method of boron carbide nozzle
is to mix B4C powder and Al alloy powder according to a predetermined chemical ratio, so that B4C particles are uniformly dispersed in the Al alloy matrix, and then pressed into a core blank with a density of 70 to 95% TD to form a homogeneous blank. The core billet is then installed in an aluminum alloy frame for sintering, and the sintered core billet is hot-rolled. When the density of the core billet reaches 70 to 95% TD, 90 ° reversing rolling is performed, and then cooled. Roll straightening. Compared with the prior art, the preparation method of the present invention has a simple process, and the high-density composite material formed by uniformly dispersing B4C powder in an aluminum matrix has better performance, in which the B4C content is as high as 65wt%.
The hardness of the boron carbide nozzle is only slightly lower than that of diamond, and it has extremely high wear resistance. The service life of the mold is 2 to 4 times that of cemented carbide. Low friction coefficient: It has a self-lubricating function, which reduces the resistance to wire drawing and is beneficial to improve Wire drawing speed is conducive to improving the apparent quality of the wire.