Production process of niobium carbide hard alloy roller ring

Abstract

The invention relates to the technical field of hard alloy production, in particular to a production process of a niobium carbide hard alloy roller ring. The production process of the niobium carbidehard alloy roller ring comprises the following process steps that A, burdening is conducted, and specifically, 65wt%-75wt% of WC powder, 6.5wt%-8.5wt% of Ni powder and 16.5wt%-28.5wt% of NbC powder, in percentage by mass, are mixed; B, wet grinding is conducted, and specifically, the mixed powder in the step A is added into a tilting ball mill, and alcohol is added according to the ratio of alloyballs of 5 to 1, the rotating speed is 32 r / min, and the ball milling time is not less than 30-36 hours; C, drying is conducted, and specifically, the pulped material produced by the ball milling in the step B is sequentially sieved, wax is added, and the pulped material is conveyed to a spray tower to prepare powder particles; D, compression molding is conducted, and specifically, the powder particles prepared in the step C are added into a mold cavity, and the mold cavity is matched according to the shape of the roller ring required to be produced so as to press the powder particles into a blank; and E, sintering is conducted, the blank is put into a sintering furnace to be sintered and formed. According to the process, the roll ring is prepared, so that the metallographic structure of the roll ring is more uniform, so that the wear resistance of the roll ring is improved.

Description

technical field [0001] The invention relates to the technical field of hard alloy production, in particular to a production process for niobium carbide hard alloy roll rings. Background technique [0002] Cemented carbide roll rings are commonly used materials in mechanical processing, and are mostly used for rolling wire and plate materials. At this stage, most of the cemented carbide roll rings use WC as the matrix and transition metals (iron, cobalt, nickel) as the binder phase. , and then add a small amount of other components, using powder metallurgy technology, let the mixture go through wet grinding, drying, and sintering. [0003] Since Co, the binder phase of WC-Co cemented carbide, is a rare strategic resource and tungsten is a non-renewable resource, the cost of the alloy is relatively high; in addition, during the use of the cemented carbide roll ring, the rolling groove surface of the roll ring is affected High-speed impact, the billet is easy to be squeezed an...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of the hard alloy roll ring in the related art, such as poor impact resistance, high temperature resistance, wear resistance and high manufacturing cost, an embodiment of the present invention provides a production process for a niobium carbide hard alloy roll ring. The purpose is to use NbC to replace part of WC, and Ni to replace the binder phase Co, so that the hardness of the roller ring is improved, and the high temperature resistance of the cemented carbide roller ring is greatly improved.