The effects of rare earth (RE) elements on properties and microstructure of WC-14TiC-8Co cemented carbide have been investigated. By adding RE, the characteristics such as bending strength and impact-resistance were g...The effects of rare earth (RE) elements on properties and microstructure of WC-14TiC-8Co cemented carbide have been investigated. By adding RE, the characteristics such as bending strength and impact-resistance were greatly improved. The existence form and distribution of RE in cemented carbide have also been studied by means of SEM and TEM. The results. have been used to elucidate the strengthening mechanism of RE in WC-14TiC-8Co alloy.展开更多
The morphology,structure and distribution of the rare earth compounds in the YG8R.YT5R and YT14R cemented carbides with additions of trace light rare earths were studied with an analytical electron microscope. The par...The morphology,structure and distribution of the rare earth compounds in the YG8R.YT5R and YT14R cemented carbides with additions of trace light rare earths were studied with an analytical electron microscope. The particles of the rare earth compounds in these alloys are all spherical and distribute at interfaces between the Co-cement phase and WC hard phase or(TiW)C solid solution,and in the(TiW)C solid solution.In the YG8R and YTI4R alloys,the rare earth compound is RE_2O_3 with a bcc structure,while in the YT5R alloy. the rare earth compound is RE_2O_2S with a hcp structure.展开更多
文摘The effects of rare earth (RE) elements on properties and microstructure of WC-14TiC-8Co cemented carbide have been investigated. By adding RE, the characteristics such as bending strength and impact-resistance were greatly improved. The existence form and distribution of RE in cemented carbide have also been studied by means of SEM and TEM. The results. have been used to elucidate the strengthening mechanism of RE in WC-14TiC-8Co alloy.
文摘The morphology,structure and distribution of the rare earth compounds in the YG8R.YT5R and YT14R cemented carbides with additions of trace light rare earths were studied with an analytical electron microscope. The particles of the rare earth compounds in these alloys are all spherical and distribute at interfaces between the Co-cement phase and WC hard phase or(TiW)C solid solution,and in the(TiW)C solid solution.In the YG8R and YTI4R alloys,the rare earth compound is RE_2O_3 with a bcc structure,while in the YT5R alloy. the rare earth compound is RE_2O_2S with a hcp structure.
