A production process of brass alloy carbon steel wire

Abstract

The invention discloses a production process of brass alloy carbon steel wire, and relates to the technical field of steel wire production. The production process of brass alloy carbon steel wire in the invention includes: electric heating, salt bath quenching, water cooling, primary pickling, copper plating, galvanizing, hot water preheating, MF medium frequency thermal diffusion, secondary pickling, soap soaking and winding; firstly, a 0.5 mm steel wire is heated with a tubular electric heating furnace to obtain a heat-treated steel wire; then, a mixed salt of potassium carbonate and sodium carbonate is used to salt bath quench the steel wire to obtain a salt bath quenched steel wire; then, water cooling is used to cool the salt bath quenched steel wire to room temperature, and then, after pickling with a hydrochloric acid solution, water washing, copper plating, water washing, galvanizing, and water washing are obtained to obtain an electroplated steel wire; after the electroplated steel wire is preheated with hot water, MF medium frequency thermal diffusion is performed, and then, a phosphoric acid solution is used to pickle, wash, soap soak, dry, and wind up to obtain a brass alloy carbon steel wire. The brass alloy carbon steel wire prepared by the invention has a small strength dispersion and a uniform brass alloy thickness.

Description

Technical Field

[0001] The invention relates to the technical field of steel wire production, in particular to a production process of brass alloy carbon steel wire. Background Art

[0002] Today, China's photovoltaic industry ranks first in the world in terms of slicing technology and output. The slicing technology has been completely replaced by diamond wire cutting from the original mortar wire cutting. The quality of diamond wire is not only related to the quality of sand plating, but the most direct factor is related to the diamond wire busbar. The most fundamental factor that determines the quality of diamond wire busbar is whether it has brass alloy carbon steel wire (referred to as "yellow wire" in the industry) with uniform base material structure, uniform coating, and uniform extreme performance (strength, plasticity).

[0003] The furnace heating in the traditional yellow wire production process uses a natural gas open flame furnace for heating. The furnace atmosphere control depends entirely on the experience of the personnel and is extremely difficult to control. When the oxygen content in the furnace is not well controlled, the oxygen oxidizes and combines with the carbon element in the steel wire during the heating process, and the steel wire is easily decarburized, resulting in the product being unable to continue further deep processing.

[0004] In the traditional yellow wire production process, the heated steel wire is generally quenched in a water bath. The water bath quenching of high carbon steel (carbon content > 0.9%) steel wire has reached the limit of the process capability, resulting in excessive strength of the steel wire after quenching and brittleness, which cannot be further processed and drawn. In addition, the strength dispersion between the steel wires after water bath quenching is too large, and the extreme difference can reach 60 MPa. The strength dispersion of the busbar corresponding to consistent production is too large.

[0005] The copper plating and galvanizing in the traditional yellow wire production process use centralized control technology, that is, multiple steel wires use the same electrode to supply current. The actual current distribution of a single steel wire varies greatly, and the extreme difference can reach about 10A, which causes a huge difference in the coating data between the steel wires. Summary of the invention

[0006] The purpose of the present invention is to provide a production process of brass alloy carbon steel wire to solve the problems existing in the prior art.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A production process of brass alloy carbon steel wire, comprising the following steps: electric heating, salt bath quenching, water cooling, primary pickling, copper plating, galvanizing, hot water preheating, MF medium frequency heat diffusion, secondary pickling, and soap soaking.

[0009] Furthermore, the production process of the brass alloy carbon steel wire comprises the following steps:

[0010] (1) placing a 0.5 mm steel wire in a tubular electric heating furnace and heating it for 18 seconds under nitrogen protection conditions to heat the steel wire to 900-950° C. to obtain a heat-treated steel wire;

[0011] (2) The heat-treated steel wire is placed in a primary salt bath quenching tank, quenched for 6 seconds with a mixed salt at 580-610°C, and then placed in a secondary salt bath quenching tank, quenched for 4 seconds with a mixed salt at 620-650°C, to obtain a salt bath quenched steel wire;

[0012] (3) At room temperature, the salt-bath quenched steel wire is placed in a water cooling tank and water-cooled for 2 seconds to obtain a water-cooled steel wire;

[0013] (4) The water-cooled steel wire is placed in a hydrochloric acid tank, pickled with a 15% hydrochloric acid solution at 60° C. for 4 seconds, and then placed in a water washing tank at room temperature for 4 seconds to obtain a steel wire after primary pickling;

[0014] (5) The steel wire after the primary pickling is fed into a single-wire single-control plating tank at a speed of 70 m / min, with a copper pyrophosphate solution and copper particles as the anode and a flip-type electrode gun as the cathode, and the rectifier of the single corresponding steel wire is energized. After copper plating at 50.7 to 53.9 A for 19 to 20 seconds, the steel wire is placed in a water washing tank at room temperature and washed for 4 seconds to obtain a copper-plated steel wire;

[0015] (6) The copper-plated steel wire enters a single-wire single-control plating tank at a speed of 70 m / min, with zinc sulfate solution and copper particles as anodes and a flip-type electrode gun as cathodes, and the rectifier of a single corresponding steel wire is energized. After zinc plating at 19.6 to 20.9 A for 19 to 20 seconds, the wire is placed in a water washing tank at room temperature and washed for 4 seconds to obtain the electroplated steel wire;

[0016] (7) The electroplated steel wire is placed in a preheating tank and preheated to 80-90° C. with 90° C. water to obtain a preheated steel wire;

[0017] (8) The preheated steel wire was subjected to MF medium frequency diffusion at 530°C for 8 seconds to obtain a heated steel wire;

[0018] (9) The heated steel wire is placed in a phosphoric acid bath, pickled with a 3% phosphoric acid solution at 30° C. for 3 seconds, and then placed in a water washing bath at room temperature for 4 seconds to obtain a steel wire after secondary pickling;

[0019] (10) The steel wire after secondary pickling is placed in a soap immersion tank, immersed in a 10% by mass linolenic acid solution at 90° C. for 2 seconds, dried at 170-190° C. for 4 seconds, and then wound at 60 m / min to obtain a brass alloy carbon steel wire.

[0020] Furthermore, the tubular electric heating furnace in step (1) is provided with 9 heating zones, each zone is 2 m long, and each zone has the same temperature, which is 900-950°C.

[0021] Furthermore, the mixed salt in step (2) is a mixture of potassium carbonate and sodium carbonate, wherein the mass proportion of sodium carbonate is 15-30%.

[0022] Furthermore, the single-filament single-control plating tank in steps (5) and (6) is divided into 18 groups of independent tank bodies, with a total length of 1.4m*18=25.2m.

[0023] Furthermore, in step (5), the copper pyrophosphate solution has a mass fraction of 2.3-3.3%, a coke ratio of 6.5-8.5, and a pH of 8-8.8.

[0024] Furthermore, the mass fraction of the zinc sulfate solution in step (6) is 17-29%.

[0025] Furthermore, the brass alloy coating weight of the brass alloy carbon steel wire in step (10) is 11.7-12.3 g / kg, the copper content is 68.5-71.5%, and the zinc content is 31.5-28.5%.

[0026] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0027] The production process of brass alloy carbon steel wire in the present invention solves the defects of the prior art such as surface decarburization of yellow wire, excessive strength, large strength dispersion, uneven steel wire substrate structure, uneven brass alloy thickness, large weight dispersion of plating tank, etc., and solves the trouble of inconvenience of workers' operation while improving production efficiency and product quality. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In order to more clearly illustrate the method provided by the present invention, the following examples are used to describe in detail the various index testing methods of the brass alloy carbon steel wire prepared in the following examples.

[0030] Strength dispersion: Take 9 brass alloy carbon steel wires prepared in the embodiment and the comparative example with the same mass, test the actual breaking force according to GBT8358, calculate the strength of the steel wire according to steel wire strength = actual breaking force / nominal cross-sectional area of ​​the steel wire, and obtain the strength dispersion by subtracting the maximum data of the steel wire strength from the minimum data.

[0031] Example 1

[0032] (1) placing a 0.5 mm thick steel wire in a tubular electric heating furnace with 9 heating zones, each zone being 2 m long and having the same temperature at 900° C.; heating the steel wire for 18 seconds under nitrogen protection to heat it to 900° C. to obtain a heat-treated steel wire;

[0033] (2) The heat-treated steel wire is placed in a primary salt bath quenching tank, quenched for 6 seconds with a mixed salt of potassium carbonate and sodium carbonate at a mass ratio of 85:15 at 580°C, and then placed in a secondary salt bath quenching tank, quenched for 4 seconds with a mixed salt of potassium carbonate and sodium carbonate at a mass ratio of 85:15 at 620°C, to obtain a salt bath quenched steel wire;

[0034] (3) At room temperature, the salt-bath quenched steel wire is placed in a water cooling tank and water-cooled for 2 seconds to obtain a water-cooled steel wire;

[0035] (4) The water-cooled steel wire is placed in a hydrochloric acid tank, pickled with a 15% hydrochloric acid solution at 60° C. for 4 seconds, and then placed in a water washing tank at room temperature for 4 seconds to obtain a steel wire after primary pickling;

[0036] (5) The steel wire after the primary pickling is fed into a single-wire single-control plating tank divided into 18 groups of independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m. A copper pyrophosphate solution with a mass fraction of 2.3%, a coke ratio of 6.5, and a pH of 8 and copper particles are used as the anode, and a flip-type electrode gun is used as the cathode. The rectifier of the single corresponding steel wire is energized. After copper plating at 50.7 A for 19 seconds, the steel wire is placed in a water washing tank at room temperature and washed with water for 4 seconds to obtain a copper-plated steel wire.

[0037] (6) The copper-plated steel wire enters a single-wire single-control plating tank divided into 18 groups of independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m. A zinc sulfate solution with a mass fraction of 17% and copper particles is used as an anode, and a flip-type electrode gun is used as a cathode. The rectifier of the single corresponding steel wire is energized. After galvanizing at 19.6 A for 19 seconds, the wire is placed in a water washing tank at room temperature and washed with water for 4 seconds to obtain the electroplated steel wire.

[0038] (7) The electroplated steel wire is placed in a preheating tank and preheated to 80°C with 90°C water to obtain a preheated steel wire;

[0039] (8) The preheated steel wire was subjected to MF medium frequency diffusion at 530°C for 8 seconds to obtain a heated steel wire;

[0040] (9) The heated steel wire is placed in a phosphoric acid bath, pickled with a 3% phosphoric acid solution at 30° C. for 3 seconds, and then placed in a water washing bath at room temperature for 4 seconds to obtain a steel wire after secondary pickling;

[0041] (10) The steel wire after secondary pickling was placed in a soap immersion tank, immersed in a 10% by mass linolenic acid solution at 90° C. for 2 seconds, dried at 170° C. for 4 seconds, and wound up at 60 m / min to obtain a brass alloy carbon steel wire with a brass alloy coating weight of 11.7 g / kg, a copper content of 68.5%, and a zinc content of 31.5%.

[0042] Example 2

[0043] (1) placing a 0.5 mm thick steel wire in a tubular electric heating furnace with 9 heating zones, each zone being 2 m long and having the same temperature of 925° C.; heating the steel wire for 18 seconds under nitrogen protection to heat it to 925° C. to obtain a heat-treated steel wire;

[0044] (2) The heat-treated steel wire is placed in a primary salt bath quenching tank, quenched for 6 seconds with a mixed salt of potassium carbonate and sodium carbonate at a mass ratio of 77.5:22.5 at 595° C., and then placed in a secondary salt bath quenching tank, quenched for 4 seconds with a mixed salt of potassium carbonate and sodium carbonate at a mass ratio of 77.5:22.5 at 635° C., to obtain a salt bath quenched steel wire;

[0045] (3) At room temperature, the salt-bath quenched steel wire is placed in a water cooling tank and water-cooled for 2 seconds to obtain a water-cooled steel wire;

[0046] (4) The water-cooled steel wire is placed in a hydrochloric acid tank, pickled with a 15% hydrochloric acid solution at 60° C. for 4 seconds, and then placed in a water washing tank at room temperature for 4 seconds to obtain a steel wire after primary pickling;

[0047] (5) The steel wire after the primary pickling is fed into a single-wire single-control plating tank divided into 18 groups of independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m. A copper pyrophosphate solution with a mass fraction of 2.8%, a coke ratio of 7.5, and a pH of 8.4 and copper particles are used as the anode, and a flip-type electrode gun is used as the cathode. The rectifier of the single corresponding steel wire is energized. After copper plating at 52.3 A for 19.5 s, the steel wire is placed in a water washing tank at room temperature and washed with water for 4 s to obtain a copper-plated steel wire.

[0048] (6) The copper-plated steel wire enters a single-wire single-control plating tank divided into 18 groups of independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m. A zinc sulfate solution with a mass fraction of 23% and copper particles is used as an anode, and a flip-type electrode gun is used as a cathode. The rectifier of the single corresponding steel wire is energized. After galvanizing at 20.25 A for 19.5 s, the wire is placed in a water washing tank at room temperature and washed for 4 s to obtain the electroplated steel wire.

[0049] (7) The electroplated steel wire is placed in a preheating tank and preheated to 85°C with 90°C water to obtain a preheated steel wire;

[0050] (8) The preheated steel wire was subjected to MF medium frequency diffusion at 530°C for 8 seconds to obtain a heated steel wire;

[0051] (9) The heated steel wire is placed in a phosphoric acid bath, pickled with a 3% phosphoric acid solution at 30° C. for 3 seconds, and then placed in a water washing bath at room temperature for 4 seconds to obtain a steel wire after secondary pickling;

[0052] (10) The steel wire after secondary pickling is placed in a soap immersion tank, immersed in a 10% by mass linolenic acid solution at 90° C. for 2 seconds, baked at 180° C. for 4 seconds, and wound up at 60 m / min to obtain a brass alloy carbon steel wire with a brass alloy coating weight of 12 g / kg, a copper content of 70%, and a zinc content of 30%.

[0053] Example 3

[0054] (1) placing a 0.5 mm thick steel wire in a tubular electric heating furnace with 9 heating zones, each zone being 2 m long and having the same temperature at 950° C.; heating the steel wire for 18 seconds under nitrogen protection to heat the steel wire to 950° C. to obtain a heat-treated steel wire;

[0055] (2) The heat-treated steel wire is placed in a primary salt bath quenching tank, quenched for 6 seconds with a mixed salt of potassium carbonate and sodium carbonate at a mass ratio of 70:30 at 610°C, and then placed in a secondary salt bath quenching tank, quenched for 4 seconds with a mixed salt of potassium carbonate and sodium carbonate at a mass ratio of 70:30 at 650°C, to obtain a salt bath quenched steel wire;

[0056] (3) At room temperature, the salt-bath quenched steel wire is placed in a water cooling tank and water-cooled for 2 seconds to obtain a water-cooled steel wire;

[0057] (4) The water-cooled steel wire is placed in a hydrochloric acid tank, pickled with a 15% hydrochloric acid solution at 60° C. for 4 seconds, and then placed in a water washing tank at room temperature for 4 seconds to obtain a steel wire after primary pickling;

[0058] (5) The steel wire after the primary pickling is fed into a single-wire single-control plating tank divided into 18 groups of independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m. A copper pyrophosphate solution with a mass fraction of 3.3%, a coke ratio of 8.5, and a pH of 8.8 and copper particles are used as the anode, and a flip-type electrode gun is used as the cathode. The rectifier of the single corresponding steel wire is energized. After copper plating at 53.9 A for 20 seconds, the steel wire is placed in a water washing tank at room temperature and washed with water for 4 seconds to obtain the copper-plated steel wire.

[0059] (6) The copper-plated steel wire enters a single-wire single-control plating tank divided into 18 groups of independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m. A zinc sulfate solution with a mass fraction of 29% and copper particles are used as anodes, and a flip-type electrode gun is used as cathodes. The rectifier of the single corresponding steel wire is energized. After galvanizing at 20.9 A for 20 seconds, the wire is placed in a water washing tank at room temperature and washed with water for 4 seconds to obtain the electroplated steel wire.

[0060] (7) The electroplated steel wire is placed in a preheating tank and preheated to 90° C. with 90° C. water to obtain a preheated steel wire;

[0061] (8) The preheated steel wire was subjected to MF medium frequency diffusion at 530°C for 8 seconds to obtain a heated steel wire;

[0062] (9) The heated steel wire is placed in a phosphoric acid bath, pickled with a 3% phosphoric acid solution at 30° C. for 3 seconds, and then placed in a water washing bath at room temperature for 4 seconds to obtain a steel wire after secondary pickling;

[0063] (10) The steel wire after secondary pickling was placed in a soap immersion tank, immersed in a 10% by mass linolenic acid solution at 90° C. for 2 seconds, dried at 190° C. for 4 seconds, and wound up at 60 m / min to obtain a brass alloy carbon steel wire with a brass alloy coating weight of 12.3 g / kg, a copper content of 71.5%, and a zinc content of 28.5%.

[0064] Comparative Example 1

[0065] (1) placing a 0.5 mm steel wire in a natural gas open flame furnace and heating it to 925° C. to obtain a heat-treated steel wire;

[0066] (2) The heat-treated steel wire is placed in a primary salt bath quenching tank, quenched for 6 seconds with a mixed salt of potassium carbonate and sodium carbonate at a mass ratio of 77.5:22.5 at 595° C., and then placed in a secondary salt bath quenching tank, quenched for 4 seconds with a mixed salt of potassium carbonate and sodium carbonate at a mass ratio of 77.5:22.5 at 635° C., to obtain a salt bath quenched steel wire;

[0067] (3) At room temperature, the salt-bath quenched steel wire is placed in a water cooling tank and water-cooled for 2 seconds to obtain a water-cooled steel wire;

[0068] (4) The water-cooled steel wire is placed in a hydrochloric acid tank, pickled with a 15% hydrochloric acid solution at 60° C. for 4 seconds, and then placed in a water washing tank at room temperature for 4 seconds to obtain a steel wire after primary pickling;

[0069] (5) The steel wire after the primary pickling is fed into a single-wire single-control plating tank divided into 18 groups of independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m. A copper pyrophosphate solution with a mass fraction of 2.8%, a coke ratio of 7.5, and a pH of 8.4 and copper particles are used as the anode, and a flip-type electrode gun is used as the cathode. The rectifier of the single corresponding steel wire is energized. After copper plating at 52.3 A for 19.5 s, the steel wire is placed in a water washing tank at room temperature and washed with water for 4 s to obtain a copper-plated steel wire.

[0070] (6) The copper-plated steel wire enters a single-wire single-control plating tank divided into 18 groups of independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m, with a 23% mass fraction zinc sulfate solution and copper particles as the anode and a flip-type electrode gun as the cathode. After galvanizing at 20.25 A for 19.5 s, the wire is placed in a water washing tank at room temperature and washed with water for 4 s to obtain the electroplated steel wire;

[0071] (7) The electroplated steel wire is placed in a preheating tank and preheated to 85°C with 90°C water to obtain a preheated steel wire;

[0072] (8) The preheated steel wire was subjected to MF medium frequency diffusion at 530°C for 8 seconds to obtain a heated steel wire;

[0073] (9) The heated steel wire is placed in a phosphoric acid bath, pickled with a 3% phosphoric acid solution at 30° C. for 3 seconds, and then placed in a water washing bath at room temperature for 4 seconds to obtain a steel wire after secondary pickling;

[0074] (10) The steel wire after secondary pickling is placed in a soap immersion tank, immersed in a 10% by mass linolenic acid solution at 90° C. for 2 seconds, baked at 180° C. for 4 seconds, and wound up at 60 m / min to obtain a brass alloy carbon steel wire with a brass alloy coating weight of 12 g / kg, a copper content of 70%, and a zinc content of 30%.

[0075] Comparative Example 2

[0076] (1) placing a 0.5 mm thick steel wire in a tubular electric heating furnace with 9 heating zones, each zone being 2 m long and having the same temperature of 925° C.; heating the steel wire for 18 seconds under nitrogen protection to heat it to 925° C. to obtain a heat-treated steel wire;

[0077] (2) The heat-treated steel wire is cooled to 680°C with water and kept in a quenching tank at 625°C for 4 seconds to obtain a water-bath quenched steel wire;

[0078] (3) At room temperature, the water-bath quenched steel wire is placed in a water cooling tank and water-cooled for 2 seconds to obtain a water-cooled steel wire;

[0079] (4) The water-cooled steel wire is placed in a hydrochloric acid tank, pickled with a 15% hydrochloric acid solution at 60° C. for 4 seconds, and then placed in a water washing tank at room temperature for 4 seconds to obtain a steel wire after primary pickling;

[0080] (5) The steel wire after the primary pickling is fed into a single-wire single-control plating tank divided into 18 groups of independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m. A copper pyrophosphate solution with a mass fraction of 2.8%, a coke ratio of 7.5, and a pH of 8.4 and copper particles are used as the anode, and a flip-type electrode gun is used as the cathode. The rectifier of the single corresponding steel wire is energized. After copper plating at 52.3 A for 19.5 s, the steel wire is placed in a water washing tank at room temperature and washed with water for 4 s to obtain a copper-plated steel wire.

[0081] (6) The copper-plated steel wire enters a single-wire single-control plating tank divided into 18 groups of independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m, with a 23% mass fraction zinc sulfate solution and copper particles as the anode and a flip-type electrode gun as the cathode. After galvanizing at 20.25 A for 19.5 s, the wire is placed in a water washing tank at room temperature and washed with water for 4 s to obtain the electroplated steel wire;

[0082] (7) The electroplated steel wire is placed in a preheating tank and preheated to 85°C with 90°C water to obtain a preheated steel wire;

[0083] (8) The preheated steel wire was subjected to MF medium frequency diffusion at 530°C for 8 seconds to obtain a heated steel wire;

[0084] (9) The heated steel wire is placed in a phosphoric acid bath, pickled with a 3% phosphoric acid solution at 30° C. for 3 seconds, and then placed in a water washing bath at room temperature for 4 seconds to obtain a steel wire after secondary pickling;

[0085] (10) The steel wire after secondary pickling is placed in a soap immersion tank, immersed in a 10% by mass linolenic acid solution at 90° C. for 2 seconds, baked at 180° C. for 4 seconds, and wound up at 60 m / min to obtain a brass alloy carbon steel wire with a brass alloy coating weight of 12 g / kg, a copper content of 70%, and a zinc content of 30%.

[0086] Comparative Example 3

[0087] (1) placing a 0.5 mm steel wire in a natural gas open flame furnace and heating it to 925° C. to obtain a heat-treated steel wire;

[0088] (2) The heat-treated steel wire is cooled to 680°C with water and kept in a quenching tank at 625°C for 4 seconds to obtain a water-bath quenched steel wire;

[0089] (3) At room temperature, the water-bath quenched steel wire is placed in a water cooling tank and water-cooled for 2 seconds to obtain a water-cooled steel wire;

[0090] (4) The water-cooled steel wire is placed in a hydrochloric acid tank, pickled with a 15% hydrochloric acid solution at 60° C. for 4 seconds, and then placed in a water washing tank at room temperature for 4 seconds to obtain a steel wire after primary pickling;

[0091] (5) The steel wire after the primary pickling is fed into a centralized control plating tank divided into 18 independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m. A copper pyrophosphate solution with a mass fraction of 2.8%, a coke ratio of 7.5, and a pH of 8.4 and copper particles are used as anodes, and a flip-type electrode gun is used as a cathode. The total rectifier of the 30 steel wires is energized. After copper plating at 1569 A for 19.5 s, the steel wire is placed in a water washing tank at room temperature and washed with water for 4 s to obtain the copper-plated steel wire.

[0092] (6) The copper-plated steel wire enters a centralized plating tank divided into 18 independent tanks at a speed of 70 m / min, with a total length of 1.4 m*18=25.2 m. A zinc sulfate solution with a mass fraction of 23% and copper particles is used as an anode, and a flip-type electrode gun is used as a cathode. The total rectifier of 30 steel wires is energized. After galvanizing at 606A for 19.5 seconds, the steel wire is placed in a water washing tank at room temperature and washed for 4 seconds to obtain the electroplated steel wire.

[0093] (7) The electroplated steel wire is placed in a preheating tank and preheated to 85°C with 90°C water to obtain a preheated steel wire;

[0094] (8) The preheated steel wire was subjected to MF medium frequency diffusion at 530°C for 8 seconds to obtain a heated steel wire;

[0095] (9) The heated steel wire is placed in a phosphoric acid bath, pickled with a 3% phosphoric acid solution at 30° C. for 3 seconds, and then placed in a water washing bath at room temperature for 4 seconds to obtain a steel wire after secondary pickling;

[0096] (10) The steel wire after secondary pickling is placed in a soap immersion tank, immersed in a 10% by mass linolenic acid solution at 90° C. for 2 seconds, baked at 180° C. for 4 seconds, and wound up at 60 m / min to obtain a brass alloy carbon steel wire with a brass alloy coating weight of 12 g / kg, a copper content of 70%, and a zinc content of 30%.

[0097] Effect example

[0098] Table 1 below shows the strength dispersion performance analysis results of brass alloy carbon steel wires of Examples 1 to 3 of the present invention and Comparative Examples 1 to 3.

[0099] Table 1

[0100]

[0101] It can be found from Table 1 that the brass alloy carbon steel wires prepared in Examples 1, 2 and 3 have a smaller strength dispersion; from the comparison of the experimental data of Examples 1, 2 and 3 with Comparative Example 1, it can be found that the brass alloy carbon steel wires prepared using the electric heating process have a smaller strength dispersion; from the comparison of the experimental data of Examples 1, 2 and 3 with Comparative Example 2, it can be found that the brass alloy carbon steel wires prepared using the salt bath quenching process have a smaller strength dispersion; from the comparison of the experimental data of Examples 1, 2 and 3 with Comparative Example 3, it can be found that the brass alloy carbon steel wires prepared using the traditional process have a larger strength dispersion.

[0102] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the equivalent elements of the claims be included in the invention. Any marking in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A production process for brass alloy carbon steel wire, characterized in that: The production process of brass alloy carbon steel wire comprises the following steps: electric heating, salt bath quenching, water cooling, primary pickling, copper plating, galvanizing, hot water preheating, MF medium frequency heat diffusion, secondary pickling, soap soaking and wire taking-up; The production process of the brass alloy carbon steel wire comprises the following steps: (1) placing a 0.5 mm steel wire in a tubular electric heating furnace and heating it for 18 seconds under nitrogen protection conditions to heat the steel wire to 900-950° C. to obtain a heat-treated steel wire; (2) The heat-treated steel wire is placed in a primary salt bath quenching tank, quenched for 6 seconds with a mixed salt at 580-610°C, and then placed in a secondary salt bath quenching tank, quenched for 4 seconds with a mixed salt at 620-650°C, to obtain a salt bath quenched steel wire; (3) At room temperature, the salt-bath quenched steel wire is placed in a water cooling tank and water-cooled for 2 seconds to obtain a water-cooled steel wire; (4) The water-cooled steel wire is placed in a hydrochloric acid tank, pickled with a 15% hydrochloric acid solution at 60° C. for 4 seconds, and then placed in a water washing tank at room temperature for 4 seconds to obtain a steel wire after primary pickling; (5) The steel wire after the primary pickling is fed into a single-wire single-control plating tank at a speed of 70 m / min, with a copper pyrophosphate solution and copper particles as the anode and a flip-type electrode gun as the cathode, and the rectifier of the single corresponding steel wire is energized. After copper plating at 50.7 to 53.9 A for 19 to 20 seconds, the steel wire is placed in a water washing tank at room temperature and washed for 4 seconds to obtain a copper-plated steel wire; (6) The copper-plated steel wire enters a single-wire single-control plating tank at a speed of 70 m / min, with zinc sulfate solution and copper particles as anodes and a flip-type electrode gun as cathodes, and the rectifier of a single corresponding steel wire is energized. After zinc plating at 19.6 to 20.9 A for 19 to 20 seconds, the wire is placed in a water washing tank at room temperature and washed for 4 seconds to obtain the electroplated steel wire; (7) The electroplated steel wire is placed in a preheating tank and preheated to 80-90° C. with 90° C. water to obtain a preheated steel wire; (8) The preheated steel wire was subjected to MF medium frequency diffusion at 530°C for 8 seconds to obtain a heated steel wire; (9) The heated steel wire is placed in a phosphoric acid bath, pickled with a 3% phosphoric acid solution at 30° C. for 3 seconds, and then placed in a water washing bath at room temperature for 4 seconds to obtain a steel wire after secondary pickling; (10) The steel wire after secondary pickling is placed in a soap immersion tank, immersed in a 10% by mass linolenic acid solution at 90° C. for 2 seconds, dried at 170-190° C. for 4 seconds, and then wound at 60 m / min to obtain a brass alloy carbon steel wire.

2. The production process of brass alloy carbon steel wire according to claim 1, characterized in that: The tubular electric heating furnace in step (1) is provided with 9 heating zones, each zone is 2 m long and each zone has the same temperature, which is 900-950°C.

3. The production process of brass alloy carbon steel wire according to claim 1, characterized in that: The mixed salt in step (2) is a mixture of potassium carbonate and sodium carbonate, wherein the mass proportion of sodium carbonate is 15-30%.

4. The production process of brass alloy carbon steel wire according to claim 1, characterized in that: The single-filament single-control plating tank in steps (5) and (6) is divided into 18 groups of independent tank bodies, with a total length of 1.4m*18=25.2m.

5. The production process of brass alloy carbon steel wire according to claim 1, characterized in that: The copper pyrophosphate solution in step (5) has a mass fraction of 2.3-3.3%, a coke ratio of 6.5-8.5, and a pH of 8-8.

8.

6. The production process of brass alloy carbon steel wire according to claim 1, characterized in that: The mass fraction of the zinc sulfate solution in step (6) is 17-29%.

7. The production process of brass alloy carbon steel wire according to claim 1, characterized in that: The brass alloy coating weight of the brass alloy carbon steel wire in step (10) is 11.7-12.3 g / kg, the copper content is 68.5-71.5%, and the zinc content is 31.5-28.5%.

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