Rolling device and method for alloy powder

Abstract

A rolling device for alloy powder comprises the parts of a first feeder, a first roller set, a second feeder and a second roller set which are vertically distributed from top to bottom. One ends of two connection rods are fixedly connected with the same sides of the first feeder and the second feeder correspondingly, and the other ends of the two connection rods are slidably connected with a slide; an outlet (13) is formed in the bottom end of the second feeder, and the width of the outlet is same as that of a primary rolled strip billet obtained through rolling of the first roller set. The invention further discloses a rolling method for the alloy powder, by adoption of two times of rolling, after the first time of rolling, misrun, cracks and figures of the primary rolled strip billet are subjected to the second time of filling rerolling, the quality of the strip billet is improved, and any friction does not exist between rollers, so that the roller heating is not caused, and the quality of a product is not affected.

Description

technical field [0001] The invention relates to a powder rolling device, in particular to an alloy powder rolling device. Background technique [0002] Alloy powder rolling is a continuous forming process in powder metallurgy. It is a powder forming method in which metal powder is continuously rolled into porous or dense plate and strip through two rotating rolls. The forming process is short, energy-saving and low-cost, and can produce plates and strips that cannot be produced by compression molding. Rolling methods mainly include powder direct rolling, powder bonded rolling and sheathed powder rolling, and the above rolling methods can feed materials in a horizontal, vertical or inclined manner. Powder bonded rolling and sheathed powder rolling require the addition of binders or are suitable for relatively active metal powders. Therefore, powder direct rolling is currently the most widely used forming method with the shortest process flow. [0003] However, due to the fa...

AI Technical Summary

Problems solved by technology

During the powder rolling process of the above-mentioned device, since the radius of the circumferential flange is different from that of the other roll, the rotational speeds of the two rolls are the same, so the linear speeds of the contact surfaces of the two rolls are different, causing frictional heat generation on the two contact surfaces, and The powder at the flange is subjected to a shear force that rotates with the flange during the rolling process. Although the production efficiency is improved, the quality of the edge of the plate and strip is affected, and the yield of the product is reduced.

Images