc.. Results of tribo-test by ironing-type tribometer and other friction testing machine are as follows.1)Appearances of adhesion are quite different among this hard coating dies and SKD11 die. In the case of hard coating dies, there is no relation between friction coefficient and products surface roughness.2) DLC-Si should the lowest friction coefficient. Therefore DLC should be the best coating for micro/meso forming. But at high temperature the ability of DLC decreased.Multi-layered DLC shows belier adhesive strength to the surface and are expedite to have belier tribo-characteristies such kinds of these coating will realize micro/meso forming in the near future.