A heat treatment process for a high-strength and high-toughness radiator housing

Abstract

The present invention discloses a heat treatment process for a high-strength and high-toughness radiator housing, comprising the following steps: A. First, preheat the radiator housing; B. Anneal the preheated radiator housing once; C. Calcine the radiator housing that has been annealed once at a high temperature again; D. Anneal the calcined radiator housing a second time; E. Quench the radiator housing that has been annealed a second time; F. Temper the radiator housing that has been quenched; G. Finally, cool the radiator housing. The heat treatment process adopted by the present invention is simple to operate, can improve the strength and toughness of the radiator housing, is not easily deformed or damaged, and thus improves the service life of the radiator.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment of radiator shells, and particularly to a heat treatment process for high-strength and high-toughness radiator shells. Background Technique

[0002] Heat treatment refers to a metal hot working process in which metal materials are heated, held, and cooled in the solid state to change the chemical composition and structure on the surface or inside of the materials and obtain the required properties.

[0003] At present, heat treatment operations are required during the processing of radiator shells to improve their strength. Existing heat treatment processes generally directly use annealing and quenching treatments, but the existing processes cannot further improve the performance of radiator shells. Therefore, it is necessary to make improvements. Summary of the Invention

[0004] The purpose of the present invention is to provide a heat treatment process for high-strength and high-toughness radiator shells to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A heat treatment process for high-strength and high-toughness radiator shells, including the following steps:

[0006] A. First, preheat the radiator shell;

[0007] B. Anneal the preheated radiator shell once;

[0008] C. Calcinate the radiator shell after the first annealing at a high temperature again;

[0009] D. Anneal the calcined radiator shell a second time;

[0010] E. Quench the radiator shell after the second annealing;

[0011] F. Temper the radiator shell after the quenching treatment;

[0012] G. Finally, cool the radiator shell.

[0013] Preferably, in the heat treatment process for high-strength and high-toughness radiator shells provided by the present application, in step A, the preheating temperature is 120°C - 200°C, and the preheating time is 30 min - 50 min.

[0014] Preferably, in the heat treatment process for high-strength and high-toughness radiator shells provided by the present application, in step B, the first annealing temperature is 800 - 850°C, and the time is 2 h - 3 h.

[0015] Preferably, a heat treatment process for a high-strength and high-toughness radiator housing provided by the present application, wherein the high-temperature calcination temperature in step C is 1100°C - 1200°C, and the time is 5h - 7h.

[0016] Preferably, a heat treatment process for a high-strength and high-toughness radiator housing provided by the present application, wherein the secondary annealing temperature in step D is 600 - 700°C, and the time is 1h - 2h.

[0017] Preferably, a heat treatment process for a high-strength and high-toughness radiator housing provided by the present application, wherein in step E, quenching is carried out by quenching heating at 1180°C - 1190°C, and quenching cooling is step quenching, and the step temperature is 550°C - 600°C.

[0018] Preferably, a heat treatment process for a high-strength and high-toughness radiator housing provided by the present application, wherein the tempering temperature in step F is 560°C - 570°C.

[0019] Preferably, a heat treatment process for a high-strength and high-toughness radiator housing provided by the present application, wherein in step G, liquid cooling or air cooling is used for cooling.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: The heat treatment process adopted by the present invention is simple in operation, can improve the strength and toughness of the radiator housing, is not easily deformed or damaged, and thus improves the service life of the radiator; among them, the present invention adopts secondary annealing, which can reduce the thermal stress of the radiator housing, prevent cracking, and improve the toughness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a flowchart of the heat treatment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Example 1:

[0024] Please refer to Figure 1 , the present invention provides a technical solution: A heat treatment process for a high-strength and high-toughness radiator housing, comprising the following steps:

[0025] A. First, preheat the radiator housing;

[0026] B. Anneal the preheated radiator housing once;

[0027] C. Re-calcine the heat sink housing after the first annealing at high temperature;

[0028] D. Perform a second annealing on the heat sink housing after calcination;

[0029] E. Quench the heat sink housing after the second annealing;

[0030] F. Temper the heat sink housing after quenching;

[0031] G. Finally, cool the heat sink housing.

[0032] In this embodiment, in step A, the preheating temperature is 120 °C and the preheating time is 30 min.

[0033] In this embodiment, in step B, the first annealing temperature is 800 °C and the time is 2 h.

[0034] In this embodiment, in step C, the high-temperature calcination temperature is 1100 °C and the time is 5 h.

[0035] In this embodiment, in step D, the second annealing temperature is 600 °C and the time is 1 h.

[0036] In this embodiment, in step E, quenching is carried out by heating at 1180 °C, and the quenching cooling is step quenching with a step temperature of 550 °C.

[0037] In this embodiment, in step F, the tempering temperature is 560 °C.

[0038] In this embodiment, in step G, liquid cooling is used for cooling.

[0039] Embodiment Two:

[0040] A heat treatment process for a high-strength and high-toughness heat sink housing, comprising the following steps:

[0041] A. First, perform a preheating treatment on the heat sink housing;

[0042] B. Perform a first annealing on the preheated heat sink housing;

[0043] C. Re-calcine the heat sink housing after the first annealing at high temperature;

[0044] D. Perform a second annealing on the heat sink housing after calcination;

[0045] E. Quench the heat sink housing after the second annealing;

[0046] F. Temper the heat sink housing after quenching;

[0047] G. Finally, cool the radiator housing.

[0048] In this embodiment, in step A, the preheating temperature is 200 °C and the preheating time is 50 min.

[0049] In this embodiment, in step B, the first annealing temperature is 850 °C and the time is 3 h.

[0050] In this embodiment, in step C, the high-temperature calcination temperature is 1200 °C and the time is 7 h.

[0051] In this embodiment, in step D, the second annealing temperature is 700 °C and the time is 2 h.

[0052] In this embodiment, in step E, quenching is carried out at 1190 °C, and the quenching cooling is step quenching with a step temperature of 600 °C.

[0053] In this embodiment, in step F, the tempering temperature is 570 °C.

[0054] In this embodiment, in step G, air cooling is used for cooling.

[0055] Embodiment Three:

[0056] A heat treatment process for a high-strength and high-toughness radiator housing, comprising the following steps:

[0057] A. First, perform a preheating treatment on the radiator housing;

[0058] B. Perform a first annealing on the preheated radiator housing;

[0059] C. Calcinate the radiator housing that has undergone the first annealing at a high temperature again;

[0060] D. Perform a second annealing on the calcined radiator housing;

[0061] E. Perform a quenching treatment on the radiator housing that has undergone the second annealing;

[0062] F. Perform a tempering treatment on the radiator housing that has undergone the quenching treatment;

[0063] G. Finally, cool the radiator housing.

[0064] In this embodiment, in step A, the preheating temperature is 140 °C and the preheating time is 35 min.

[0065] In this embodiment, in step B, the first annealing temperature is 810 °C and the time is 2 h.

[0066] In this embodiment, in step C, the high-temperature calcination temperature is 1110 °C and the time is 5 h.

[0067] In this embodiment, in step D, the secondary annealing temperature is 620 °C and the time is 1 h.

[0068] In this embodiment, in step E, quenching is carried out by heating at 1183 °C, and the quenching cooling is step quenching with a step temperature of 570 °C.

[0069] In this embodiment, in step F, the tempering temperature is 562 °C.

[0070] In this embodiment, in step G, liquid cooling is used for cooling.

[0071] Example 4:

[0072] A heat treatment process for a high-strength and high-toughness radiator housing includes the following steps:

[0073] A. First, preheat the radiator housing.

[0074] B. Anneal the preheated radiator housing once.

[0075] C. Calcinate the radiator housing after the first annealing at a high temperature again.

[0076] D. Anneal the calcined radiator housing a second time.

[0077] E. Quench the radiator housing after the second annealing.

[0078] F. Temper the radiator housing after the quenching treatment.

[0079] G. Finally, cool the radiator housing.

[0080] In this embodiment, in step A, the preheating temperature is 180 °C and the preheating time is 45 min.

[0081] In this embodiment, in step B, the first annealing temperature is 845 °C and the time is 3 h.

[0082] In this embodiment, in step C, the high-temperature calcination temperature is 1180 °C and the time is 6.5 h.

[0083] In this embodiment, in step D, the secondary annealing temperature is 680 °C and the time is 2 h.

[0084] In this embodiment, in step E, quenching is carried out by heating at 1188 °C, and the quenching cooling is step quenching with a step temperature of 590 °C.

[0085] In this embodiment, in step F, the tempering temperature is 568 °C.

[0086] In this embodiment, in step G, air cooling is used for cooling.

[0087] Example 5:

[0088] A high-strength and high-toughness heat treatment process for a radiator housing, comprising the following steps:

[0089] A. First, preheat the radiator housing;

[0090] B. Anneal the preheated radiator housing once;

[0091] C. Calcinate the radiator housing after the first annealing at a high temperature again;

[0092] D. Anneal the calcined radiator housing a second time;

[0093] E. Quench the radiator housing after the second annealing;

[0094] F. Temper the radiator housing after the quenching treatment;

[0095] G. Finally, cool the radiator housing.

[0096] In this embodiment, the preheating temperature in step A is 160 °C and the preheating time is 40 min.

[0097] In this embodiment, the temperature for the first annealing in step B is 825 °C and the time is 2.5 h.

[0098] In this embodiment, the high-temperature calcination temperature in step C is 1150 °C and the time is 6 h.

[0099] In this embodiment, the temperature for the second annealing in step D is 650 °C and the time is 1.5 h.

[0100] In this embodiment, for quenching in step E, the quenching heating is carried out at 1185 °C, and the quenching cooling is step quenching with a step temperature of 575 °C.

[0101] In this embodiment, the tempering temperature in step F is 566 °C.

[0102] In this embodiment, for cooling in step G, air cooling is used.

[0103] Experimental example:

[0104] The radiator housing is processed using the processing techniques of the embodiments of the present invention, and then the mechanical properties of the housing are tested. The data obtained are as follows in the table:

[0105] Compressive strength (MPA) Impact strength (MPA) Example 1 58.3 131.4 Example 2 59.6 132.2 Example 3 58.7 133.2 Example 4 59.2 131.8 Example 5 60.7 134.7

[0106] In summary, the heat treatment process adopted by the present invention is simple in operation, can improve the strength and toughness of the radiator housing, is not easily deformed or damaged, and thus improves the service life of the radiator. Among them, the present invention adopts secondary annealing, which can reduce the thermal stress of the radiator housing, prevent cracking, and improve the toughness.

[0107] It should be noted that in this text, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

[0108] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claimed rights.

Claims

1. A heat treatment process for a high-strength and high-toughness radiator housing, characterized in that: It includes the following steps: A. First, preheat the radiator housing; B. Anneal the preheated radiator housing once; C. Calcinate the radiator housing that has been annealed once at a high temperature again; D. Anneal the calcined radiator housing a second time; E. Quench the radiator housing that has been annealed a second time; F. Temper the radiator housing after quenching; G. Finally, cool the radiator housing; In step A, the preheating temperature is 120°C - 200°C, and the preheating time is 30 min - 50 min; In step B, the temperature for the first annealing is 800 - 850°C, and the time is 2 h - 3 h; In step C, the temperature for high-temperature calcination is 1100°C - 1200°C, and the time is 5 h - 7 h; In step D, the temperature for the second annealing is 600 - 700°C, and the time is 1 h - 2 h; In step E, quenching is carried out with quenching heating at 1180°C - 1190°C, and quenching cooling is step quenching, with the step temperature being 550°C - 600°C; In step F, the tempering temperature is 560°C - 570°C; In step G, cooling is carried out by liquid cooling or air cooling.

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