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论文类型：期刊论文

发表时间：2014-01-01

发表刊物：Computer Modelling and New Technologies

收录刊物：EI

卷号：18

期号：12

页面范围：361-366

ISSN号：14075806

摘要：Two different filler metal is used to join polycrystalline diamond (PCD) compact into a cemented carbide substrate. The effect of brazing holding technology on shearing strength and microstructure of brazing seam in hi-frequency induction brazing is investigated. Based on analyses of the microstructure of brazing joints by means of scanning electron microscope (SEM) and electron probe microanalyzer (EPMA), it is indicated that the shearing strength of brazing joints increased with the increase of heat preservation temperature; however, the shearing strength increased first and decreased afterward with the prolonging of heat preservation time. And the shearing strength of PCD cutting tools using the way of post-weld heat preservation is higher than that of those using plaster power cooling or air cooling. Thermal damage happened on the PCD cutting tools, and the damage became serious gradually with the increase of post-weld heat preservation time.