Formula and production technology of complex manganese aluminum bronze welding wire

Abstract

The invention discloses a formula and a production technology of a complex manganese aluminum bronze welding wire. The formula of the complex manganese aluminum bronze welding wire is that the complexmanganese aluminum bronze welding wire comprises the following components: 8% to 10% of Mn, 6.5% to 8.5% of Al, 1.2% to 3.0% of Fe, 1.5% to 3.0% of Ni and 0.03% to 0.1% of Si, and the balance being Cu. The production technology of the complex manganese aluminum bronze welding wire comprises the steps of material preparation; smelting; heat preservation; horizontal continuous casting; drawing andannealing; peeling and product drawing; winding (or barreling, straightening cutting, large wood shaft winding); inspection; and packaging storage. According to the formula and the production technology, Mn, Al, Fe, Ni and Si are added, impact resistance, strength, hardness, thermal stability and corrosion resistance are improved, and roundness and flatness of weld seams are improved; and operation steps of the production technology are simple and convenient, the steps are complete, and quality of the produced welding wire is high; and the welding wire is used for a hydraulic cylinder of a hydraulic bracket in mining machinery, and the service life is 4 times or above longer than the original service life.

Description

technical field [0001] The invention relates to the field of copper alloy welding wire, in particular to a formula and production process of complex manganese-aluminum bronze welding wire. Background technique [0002] Hydraulic supports in mining machinery are mainly composed of hydraulic cylinders and hydraulic rods. The surrounding environment of the hydraulic support is harsh, and it must bear dynamic and static loads during use. The force transmission medium is emulsion (95% water + 5% oil). The inner surface of the hydraulic cylinder of the traditional bracket is the cylinder material itself, generally low or medium alloy steel such as 27SiMn, 42CrMo, and the service life is scrapped due to corrosion and wear after 1-2 years; some manufacturers have also used inner surface electroplating to improve the service life. Life, but it is difficult to avoid capillary pinholes (invisible to the naked eye) due to electroplating, and pits are formed at the pinholes due to rust ...

AI Technical Summary

Problems solved by technology

The inner surface of the hydraulic cylinder of the traditional bracket is the cylinder material itself, generally low or medium alloy steel such as 27SiMn, 42CrMo, and the service life is scrapped due to corrosion and wear after 1-2 years; some manufacturers have also used inner surface electroplating to improve the service life. Life, but it is difficult to avoid capillary pinholes (invisible to the naked eye) due to electroplating, and pits are formed at the pinholes due to rust and fall off. When there are enough pits, they will be scrapped. Environmental pollution cannot be ignored

[0003] The patent name is: a silicon bronze welding wire and its production process; the patent number is: 201711205934.9; its components and their weight percentages are: silicon content 2.55%-2.7%, manganese content 0.85%-0.9%, magnesium content 0.85%- 0.9%, phosphorus content 0.085% ~ 0.09%, tin content 0.085% ~ 0.09%, zinc content 0.085% ~ 0.09%, indium content 0.0085% ~ 0.009%, oxygen content is less than 5ppm, the balance is copper; silicon bronze alloy welding wire The production process is: continuous casting, continuous extrusion, peeling, rolling, heat treatment, wire drawing, stress relief annealing; the tensile strength of the prepared silicon bronze welding wire is greater than 400MPa, and the elongation is greater than 50%, but the hardness is low. Between HB80-HB150, the inner surface of the hydraulic cylinder of the hydraulic support cannot meet the requirements of higher hardness and superior corrosion resistance.

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