A kind of preparation method of cu-mocu-cu composite plate

Abstract

The invention discloses a preparation method for a Cu-MoCu-Cu composite sheet, which comprises the following steps: 1, adding additives to molybdenum powder, milling for mixing and rolling to form a thin molybdenum plate billet; 2, degreasing the thin molybdenum plate billet; 3, sintering to form a porous molybdenum plate; 4, placing the porous molybdenum plate between two copper plates for copper infiltration and coating to obtain a copper-coated molybdenum-copper alloy plate; and 5, warm rolling, annealing and leveling to obtain the Cu-MoCu-Cu composite sheet. The preparation method is simple, no special equipment is needed, and industrial production can be easily realized. The powder-rolled sheet type molybdenum skeleton capable of facilitating infiltration is subject to the copper infiltration and coating, the preparation process of the copper-coated molybdenum-copper alloy plate is shortened, the follow-up processing cost of the copper-coated molybdenum-copper alloy plate is reduced, the yield is increased, the interface of the prepared copper-coated molybdenum-copper alloy plate has high bonding performance, and the Cu-MoCu-Cu composite sheet can be prepared through rolling the copper-coated molybdenum-copper alloy plate.

Description

technical field

[0001] The invention belongs to the technical field of composite sheet preparation, and in particular relates to a method for preparing a Cu-MoCu-Cu composite sheet. Background technique

[0002] Molybdenum-copper alloy is a two-phase mixed structure consisting of molybdenum with a body-centered cubic structure and copper with a face-centered cubic structure, which neither solid dissolves nor forms intermetallic compounds. It is usually called a "pseudo-alloy". The preparation methods include infiltration method and mixed sintering method. Molybdenum copper alloy not only has the characteristics of high strength, high hardness and low expansion coefficient of molybdenum, but also has the characteristics of high plasticity and good electrical and thermal conductivity of copper. This unique comprehensive performance makes molybdenum-copper alloys widely used in electrical contact materials, heat sink materials, aerospace high-temperature materials and electron...