Composite molybdenum wire used for linear cutting and manufacturing method

Abstract

The invention discloses a composite molybdenum wire used for linear cutting and a manufacturing method. The composite molybdenum wire is made of molybdenum powder containing solid solution metal elements and rare earth oxide. The solid solution metal elements are selected from at least one of Co, W, Ni, Hf or Re, and the weight content of the solid solution metal elements is 0.01%-0.30%. The rare earth oxide is selected from at least one of La2O3 or Y2O3, and the weight content of the rare earth oxide is 0.005%-0.20%. The manufacturing method comprises the following steps that secondary solid-liquid mixing is conducted, and uniform mixed molybdenum powder is obtained; then a molybdenum rod billet is obtained through pressing; the sintered molybdenum rod billet is rolled into a molybdenum coil rod; then the composite molybdenum wire used for linear cutting is obtained through drawing by repeatedly conducting a hot draw technique and a cold draw technique; and annealing is conducted repeatedly in the process, and the composite molybdenum wire is obtained. According to the composite molybdenum wire used for linear cutting, the abrasion resistance can be substantially improved, the service life is longer during cutting, the cutting speed is higher, and the rate of finished products is larger.

Description

technical field [0001] The invention relates to a molybdenum wire for wire-cutting used for fast wire-running and intermediate wire-running, in particular to a molybdenum wire for wire-cutting with doping and composite strengthening and a manufacturing method thereof. Background technique [0002] The electrode wire for wire electric discharge cutting is mainly molybdenum wire. Molybdenum wire is an ideal electrode wire for wire electric discharge cutting machine tools. It can cut various steel materials and hard alloys, and process parts with extremely complicated shapes. To improve the precision of the mold. It is usually selected as an ideal electrode tool for high-speed WEDM processing due to its advantages of low price, good toughness, high strength, good electrical conductivity and low elongation. [0003] At present, most of the grades of wire cutting molybdenum wire in the domestic market are pure molybdenum metal, and the use effect in wire cutting processing is un...

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Problems solved by technology

[0003] At present, most of the grades of wire cutting molybdenum wire in the domestic market are pure molybdenum metal, and the use effect in wire cutting processing is uneven. , broken wire and other problems; some manufacturers add rare earth oxide 2500ppm ~ 5000ppm La in molybdenum 2 o 3 , Y 2 o 3 etc., by adding La 2 o 3 , Y 2 o 3 The strength of molybdenum wire can be improved by achieving dispersion strengthening; in order to reduce costs and improve production efficiency, our company has introduced large rolling mill technology, which has a large deformation rate and rolls molybdenum billets from Φ50mm-Φ75mm to Φ4mm-Φ8mm Molybdenum wire rod, but with La 2 o 3 , Y 2 o 3 When the content of rare earth oxides increases to more than 5000ppm, the crack rate will continue to rise, resulting in a low A material rate, and a high crack rate will easily lead to abnormal broken wires during the use of wire-cut molybdenum wire, and short cutting life.

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