Refractory metal alloy ultrathin plate and foil, as well as producing method of plate

Abstract

The invention discloses a refractory metal alloy ultrathin plate, a foil, and a producing method of the plate. The method for producing the ultrathin plate comprises the following steps of: (1) uniformly mixing the raw material, namely 50-99% of tungsten powder or molybdenum powder and 50-1% of one or more of the following materials of iron powder, nickel powder and copper powder with ethanol so as to obtain a mixture, wherein the usage of the ethanol is relatively lower than 0.5% of the total weight of the raw material; (2) preheating the mixture at 120-140 DEG C, and pressing after uniform heating, so that a raw slab with the thickness of 0.3-0.9millimeter is produced; and (3) sintering and cooling the raw slab under an anaerobic condition, so that the refractory metal alloy ultrathin plate is obtained. According to the producing method, a binding agent is not added, so that a step for removing the binding agent during the subsequent processes is reduced, the material purity is ensured, moreover, the production cost is also greatly lowered, and the production efficiency is increased. The refractory metal alloy ultrathin plate has a uniform internal organizational structure and has the thickness of 0.25-0.8millimeter, and one to six passes of rolling or short-time grinding only needs to be carried out subsequently, so that a high-specific-gravity foil product with the thickness of 10-50mu m can be produced.

Description

technical field

[0001] The invention relates to the field of alloy preparation, in particular to a refractory metal alloy ultra-thin plate and foil, and a preparation method thereof. Background technique

[0002] In the refractory metal material industry, refractory metals and their alloy materials with a plate thickness of less than 0.1mm are usually called foils; refractory metals and their alloy materials with a plate thickness of 0.1-3mm are called thin plates; material thickness Most of the sheets concentrated in the range of 0.1mm to 1mm are named "ultra-thin sheets". The existing production technologies of refractory metal alloy ultra-thin sheets at home and abroad mainly include powdered sintering method and traditional sintering and rolling method.

[0003] The powdered sintering method is as described in the US patent (US 4605599A), but the material produced by this process has a low density, and a composition gradient and a density gradient are formed in the thic...