Method for optimizing production process of piano wire

Abstract

This invention discloses an optimization method for the production process of piano wire, comprising the following steps: selecting three groups of high-carbon steel wire rod raw materials, designated as control group steel wire raw material A, control group steel wire raw material B, and control group steel wire raw material C; treating control group steel wire raw material A with a salt bath process; treating control group steel wire raw material B with a salt bath process; treating control group steel wire raw material C with a salt bath process; preparing piano wire from high-carbon steel wire rod A, high-carbon steel wire rod B, and high-carbon steel wire rod C respectively, obtaining piano wire A, piano wire B, and piano wire C; testing piano wire A, piano wire B, and piano wire C to obtain performance data A, performance data B, and performance data C; comparing performance data A, performance data B, and performance data C to obtain performance references for piano wires prepared from raw materials quenched in medium-temperature salt bath, high-temperature salt bath, and low-temperature salt bath; recording and archiving the data for later retrieval.

Description

Technical Field

[0001] This invention relates to steel wire preparation technology and equipment, specifically, to an optimized method for piano wire production process. Background Technology

[0002] The core of the production process for piano wire lies in obtaining a fine microstructure called "sorbite," which is the key to giving the wire high strength and good toughness.

[0003] Currently, lead bath quenching is used to produce high-carbon steel wire rods, the raw material for piano wire. Although lead bath quenching can effectively obtain sorbite structure, its drawbacks are becoming increasingly apparent: Lead is a highly toxic heavy metal. At working temperatures of 450-600℃, it will produce a large amount of lead vapor and lead oxide dust, which seriously pollute the environment and endanger the health of operators. Molten lead is prone to oxidation and slag formation, which may adhere to the surface of the steel wire to form "lead nodules" and damage the subsequent wire drawing dies.

[0004] Therefore, an optimization method for the production process of piano wire is provided to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an optimized method for the production process of piano wire.

[0006] The present invention achieves the above objectives through the following technical solutions: A method for optimizing the production process of piano wire, comprising the following steps: 1) Three groups of high-carbon steel wire rod raw materials were selected and designated as control group steel wire raw material A, control group steel wire raw material B, and control group steel wire raw material C; 2) Control group steel wire raw material A was treated using the control group A salt bath process: 2-1) The control group steel wire raw material A was austenitized in a heating furnace at a temperature controlled at 100-150℃ above Accm for 4-10 minutes; 2-2) The heated control group steel wire raw material A was quickly immersed in a molten salt bath at a temperature 80-120°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 30-120 seconds. 2-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure; 2-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod A; 3) Control group steel wire raw material B was treated using the control group B salt bath process: 3-1) The control group steel wire raw material B was austenitized in a heating furnace at a temperature controlled above Accm (160-180℃) for 3-5 minutes. 3-2) The heated control group steel wire raw material B was quickly immersed in a molten salt bath at a temperature 130-150°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 15-20 seconds. 3-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure. 3-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod B; 4) The control group steel wire raw material C was treated using the salt bath process of control group C: 4-1) The control group steel wire raw material C was austenitized in a heating furnace at a temperature controlled above Accm by 75~95℃ for 20~25 minutes; 4-2) The heated control group steel wire raw material C was quickly immersed in a molten salt bath at a temperature 70-75°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 45-60 seconds. 4-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure; 4-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod C; 5) High-carbon steel wire rod A, high-carbon steel wire rod B, and high-carbon steel wire rod C were respectively used to prepare piano wire, obtaining piano wire A, piano wire B, and piano wire C; 6) Piano wire A, piano wire B, and piano wire C were tested to obtain performance data A, performance data B, and performance data C; 7) Compare performance data A, performance data B, and performance data C to obtain performance references for the piano wires prepared from raw materials obtained by medium-temperature salt bath quenching, high-temperature salt bath quenching, and low-temperature salt bath quenching. 8) Record and archive the data for easy retrieval later.

[0007] Furthermore, the diameter of piano wire A is 150%-200% of that of piano wire B; The diameter of piano wire C is 50%-60% of that of piano wire B; This means that: Piano wire B is the diameter used for commonly used piano wires, piano wire A is a large-diameter special piano wire, and piano wire C is a small-diameter special piano wire.

[0008] Furthermore, the types of piano wires required for production are matched, and the production processes for piano wire A, piano wire B, and piano wire C are incorporated to prepare the corresponding piano wires.

[0009] Furthermore, step 5) includes the detection of surface oxidation, decarburization, and corrosion behavior.

[0010] Furthermore, step 5) also includes testing tensile strength.

[0011] Furthermore, the air quenching process of wire rod can be used to replace the salt bath process in steps 2) to 5).

[0012] Furthermore, a wire rod fluidized bed process can be used to replace the salt bath process in steps 2) to 5).

[0013] Compared with existing technologies, this invention eliminates serious environmental hazards such as lead vapor, lead slag, and lead-containing wastewater, and meets increasingly stringent environmental regulations at home and abroad; through the research and development of process innovation, it promotes the low-carbon and sustainable development of the industry. Detailed Implementation

[0014] Example 1:

[0015] This embodiment demonstrates a method for optimizing the production process of piano wire, the steps of which include: 1) Three groups of high-carbon steel wire rod raw materials were selected and designated as control group steel wire raw material A, control group steel wire raw material B, and control group steel wire raw material C; 2) Control group steel wire raw material A was treated using the control group A salt bath process: 2-1) The control group steel wire raw material A was austenitized in a heating furnace at a temperature controlled above Accm by 100°C for 10 minutes; 2-2) The heated control group steel wire raw material A was quickly immersed in a molten salt bath at a temperature 80°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 120 seconds. 2-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure; 2-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod A; 3) Control group steel wire raw material B was treated using the control group B salt bath process: 3-1) The control group steel wire raw material B was austenitized in a heating furnace at a temperature controlled above Accm (160℃) for 5 minutes; 3-2) The heated control group steel wire raw material B was quickly immersed in a molten salt bath at a temperature 130°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 20 seconds. 3-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure. 3-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod B; 4) The control group steel wire raw material C was treated using the salt bath process of control group C: 4-1) The control group steel wire raw material C was austenitized in a heating furnace at a temperature controlled above Accm by 75°C for 25 minutes; 4-2) The heated control group steel wire raw material C was quickly immersed in a molten salt bath at a temperature 70°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 60 seconds. 4-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure; 4-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod C; 5) High-carbon steel wire rod A, high-carbon steel wire rod B, and high-carbon steel wire rod C were respectively used to prepare piano wire, obtaining piano wire A, piano wire B, and piano wire C; 6) Piano wire A, piano wire B, and piano wire C were tested to obtain performance data A, performance data B, and performance data C; 7) Compare performance data A, performance data B, and performance data C to obtain performance references for the piano wires prepared from raw materials obtained by medium-temperature salt bath quenching, high-temperature salt bath quenching, and low-temperature salt bath quenching. 8) Record and archive the data for easy retrieval later.

[0016] The diameter of piano wire A is 150%-200% of that of piano wire B; The diameter of piano wire C is 50%-60% of that of piano wire B; This means that: Piano wire B is the diameter used for commonly used piano wires, piano wire A is a large-diameter special piano wire, and piano wire C is a small-diameter special piano wire.

[0017] Match the type of piano wire required for production, and input the production processes of piano wire A, piano wire B, and piano wire C to prepare the corresponding piano wires.

[0018] Step 5) includes the detection of surface oxidation, decarburization, and corrosion behavior.

[0019] Step 5) also includes testing tensile strength.

[0020] Example 2:

[0021] This embodiment demonstrates a method for optimizing the production process of piano wire, the steps of which include: 1) Three groups of high-carbon steel wire rod raw materials were selected and designated as control group steel wire raw material A, control group steel wire raw material B, and control group steel wire raw material C; 2) Control group steel wire raw material A was treated using the control group A salt bath process: 2-1) The control group steel wire raw material A was austenitized in a heating furnace at a temperature controlled above Accm by 150°C for 4 minutes; 2-2) The heated control group steel wire raw material A was quickly immersed in a molten salt bath at a temperature 120°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 30 seconds. 2-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure; 2-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod A; 3) Control group steel wire raw material B was treated using the control group B salt bath process: 3-1) The control group steel wire raw material B was austenitized in a heating furnace at a temperature controlled above Accm by 180°C for 3 minutes; 3-2) The heated control group steel wire raw material B was quickly immersed in a molten salt bath at a temperature 150°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 15 seconds. 3-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure. 3-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod B; 4) The control group steel wire raw material C was treated using the salt bath process of control group C: 4-1) The control group steel wire raw material C was austenitized in a heating furnace at a temperature controlled above Accm (95°C) for 20 minutes; 4-2) The heated control group steel wire raw material C was quickly immersed in a molten salt bath at a temperature 75°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 45 seconds. 4-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure; 4-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod C; 5) High-carbon steel wire rod A, high-carbon steel wire rod B, and high-carbon steel wire rod C were respectively used to prepare piano wire, obtaining piano wire A, piano wire B, and piano wire C; 6) Piano wire A, piano wire B, and piano wire C were tested to obtain performance data A, performance data B, and performance data C; 7) Compare performance data A, performance data B, and performance data C to obtain performance references for the piano wires prepared from raw materials obtained by medium-temperature salt bath quenching, high-temperature salt bath quenching, and low-temperature salt bath quenching. 8) Record and archive the data for easy retrieval later.

[0022] The diameter of piano wire A is 150%-200% of that of piano wire B; The diameter of piano wire C is 50%-60% of that of piano wire B; This means that: Piano wire B is the diameter used for commonly used piano wires, piano wire A is a large-diameter special piano wire, and piano wire C is a small-diameter special piano wire.

[0023] Match the type of piano wire required for production, and input the production processes of piano wire A, piano wire B, and piano wire C to prepare the corresponding piano wires.

[0024] Step 5) includes the detection of surface oxidation, decarburization, and corrosion behavior.

[0025] Step 5) also includes testing tensile strength.

[0026] Example 3:

[0027] This embodiment demonstrates a method for optimizing the production process of piano wire, the steps of which include: 1) Three groups of high-carbon steel wire rod raw materials were selected and designated as control group steel wire raw material A, control group steel wire raw material B, and control group steel wire raw material C; 2) Control group steel wire raw material A was treated using the control group A salt bath process: 2-1) The control group steel wire raw material A was austenitized in a heating furnace at a temperature controlled above Accm by 125°C for 7 minutes; 2-2) The heated control group steel wire raw material A was quickly immersed in a molten salt bath at a temperature 100°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 80 seconds. 2-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure; 2-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod A; 3) Control group steel wire raw material B was treated using the control group B salt bath process: 3-1) The control group steel wire raw material B was austenitized in a heating furnace at a temperature controlled above Accm (170°C) for 4 minutes; 3-2) The heated control group steel wire raw material B was quickly immersed in a molten salt bath at a temperature 140°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 18 seconds. 3-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure. 3-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod B; 4) The control group steel wire raw material C was treated using the salt bath process of control group C: 4-1) The control group steel wire raw material C was austenitized in a heating furnace at a temperature controlled above Accm (85°C) for 23 minutes; 4-2) The heated control group steel wire raw material C was quickly immersed in a molten salt bath at a temperature 73°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 53 seconds. 4-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure; 4-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod C; 5) High-carbon steel wire rod A, high-carbon steel wire rod B, and high-carbon steel wire rod C were respectively used to prepare piano wire, obtaining piano wire A, piano wire B, and piano wire C; 6) Piano wire A, piano wire B, and piano wire C were tested to obtain performance data A, performance data B, and performance data C; 7) Compare performance data A, performance data B, and performance data C to obtain performance references for the piano wires prepared from raw materials obtained by medium-temperature salt bath quenching, high-temperature salt bath quenching, and low-temperature salt bath quenching. 8) Record and archive the data for easy retrieval later.

[0028] The diameter of piano wire A is 150%-200% of that of piano wire B; The diameter of piano wire C is 50%-60% of that of piano wire B; This means that: Piano wire B is the diameter used for commonly used piano wires, piano wire A is a large-diameter special piano wire, and piano wire C is a small-diameter special piano wire.

[0029] Match the type of piano wire required for production, and input the production processes of piano wire A, piano wire B, and piano wire C to prepare the corresponding piano wires.

[0030] Step 5) includes the detection of surface oxidation, decarburization, and corrosion behavior.

[0031] Step 5) also includes testing tensile strength.

[0032] in; The salt bath process used in Examples 1-3 can be replaced by air quenching or fluidized bed processes.

[0033] Compared with existing technologies, this invention eliminates serious environmental hazards such as lead vapor, lead slag, and lead-containing wastewater, and meets increasingly stringent environmental regulations at home and abroad; through the research and development of process innovation, it promotes the low-carbon and sustainable development of the industry.

[0034] The above are merely some embodiments of the present invention. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of the present invention, and all such modifications and improvements fall within the scope of protection of the present invention.

Claims

1. A method for optimizing the production process of piano wire, characterized by: steps include: 1) Three groups of high-carbon steel wire rod raw materials were selected and designated as control group steel wire raw material A, control group steel wire raw material B, and control group steel wire raw material C; 2) Control group steel wire raw material A was treated using the control group A salt bath process: 2-1) The control group steel wire raw material A was austenitized in a heating furnace at a temperature controlled at 100-150℃ above Accm for 4-10 minutes; 2-2) The heated control group steel wire raw material A was quickly immersed in a molten salt bath at a temperature 80-120°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 30-120 seconds. 2-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure; 2-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod A; 3) Control group steel wire raw material B was treated using the control group B salt bath process: 3-1) The control group steel wire raw material B was austenitized in a heating furnace at a temperature controlled above Accm (160-180℃) for 3-5 minutes. 3-2) The heated control group steel wire raw material B was quickly immersed in a molten salt bath at a temperature 130-150°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 15-20 seconds. 3-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure. 3-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod B; 4) The control group steel wire raw material C was treated using the salt bath process of control group C: 4-1) The control group steel wire raw material C was austenitized in a heating furnace at a temperature controlled above Accm by 75~95℃ for 20~25 minutes; 4-2) The heated control group steel wire raw material C was quickly immersed in a molten salt bath at a temperature 70-75°C below Ar1. Martensitic structure was obtained through heat exchange, and the quenching time was 45-60 seconds. 4-3) After quenching, the wire rod is naturally air-cooled to room temperature, and then tempered in a molten salt tempering tank to eliminate residual stress and refine the microstructure; 4-4) Use a hot air knife to blow away residual salt and then wash with water to obtain high-carbon steel wire rod C; 5) High-carbon steel wire rod A, high-carbon steel wire rod B, and high-carbon steel wire rod C were respectively used to prepare piano wire, obtaining piano wire A, piano wire B, and piano wire C; 6) Piano wire A, piano wire B, and piano wire C were tested to obtain performance data A, performance data B, and performance data C; 7) Compare performance data A, performance data B, and performance data C to obtain performance references for the piano wires prepared from raw materials obtained by medium-temperature salt bath quenching, high-temperature salt bath quenching, and low-temperature salt bath quenching. 8) Record and archive the data for easy retrieval later.

2. The method for optimizing the production process of piano wire according to claim 1, characterized in that: The diameter of piano wire A is 150%-200% of that of piano wire B; The diameter of piano wire C is 50%-60% of that of piano wire B; This means: Piano wire B is the diameter used for commonly used piano wires, piano wire A is a large-diameter special piano wire, and piano wire C is a small-diameter special piano wire.

3. The method for optimizing the production process of piano wire according to claim 2, characterized in that: Match the type of piano wire required for production, and input the production processes of piano wire A, piano wire B, and piano wire C to prepare the corresponding piano wires.

4. A method for optimizing the production process of piano wire according to any one of claims 1-3, characterized in that: Step 5) includes the detection of surface oxidation, decarburization, and corrosion behavior.

5. The method for optimizing the production process of piano wire according to claim 4, characterized in that: Step 5) also includes testing tensile strength.

6. The method for optimizing the production process of piano wire according to claim 1, characterized in that: The air quenching process of steel wire rod can be used to replace the salt bath process in steps 2)-5).

7. The method for optimizing the production process of piano wire according to claim 1, characterized in that: The wire rod fluidized bed process can be used to replace the salt bath process in steps 2)-5).