MECHANISM OF MULTI-LAYER COMPOSITE COATINGS IN THE ZINC PROCESS OF RECYCLING COATED WC-Co CEMENTED-CARBIDE SCRAP
MECHANISM OF MULTI-LAYER COMPOSITE COATINGS IN THE ZINC PROCESS OF RECYCLING COATED WC-Co CEMENTED-CARBIDE SCRAP
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涂层WC-Co硬质合金废料回收锌工艺多层复合涂层机理
DOI：
10.17222/mit.2017.049
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发表时间：
2017-01-01
影响因子：
0.5
通讯作者：
Yang, Chenghui
中科院分区：
文献类型：
--
作者：
Kuang, Hai;Tan, Dunqiang;Yang, Chenghui
镀层形成机理对锌工艺参数、锌回收WC粉及其后续生产具有重要意义。探讨了锌工艺中多层复合涂层的形成机理，并对再生WC粉涂层进行了研究。结果表明，该涂层在锌处理过程中形成了屏障，从而使煤化硬金属废料的回收石灰更长。由于材料的热膨胀系数不同而产生的裂纹是导致涂层破裂的主要原因，而不是反应或溶解；熔化的锌主要通过裂缝。此外，在回收的WC粉末中还发现了涂层元素和碎片。
The mechanism of a coating is crucial for the zinc-process parameters and zinc-recycled WC powders as well as the subsequent production. The mechanism of a multi-layer composite coating in a zinc process was discussed and the coating with recycled WC powders was studied. The results demonstrated that the coating created a barrier in the zinc process, resulting in a longer recycling lime for the coaled hard-metal scrap. Furthermore, cracks that appeared due to different thermal-expansion coefficients of the materials were the main reason for the breakdown of the coating, rather than the reaction or the dissolution; and the molten zinc mainly went through cracks. Additionally, the coating elements and fragments were found in the recycled WC powders.