CN101829880A

CN101829880A - Production process for silicon bronze bar for railway electrification

Info

Publication number: CN101829880A
Application number: CN200910025322A
Authority: CN
Inventors: 孙江强
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-10
Filing date: 2009-03-10
Publication date: 2010-09-15

Abstract

The invention discloses a production process for a silicon bronze bar for railway electrification. The silicon bronze bar consists of the following components in percentage by weight: 95 percent of electrolytic copper, 3 percent of silicon and 1 to 1.5 percent of electrolytic manganese. The production process comprises the following steps: performing smelting in a low-frequency furnace at the temperature of between 1,220 and 1,260 DEG C; semi-continuously casting a round ingot at the rate of between 150 and 180 r/min, the vibration frequency of 300 r/min and the amplitude of 3 to 4mm; sawing the ingot; heating the ingot with a heating furnace to a temperature between 780 and 800 DEG C; extruding the ingot with an extruder at a rate of 0.5 to 1m/s and stripping the ingot by 1 to 1.5mm; rolling the ingot with a secondary rolling machine, drawing the ingot and annealing the ingot in a vacuum furnace respectively, wherein the annealing temperature is 600+/-10 DEG C; preserving heat for 3 hours; cooling ingot along with the furnace at the vacuum degree of 10 to 1Pa; aligning and checking the ingot according to the requirements of drawings, wherein the tensile strength Pa is more than or equal to 380MPa and the extensibility delta5 is more than or equal to 40 percent; considering the product to be qualified when the surface has no scratch, pit, air hole or the like; and packaging and warehousing the product. The production process has high corrosion resistance and high plasticity, produces no spark upon collision and meets the requirements of the silicon bronze bar for railway electrification.

Description

The production technology of silicon bronze bar for railway electrification

Technical field: the production technology that the present invention relates to silicon bronze bar for railway electrification.

Background technology: along with the needs of domestic railway electrification construction development, the demand of silicon bronze bar for railway electrification is increased sharply rapidly.Present silicon bronze bar for railway electrification decay resistance is bad, and plasticity is poor, is subjected to percussion easily to produce spark, has potential safety hazard.

Summary of the invention: purpose of the present invention is exactly the production technology that a kind of silicon bronze bar for railway electrification will be provided, and it can overcome the existing problem of present silicon bronze bar for railway electrification well.The object of the present invention is achieved like this, and the production technology of silicon bronze bar for railway electrification is characterized in that: composition and weight ratio are wherein Cu+ Trace Ag content 〉=99.95% of cathode copper 95%, silicon 3%, and electrolytic manganese 1-1.5% is Mn content 〉=99.7% wherein; Enter the low-frequency furnace melting, 1220 ℃-1260 ℃ of smelting temperatures; Sample is got in on-the-spot sample analysis, detects the content of copper, silicon, manganese, silicone content 2.7-3.5%, and manganese 1-1.5%, copper 95-96.3% are qualified; Semicontinuous cast billet, casting speed 150-180 rev/min, 300 rev/mins of vibration frequencies, amplitude 3-4mm; Sawing, sawing length 250mm; The heating furnace heating, 780-800 ℃ of ingot blank heating-up temperature; The extruder extruding, extrusion speed 0.5-1 meter per second, decortication thickness 1-1.5mm; Section bar is one-step forming just, and whether check extruding size adheres to specification; Cut off; The head rolling machine dog; Drawing for the first time; Vacuum drying oven annealing, 600 ± 10 ℃ of annealing temperatures are incubated 3 hours, with stove cooling, vacuum 10 ^-1Pa; Clean and the secondary dog; Drawing for the second time; Vacuum drying oven annealing, 600 ± 10 ℃ of annealing temperatures are incubated 3 hours, with stove cooling, vacuum 10 ^-1Pa; Sawing is according to the designing requirement scale; The straightening check, shape meets the drawing requirement, tensile strength Pa 〉=380M Pa, percentage elongation δ ₅〉=40%, defectives such as the no scuffing in surface, pit, sand holes are qualified; The packing warehouse-in.Decay resistance of the present invention is good, and plasticity is good, is subjected to percussion not produce spark, satisfies the requirement of silicon bronze bar for railway electrification.

The specific embodiment:

The production technology of silicon bronze bar for railway electrification is characterized in that: composition and weight ratio are wherein Cu+ Trace Ag content 〉=99.95% of cathode copper 95%, silicon 3%, and electrolytic manganese 1-1.5% is Mn content 〉=99.7% wherein; Enter the low-frequency furnace melting, 1220 ℃-1260 ℃ of smelting temperatures; Sample is got in on-the-spot sample analysis, detects silicone content 2.7-3.5%, and manganese 1-1.5%, copper 95-96.3% are qualified; Semicontinuous cast billet, casting speed 150-180 rev/min, 300 rev/mins of vibration frequencies, amplitude 3-4mm; Sawing, sawing length 250mm; The heating furnace heating, 780-800 ℃ of ingot blank heating-up temperature; The extruder extruding, extrusion speed 0.5-1 meter per second, decortication thickness 1-1.5mm; Section bar is one-step forming just, and whether check extruding size adheres to specification; Cut off; The head rolling machine dog; Drawing for the first time; Vacuum drying oven annealing, 600 ± 10 ℃ of annealing temperatures are incubated 3 hours, with stove cooling, vacuum 10 ^-1Pa; Clean and the secondary dog; Drawing for the second time; Vacuum drying oven annealing, 600 ± 10 ℃ of annealing temperatures are incubated 3 hours, with stove cooling, vacuum 10 ^-1Pa; Sawing is according to the designing requirement scale; The straightening check, shape meets the drawing requirement, tensile strength Pa 〉=380M Pa, percentage elongation δ ₅〉=40%, defectives such as the no scuffing in surface, pit, sand holes are qualified; The packing warehouse-in.During concrete enforcement, press composition and ratio requirement, prepare each component, when entering the low-frequency furnace melting, need be sequentially added into and stir and make uniform ingredients, add the copper melting earlier according to required gross weight, treat the copper fusing after, manganese addition, silicon again, smelting temperature is controlled at 1240 ℃; It is 12cm with the charcoal cladding thickness that semi-finished product are come out of the stove back; Sample is got in on-the-spot sample analysis, detects the content of copper, silicon, manganese with atomic absorption instrument, silicone content 3.%, and manganese content 1.3%, copper content 95.6% is qualified; Semicontinuous cast billet adopts The circle crystallizer, crystallizer inner metal liquid face covers with the charcoal ash, and casting speed is controlled at 165 rev/mins, and vibration frequency is controlled at 300 rev/mins, and amplitude is controlled at 3.5mm; Sawing detects the ingot blank surface quality, sawing length 250mm; The heating furnace heating, 790 ℃ of ingot blank heating-up temperatures are guaranteed the internal and external temperature unanimity; The extruder extruding, extrusion speed is controlled at 0.75 meter per second, decortication thickness 1.2mm; Section bar is one-step forming just, and whether check extruding size adheres to specification; Cut off; The head rolling machine dog; Whether drawing for the first time detects the each several part size and adheres to specification; Vacuum drying oven annealing, 600 ℃ of annealing temperatures are incubated 3 hours, with stove cooling, vacuum 10 ^-1Pa; Clean and the secondary dog; Draw for the second time, pull out detection each several part size and whether adhere to specification; Vacuum drying oven annealing, 600 ℃ of annealing temperatures are incubated 3 hours, with stove cooling, vacuum 10 ^-1Pa; Sawing is according to the designing requirement scale; Straightening, check by the figure requirement, detect each several part size, tensile strength Pa 〉=380M Pa, percentage elongation δ with projecting apparatus, micrometer, clearance gauge ₅〉=40%, defectives such as the no scuffing in surface, pit, sand holes are qualified products; The packing warehouse-in.

Claims

1. the production technology of silicon bronze bar for railway electrification, it is characterized in that: composition and weight ratio are wherein Cu+ Trace Ag content 〉=99.95% of cathode copper 95%, silicon 3%, electrolytic manganese 1-1.5% is Mn content 〉=99.7% wherein; Enter the low-frequency furnace melting, 1220 ℃-1260 ℃ of smelting temperatures; Sample is got in on-the-spot sample analysis, detects silicone content 2.7-3.5%, and manganese 1-1.5%, copper 95-96.3% are qualified; Semicontinuous cast billet, casting speed 150-180 rev/min, 300 rev/mins of vibration frequencies, amplitude 3-4mm; Sawing, sawing length 250mm; The heating furnace heating, 780-800 ℃ of ingot blank heating-up temperature; The extruder extruding, extrusion speed 0.5-1 meter per second, decortication thickness 1-1.5mm; Section bar is one-step forming just, and whether check extruding size adheres to specification; Cut off; The head rolling machine dog; Drawing for the first time; Vacuum drying oven annealing, 600 ± 10 ℃ of annealing temperatures are incubated 3 hours, with stove cooling, vacuum 10 ^-1Pa; Clean and the secondary dog; Drawing for the second time; Vacuum drying oven annealing, 600 ± 10 ℃ of annealing temperatures are incubated 3 hours, with stove cooling, vacuum 10 ^-1Pa; Sawing is according to the designing requirement scale; The straightening check, shape meets the drawing requirement, tensile strength Pa 〉=380M Pa, percentage elongation δ ₅〉=40%, defectives such as the no scuffing in surface, pit, sand holes are qualified; The packing warehouse-in.