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AssigneesCentral South University, Sf Diamond Co., Ltd.
InventorsShaohe Zhang, Yulu Li, Dongpeng Zhao, Xiangwang Kong, Linglong Rong, Jincheng Li, Hua Gao, Dongyu Wu, Jingjing Wu, Leilei Liu, Pinghe Sun, Haijiang Fang
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The disclosure provides a gradient structure cubic boron nitride composite sheet and a preparation method thereof. The gradient structure cubic boron nitride composite sheet consists of a cemented carbide substrate, a gradient transition layer, and a CBN layer from bottom to top. The gradient transition layer consists of N gradient layers, and the N is 4 to 18. From bottom to top, there are sequentially a first gradient layer, a second gradient layer, an Nth gradient layer, and so on. Any of the gradient layers consists of CBN and cemented carbide, in which the volume fraction of the cemented carbide in the Nth layer is 5 to 30% less than the volume fraction of the cemented carbide in the N−1th layer, and the volume fraction of the CBN in the Nth layer is 5 to 30% more than the volume fraction of the CBN in the N−1th layer.
A gradient structure cubic boron nitride composite sheet, consisting of a cemented carbide substrate, a gradient transition layer, and a CBN layer from bottom to top, wherein the gradient transition layer consists of N layers of gradient layers, the N is 4 to 18, there are sequentially a first layer of the gradient layers, a second layer of the gradient layers, and Nth layer of the gradient layers from bottom to top, any one layer of the gradient layers consists of CBN and cemented carbide, a volume fraction of the cemented carbide in the Nth layer is 5 to 30% less than a volume fraction of the cemented carbide in the N−1th layer, and a volume fraction of the CBN in the Nth layer is 5 to 30% more than a volume fraction of the CBN in the N−1th layer.
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