Novel steel piece controllable atmosphere heating system

Abstract

The utility model belongs to the technical field of machining and manufacturing, and discloses a novel steel piece controllable atmosphere heating system which comprises a methanol tank, a propane tank, a methanol conveying system, a propane conveying system, a carbon type control system and a heating system. The methanol tank is communicated with the interior of the heat treatment furnace through the methanol conveying system, the propane tank is communicated with the interior of the heat treatment furnace through the propane conveying system, the carbon type control system is used for monitoring and controlling the carbon concentration change in the heat treatment furnace, and the heating system is used for heating and preserving heat of the heat treatment furnace. The utility model innovatively adopts a methanol and propane controllable atmosphere heating mode, and has the advantages that the carbon type in the heating furnace can be balanced, the surface decarburization of a workpiece is prevented, and the oxide skin on the surface of the workpiece is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing and manufacturing technology, and in particular relates to a novel controllable atmosphere heating system for steel parts. Background Technology

[0002] There is currently a steel part that cannot be heated with a controlled atmosphere during quenching. Without a protective atmosphere during the workpiece heating process, this heating method has the following drawbacks:

[0003] 1. The carbon content in the heating furnace cannot be effectively controlled, which easily leads to decarburization on the surface of the workpiece, resulting in substandard surface hardness and failure to meet the specified hardness requirements during quenching.

[0004] 2. The workpiece surface has a large amount of oxide scale.

[0005] 3. Uneven surface hardness of the workpiece.

[0006] 4. The workpiece surface has large deformation, and the flatness and other indicators cannot meet the product requirements. Utility Model Content

[0007] The technical problems to be solved by this utility model are: the carbon content in the heating furnace cannot be effectively controlled, decarburization is easy to occur on the surface of the workpiece, and the surface hardness does not meet the standard; the amount of oxide scale on the surface of the workpiece is large; the hardness of the workpiece surface is uneven after quenching; and the workpiece surface has a large amount of deformation.

[0008] To solve the above-mentioned technical problems, the specific technical solution of this utility model is as follows:

[0009] A novel controllable atmosphere heating system for steel components includes a methanol tank, a propane tank, a methanol delivery system, a propane delivery system, a carbon control system, and a heating system. The methanol tank is connected to the interior of a heat treatment furnace via the methanol delivery system, the propane tank is connected to the interior of the heat treatment furnace via the propane delivery system, the carbon control system is used to monitor and control changes in carbon concentration inside the heat treatment furnace, and the heating system is used to heat and maintain the temperature of the heat treatment furnace.

[0010] The methanol tank and propane tank are located 4 meters above the ground.

[0011] The methanol delivery system is equipped with a flow display.

[0012] The propane delivery system is equipped with a flow display.

[0013] This utility model has the following advantages:

[0014] 1. The innovative method of controlling the atmosphere of methanol and propane heating is adopted. Its advantage is that it can balance the carbon content in the heating furnace, prevent decarburization of the workpiece surface and reduce the oxide scale on the workpiece surface.

[0015] 2. By using a controlled atmosphere heating method to meet the carbon requirements in the furnace, the surface hardness of the workpiece is made more uniform, ensuring that the hardness of the workpiece is uniform and consistent; so that the hardness index of the workpiece meets the specified requirements.

[0016] 3. A controlled atmosphere heating method is adopted to reduce the amount of workpiece surface deformation and ensure that indicators such as flatness meet product requirements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the novel steel component controllable atmosphere heating system of this utility model. Detailed Implementation

[0018] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model is provided below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, this embodiment designs a methanol tank, a propane tank, a methanol conveying system, a propane conveying system, a carbon control system, and a heating system based on the length-to-width ratio and space size characteristics of the steel quenching heating furnace.

[0020] 1. Design of methanol tanks and propane tanks

[0021] The methanol and propane tanks should be located 4 meters above the ground, allowing gravity to create natural pressure for the methanol to enter the mesh belt furnace. There should be a separate storage room with ventilation windows and a combustible gas alarm. A liquid level indicator should be provided for easy monitoring of methanol usage. The equipment should be designed to discharge static electricity to the ground. Each tank should be able to store at least 150 kg of methanol or 150 kg of propane. The methanol and propane tanks should allow natural flow into the methanol and propane pumps, eliminating the need for frequent dredging.

[0022] 2. Design of methanol and propane transportation systems

[0023] The methanol and propane conveying system consists of a methanol pump, a propane pump, methanol and propane conveying pipelines, an inlet pipe, an overflow pipe, a waste liquid discharge pipe, and an outlet pipe; each pipe should be controlled by a corresponding valve; the rigid part of the methanol and propane conveying pipeline is made of steel pipe, and the flexible part is made of anti-static steel wire flexible hose, with bridging treatment at elbows and unions; the inlet pipe has a flow display to facilitate the operator to monitor the amount of methanol and propane conveyed.

[0024] 3. Carbon-based control system

[0025] When the quenching furnace temperature reaches above 800℃, methanol can be supplied, and the carbon potential is adjusted by propane. Protective gas is supplied through the last protective gas pipe until flames are emitted from both the exhaust and inlet. Then, the flow switches of the other protective gases are adjusted to ensure a uniform flow into the furnace. The automatic carbon potential control system is activated to monitor and control the carbon concentration ratio. Once the set temperature and carbon concentration have reached the set value, the processed items can be introduced into the furnace for production.

[0026] 4. Heating system

[0027] (1) Heating operation

[0028] Turn on all cooling water switches to supply cooling water; turn on the main power switch and control power switch; set the temperature control instrument to the desired temperature; start the stirring fan button switch to make it run (clockwise); start the electric heating button switch to start heating; when the temperature reaches 400℃, start the conveyor motor and the conveyor network to start running; before starting the furnace, the discharge port, the drop port and the sealing conversion groove must be well and reliably sealed.

[0029] (2) Setting the heat preservation time

[0030] a. Initial heating and heat preservation procedures after long-term shutdown

[0031]

[0032] b. Insulation procedures for short-term shutdowns (2-5 days)

[0033]

[0034] This embodiment introduces a controllable atmosphere into the workpiece during the quenching process to balance the carbon content in the furnace, preventing decarburization and reducing oxide scale on the workpiece surface. Simultaneously, it ensures more uniform quenching hardness, reduces surface deformation, and achieves the specified quenching hardness.

[0035] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and improvements without departing from the principles of the present invention, and these modifications and improvements should also be considered to fall within the protection scope of the present invention.

Claims

1. A novel controllable atmosphere heating system for steel components, characterized in that, Includes methanol tanks, propane tanks, methanol delivery systems, propane delivery systems, carbon control systems, and heating systems; The methanol tank is connected to the interior of the heat treatment furnace via a methanol delivery system, and the propane tank is connected to the interior of the heat treatment furnace via a propane delivery system. The carbon control system is used to monitor and control the changes in carbon concentration inside the heat treatment furnace, and the heating system is used to heat and maintain the temperature of the heat treatment furnace.

2. The novel controllable atmosphere heating system for steel parts according to claim 1, characterized in that, The methanol and propane tanks are located 4 meters above the ground.

3. The novel controllable atmosphere heating system for steel parts according to claim 1, characterized in that, The methanol delivery system is equipped with a flow display.

4. The novel controllable atmosphere heating system for steel parts according to claim 1, characterized in that, The propane delivery system is equipped with a flow display.

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