Heat treatment nitriding and carburizing process for forging and pressing die

Abstract

The heat treatment nitriding and carburizing process comprises the following steps that S1, a nitrogen pressure reducing valve on a vacuum nitrogen furnace is opened, and the pressure in the furnace is adjusted; s2, setting temperature parameters in the vacuum nitrogen furnace, baking the interior of the furnace, and removing humidity in the furnace; s3, a mold needing to be modulated is put into a vacuum nitrogen furnace, a furnace door is closed, a water pump and a fan are started, and temperature parameters are adjusted; s4, placing for 48 hours after the treatment in the step S3 is finished, adjusting the temperature parameter and closing the nitrogen pressure reducing valve; and S5, naturally cooling the mold for 10 hours after the treatment in the step S4 is completed, so that the whole nitriding process can be completed. The method is simple, the heat treatment nitriding and carburizing process is utilized, the service life of the mold is remarkably prolonged, the basic hardness can be more than three times that of the prior art, the problem that multiple pairs of grinding tools are needed in the large-batch part production process is effectively solved, mold materials are saved, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of forging die processing, and in particular to a forging die heat treatment nitriding and carburizing process. Background Art

[0002] Forging dies are quite common. For example, some factories mainly use gun steel H13 as the material for forging dies. After heat treatment and tempering, the hardness of the die surface can reach a maximum of 45°C. However, during the production process, the die will continue to produce fatigue and wrinkles. A die can only produce about 3,000 parts during the forging process. For mass-produced parts, one set of dies cannot complete all production tasks. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a heat treatment nitriding and carburizing process for forging dies. The method is simple and utilizes the heat treatment nitriding and carburizing process to significantly improve the service life of the die. The basic hardness can reach more than three times that of before. It not only effectively solves the problem of requiring multiple pairs of molds in the production process of large quantities of parts, but also saves mold materials and improves production efficiency.

[0004] In order to solve the above technical problems, the present invention provides 1. a forging die heat treatment nitriding and carburizing process, comprising the following steps: S1: Open the nitrogen pressure reducing valve on the vacuum nitrogen furnace to adjust the pressure in the furnace; S2: Set the temperature parameters in the vacuum nitrogen furnace, bake the furnace, and remove the humidity in the furnace; S3: Place the mold to be modulated into the vacuum nitrogen furnace, close the furnace door, turn on the water pump and fan, and adjust the temperature parameters; S4: After step S3 is completed, place it for 48 hours, adjust the temperature parameters and close the nitrogen pressure reducing valve; S5: After step S4 is completed, the mold is naturally cooled for 10 hours to complete the overall nitriding process.

[0005] Furthermore, the temperature parameter in step S2 is 200 degrees Celsius, and the time for baking and removing humidity in the oven is one hour.

[0006] Furthermore, the temperature parameter in step S3 is 510 degrees Celsius.

[0007] Furthermore, the temperature parameter in step S4 is 560 degrees Celsius.

[0008] Furthermore, in step S3, the water pump is connected to a tap water source.

[0009] Furthermore, in step S1, the pressure in the furnace is adjusted to 0.4 MPa.

[0010] Beneficial effects of the present invention: 1. The present invention adopts a heat treatment nitriding and carburizing process, which significantly increases the service life of the mold, and the basic hardness can reach more than three times the previous one; 2. This method not only effectively solves the problem of needing multiple sets of molds in the production process of large quantities of parts, but also saves mold materials and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0013] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0014] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0015] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0017] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0018] Reference Figure 1 As shown, an embodiment of a forging die heat treatment nitriding and carburizing process of the present invention includes the following steps: S1: opening the nitrogen pressure reducing valve on the vacuum nitrogen furnace and adjusting the pressure in the furnace; S2: setting the temperature parameters in the vacuum nitrogen furnace, baking the furnace and removing the humidity in the furnace; S3: placing the mold to be modulated into the vacuum nitrogen furnace, closing the furnace door, turning on the water pump and the fan and adjusting the temperature parameters; S4: placing the mold for 48 hours after step S3 is completed, adjusting the temperature parameters and closing the nitrogen pressure reducing valve; S5: cooling the mold naturally for 10 hours after step S4 is completed, and the overall nitriding process can be completed.

[0019] The specific parameters are as follows: the temperature parameter in step S2 is 200 degrees Celsius, and the time for baking and removing humidity in the oven is one hour; the temperature parameter in step S3 is 510 degrees Celsius; the temperature parameter in step S4 is 560 degrees Celsius; the water pump in step S3 is connected to the tap water source; the pressure in the oven in step S1 is adjusted to 0.4 MPa.

[0020] After the above process operation, the service life of the mold is significantly improved, and the basic hardness can reach more than three times as high as before. It not only effectively solves the problem of requiring multiple molds in the production process of large quantities of parts, but also saves mold materials and improves production efficiency.

[0021] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A forging die heat treatment nitriding and carburizing process, characterized in that: The steps include: S1: Open the nitrogen pressure reducing valve on the vacuum nitrogen furnace to adjust the pressure in the furnace; S2: Set the temperature parameters in the vacuum nitrogen furnace, bake the furnace, and remove the humidity in the furnace; S3: Place the mold to be modulated into the vacuum nitrogen furnace, close the furnace door, turn on the water pump and fan, and adjust the temperature parameters; S4: After step S3 is completed, place it for 48 hours, adjust the temperature parameters and close the nitrogen pressure reducing valve; S5: After step S4 is completed, the mold is naturally cooled for 10 hours to complete the overall nitriding process.

2. The forging die heat treatment nitriding and carburizing process according to claim 1, characterized in that: The temperature parameter in step S2 is 200 degrees Celsius, and the time for baking and removing humidity in the oven is one hour.

3. The forging die heat treatment nitriding and carburizing process according to claim 1, characterized in that: The temperature parameter in step S3 is 510 degrees Celsius.

4. The forging die heat treatment nitriding and carburizing process according to claim 1, characterized in that: The temperature parameter in step S4 is 560 degrees Celsius.

5. The forging die heat treatment nitriding and carburizing process according to claim 1, characterized in that: In step S3, the water pump is connected to a tap water source.

6. The forging die heat treatment nitriding and carburizing process according to claim 1, characterized in that: In step S1, the pressure in the furnace is adjusted to 0.4 MPa.

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