Raw material mixing method and preparation technology for molybdenum copper alloy for heat sinking, and product

Abstract

The invention provides a raw material mixing method for a molybdenum copper alloy for heat sinking. Raw materials of an alloy material for heat sinking comprise copper powder and molybdenum powder. The method is characterized in that the loose specific weight of the molybdenum powder is adjusted firstly, a difference value of the loose specific weight of the molybdenum powder and the loose specific weight of the copper powder is smaller than 0.5 g / cm<3>, and then according to the need of the mixing proportion, the copper powder and the molybdenum powder are mixed uniformly. According to the method, the problems that due to copper powder aggregating in the mixture of the molybdenum powder and the copper powder, in the copper infiltration and sintering process, the copper powder is fused, acopper pool with the large size is formed, and the copper distribution uniformity in the alloy material is influenced are effectively solved, the mixing uniformity of the mixture of the molybdenum andthe copper is improved, and thus the uniformity of the physical performance of the molybdenum copper alloy is improved. The invention further provides a preparation technology for the molybdenum copper alloy for heat sinking, and a product.

Description

technical field

[0001] The invention relates to a raw material mixing method of molybdenum-copper alloy for heat sink, which is used for uniform mixing of molybdenum powder and copper powder, and belongs to the field of preparation technology of molybdenum-copper alloy. The invention also relates to a preparation technology of molybdenum-copper alloy for heat sink and products. Background technique

[0002] The problem of uneven copper distribution commonly exists in the existing molybdenum-copper alloys for heat sinks, which is generally called "copper pool". It directly leads to the performance deviation of the product, such as copper content, hardness, electrical conductivity, thermal conductivity and thermal expansion coefficient, etc., will all have uneven phenomena.

[0003] The production methods of molybdenum-copper alloy for heat sink mainly include: mixed copper method, which is obtained by pressing molybdenum-copper mixed powder and then sintering in liquid phase...

Examples

preparation example Construction

[0030] The invention also protects a preparation process of molybdenum-copper alloy for heat sink. Firstly, molybdenum powder and copper powder are mixed evenly, and then the molybdenum-copper skeleton is obtained by isostatic pressing, and then the molybdenum-copper skeleton is pre-wound, and finally the Copper is wound and rolled to obtain molybdenum-copper alloy, which is characterized in that molybdenum powder and copper powder are evenly mixed by the raw material mixing method of molybdenum-copper alloy for heat sink described above, and copper powder and molybdenum powder are mixed according to the weight of copper powder. Mix at a ratio of 1%-5% of the mixing weight.

[0031] Among them, through isostatic pressing of 100MPa-250Mpa, pressing for 120-180s to obtain the molybdenum-copper skeleton; the temperature for pre-winding the molybdenum-copper skeleton is 900°C-1300°C, and the time is 60-120 minutes; the temperature for copper infiltration and winding is 1100°C-1500...

technical field

[0001] The invention relates to a raw material mixing method of molybdenum-copper alloy for heat sink, which is used for uniform mixing of molybdenum powder and copper powder, and belongs to the field of preparation technology of molybdenum-copper alloy. The invention also relates to a preparation technology of molybdenum-copper alloy for heat sink and products. Background technique

[0002] The problem of uneven copper distribution commonly exists in the existing molybdenum-copper alloys for heat sinks, which is generally called "copper pool". It directly leads to the performance deviation of the product, such as copper content, hardness, electrical conductivity, thermal conductivity and thermal expansion coefficient, etc., will all have uneven phenomena.

[0003] The production methods of molybdenum-copper alloy for heat sink mainly include: mixed copper method, which is obtained by pressing molybdenum-copper mixed powder and then sintering in liquid phase...

Examples

preparation example Construction

[0030] The invention also protects a preparation process of molybdenum-copper alloy for heat sink. Firstly, molybdenum powder and copper powder are mixed evenly, and then the molybdenum-copper skeleton is obtained by isostatic pressing, and then the molybdenum-copper skeleton is pre-wound, and finally the Copper is wound and rolled to obtain molybdenum-copper alloy, which is characterized in that molybdenum powder and copper powder are evenly mixed by the raw material mixing method of molybdenum-copper alloy for heat sink described above, and copper powder and molybdenum powder are mixed according to the weight of copper powder. Mix at a ratio of 1%-5% of the mixing weight.

[0031] Among them, through isostatic pressing of 100MPa-250Mpa, pressing for 120-180s to obtain the molybdenum-copper skeleton; the temperature for pre-winding the molybdenum-copper skeleton is 900°C-1300°C, and the time is 60-120 minutes; the temperature for copper infiltration and winding is 1100°C-1500...