Near-Net Forming Complex Shaped Zr-Based Bulk Metallic Glasses by High Pressure Die Casting.
Near-Net Forming Complex Shaped Zr-Based Bulk Metallic Glasses by High Pressure Die Casting.
复制标题
高压压铸近净成形复杂形状锆基大块金属玻璃
DOI：
10.3390/ma11112338
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发表时间：
2018-11-21
期刊：
影响因子：
--
通讯作者：
Li L
中科院分区：
文献类型：
--
作者：
Liu L;Zhang T;Liu Z;Yu C;Dong X;He L;Gao K;Zhu X;Li W;Wang C;Li P;Zhang L;Li L
使用铸造工艺形成复杂的几何形状对于块体金属玻璃（BMG）来说是一个很大的挑战，因为在所需的高冷却速率下缺乏用于成形的窗口的时间。在这项工作中，我们开发了一种名为“全过程真空高压压铸”（EPV-HPDC）的方法，该方法能够在毫秒内用熔融金属填充模具，并在高压下凝固。在此基础上，采用工业级原料制备了多种锆基非晶合金。结果表明，采用EPV-HPDC工艺可以制备出尺寸为3 mm × 10 mm、强度较高的Zr基非晶合金。此外，已经发现EPV-HPDC工艺允许复杂的工业BMG零件精确地净成形，其中一些零件难以通过任何其他金属工艺形成。与其他方法相比，EVP-HPDC工艺制备的BMG构件具有尺寸精度高、效率高、成本低等优点。EVP-HPDC工艺为BMG的大规模应用铺平了道路。
Forming complex geometries using the casting process is a big challenge for bulk metallic glasses (BMGs), because of a lack of time of the window for shaping under the required high cooling rate. In this work, we open an approach named the “entire process vacuum high pressure die casting” (EPV-HPDC), which delivers the ability to fill die with molten metal in milliseconds, and create solidification under high pressure. Based on this process, various Zr-based BMGs were prepared by using industrial grade raw material. The results indicate that the EPV-HPDC process is feasible to produce a glassy structure for most Zr-based BMGs, with a size of 3 mm × 10 mm and with a high strength. In addition, it has been found that EPV-HPDC process allows complex industrial BMG parts, some of which are hard to be formed by any other metal processes, to be net shaped precisely. The BMG components prepared by the EVP-HPDC process possess the advantages of dimensional accuracy, efficiency, and cost compared with the ones formed by other methods. The EVP-HPDC process paves the way for the large-scale application of BMGs.
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影响因子：
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