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Title:: Effect of on micro-alloying elements on the properties of cemented carbides

摘要:: 為改善金屬-陶瓷復(fù)合材料的物理、化學(xué)及機(jī)械性能，通常會(huì)在其中添加微量合金元素，然而如果添加方法不同、或后續(xù)處理方法不當(dāng)，則合金元素的功效無(wú)法完全發(fā)揮，甚至?xí)霈F(xiàn)負(fù)面效應(yīng)。而這些最終都可歸結(jié)到對(duì)微量元素的精確控制。硬質(zhì)合金屬于金屬-陶瓷復(fù)合材料中最重要的材料之一，因此，本文首先詳細(xì)概括總結(jié)了常見(jiàn)的微量合金元素對(duì)硬質(zhì)合金的制備、組織結(jié)構(gòu)和性能的影響。并詳細(xì)分析研究了微量合金元素的來(lái)源、在硬質(zhì)合金中的作用機(jī)理，及其精確控制難點(diǎn)。最后根據(jù)其作用機(jī)理，提出一些可能的有效措施用于精確控制微量合金元素在硬質(zhì)合金中的含量，相組成，存在狀態(tài)，分布等。以期能為硬質(zhì)合金的生產(chǎn)實(shí)際提供一些理論指導(dǎo)。

Abstract:: In order to improve the physical, chemical and mechanical properties of metal-ceramic composite materials, some micro-alloying elements have usually been added, but due to some different adding methods or some improper subsequent processing methods, the efficacy of micro-alloying elements can not fully play, and even some negative effects have been caused. Ultimately the above results can be attributed to the precise controlling of micro-alloying elements. Cemented carbide is one of the most important materials in metal-ceramic composite materials. Therefore, in this paper, effects of micro-alloying elements on the preparation, microstructure and properties of cemented carbides have been detailedly summarized. The sources of micro-alloying elements, their action mechanisms in cemented carbide, and their precise controlling difficulties have been analyzed and studied. Based on their action mechanisms in cemented carbide, some possible effective measures are proposed to precisely control the content, phase composition, existence state, distribution etc., in cemented carbide. And some theoretical assistances can been guided to the actual production of cemented carbide.