CN118064700A - Heat treatment method for shield tunneling machine bearing tooth surface - Google Patents

Heat treatment method for shield tunneling machine bearing tooth surface Download PDF

Info

Publication number
CN118064700A
CN118064700A CN202410407118.XA CN202410407118A CN118064700A CN 118064700 A CN118064700 A CN 118064700A CN 202410407118 A CN202410407118 A CN 202410407118A CN 118064700 A CN118064700 A CN 118064700A
Authority
CN
China
Prior art keywords
inductor
quenching
tempering
induction
tooth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202410407118.XA
Other languages
Chinese (zh)
Inventor
麻成标
刘华
田开国
轩书博
王幸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway Construction Heavy Industry Group Co Ltd
Original Assignee
China Railway Construction Heavy Industry Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Railway Construction Heavy Industry Group Co Ltd filed Critical China Railway Construction Heavy Industry Group Co Ltd
Priority to CN202410407118.XA priority Critical patent/CN118064700A/en
Publication of CN118064700A publication Critical patent/CN118064700A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Landscapes

  • Heat Treatment Of Articles (AREA)

Abstract

The application provides a heat treatment method for a shield machine bearing tooth surface, and relates to the technical field of heat treatment. Carrying out induction quenching on any tooth in the shield machine bearing by adopting a quenching inductor; carrying out induction quenching on teeth adjacent to the teeth subjected to induction quenching in the shield machine bearing by adopting a quenching inductor, and carrying out induction tempering on the teeth subjected to induction quenching by adopting a tempering inductor; and repeating the steps until the induction quenching and the induction tempering of all the teeth in the bearing of the shield machine are completed. The heat treatment method reduces the heat treatment time of the shield machine bearing teeth and improves the heat treatment efficiency.

Description

Heat treatment method for shield tunneling machine bearing tooth surface
Technical Field
The application relates to the technical field of heat treatment, in particular to a heat treatment method for a tooth surface of a bearing of a shield machine.
Background
The induction quenching is very mature in the fields of wind power, automobiles and shield machine bearings, and after the induction quenching, a workpiece needs to be tempered in a furnace, and the whole tempering process time can be up to 20 hours.
In order to strengthen the strength of the bearing tooth surface of the shield machine, the tooth surface is subjected to surface quenching treatment, and after the bearing tooth surface of the strong shield machine is subjected to surface quenching, tempering and heat preservation in the furnace are carried out for one hour or more so as to stabilize the structure and the size of the machined surface and eliminate partial residual stress.
However, in the complex structure of tooth surfaces, surface quenching is usually required to be carried out on the tooth surfaces one by one, and then tempering operation is carried out in a furnace, so that the processing period of the tooth surfaces of the bearing of the shield machine is overlong.
Disclosure of Invention
The application provides a heat treatment method for a tooth surface of a bearing of a shield machine, which is used for solving the problem of longer heat treatment period of the tooth surface of a main bearing of the shield machine.
The application provides a heat treatment method of a shield machine bearing tooth surface, which comprises the following steps:
Carrying out induction quenching on any tooth in the shield machine bearing by adopting a quenching inductor;
Carrying out induction quenching on teeth adjacent to the teeth subjected to induction quenching in the shield machine bearing by adopting the quenching inductor, and carrying out induction tempering on the teeth subjected to induction quenching by adopting a tempering inductor;
repeating the steps until the induction quenching and the induction tempering of all teeth in the shield machine bearing are completed.
In some embodiments, after induction hardening any tooth of the shield machine bearing with the hardening inductor, the method further comprises:
cooling the induction quenched teeth by a cooling device;
And carrying out induction quenching on the teeth adjacent to the cooled teeth in the shield machine bearing by adopting the quenching inductor, and simultaneously carrying out induction tempering on the cooled teeth by adopting a tempering inductor.
In some embodiments, the cooling of the induction quenched tooth with a cooling device comprises:
and cooling the teeth after induction quenching by adopting a nitrogen jet cooling device.
In some embodiments, the induction hardening of any tooth in the shield machine bearing with the hardening inductor comprises:
the frequency of the quenching inductor is 6-8 KHz, and the coupling gap between the quenching inductor and the tooth surface of the tooth is smaller than the coupling gap between the quenching inductor and the tooth root of the tooth.
In some embodiments, the induction tempering the induction quenched tooth with a tempering inductor comprises:
The frequency of the tempering inductor is 2-3 KHz, and the coupling gap between the tempering inductor and the tooth surface of the tooth is smaller than the coupling gap between the tempering inductor and the tooth root of the tooth.
In some embodiments, the coupling gap between the quench inductor and the tooth root of the tooth is 3-5 mm and the coupling gap between the quench inductor and the tooth face of the tooth is 2-4 mm.
In some embodiments, the coupling gap between the flashback sensor and the tooth root of the tooth is 4-6 mm, and the coupling gap between the flashback sensor and the tooth surface of the tooth is 3-5 mm.
In some embodiments, the induction hardening of the teeth adjacent to the induction hardened teeth in the shield machine bearing with the hardening inductor, and the induction tempering of the induction hardened teeth with the tempering inductor comprise:
The quenching inductor and the tempering inductor synchronously move so that the quenching inductor is adopted to carry out induction quenching on the teeth adjacent to the teeth after induction quenching in the shield machine bearing, and meanwhile, the tempering inductor is adopted to carry out induction tempering on the teeth after induction quenching, wherein the rising speed of the quenching inductor and the tempering inductor is 250-450 mm/min.
In some embodiments, the heating power of the quenching inductor is 30-50 Kw, and the heating temperature of the quenching inductor is 850-980 ℃.
In some embodiments, the tempering inductor has a heating power of 10-20 Kw and a heating temperature of 150-180 ℃.
The application provides a heat treatment method of a shield machine bearing tooth surface, which carries out induction quenching on any tooth surface of a shield machine bearing by adopting a quenching inductor; then, carrying out induction quenching on adjacent teeth of the teeth after the induction quenching on the bearings by using a quenching inductor, and simultaneously carrying out induction tempering on the teeth after the induction quenching by using a tempering inductor; compared with the traditional in-furnace tempering mode, the tempering treatment is carried out on the tooth surface of the bearing of the shield machine by adopting an induction tempering mode, so that the tempering and heat-preserving time is also reduced; and the induction quenching and the induction tempering are synchronously carried out on different tooth surfaces of the same bearing, so that the time of heat treatment is reduced, and the heat treatment efficiency of the tooth surfaces of the bearing of the shield machine is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic flow chart of a heat treatment method for a shield machine bearing tooth surface according to an embodiment of the present application.
Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
It should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
The induction quenching is very mature in the fields of wind power, automobiles and shield machine bearings, and after the induction quenching, a workpiece needs to be tempered in a furnace, and the whole tempering process time can be up to 20 hours.
In order to strengthen the strength of the bearing tooth surface of the shield machine, the tooth surface is subjected to surface quenching treatment, and after the bearing tooth surface of the strong shield machine is subjected to surface quenching, tempering and heat preservation in the furnace are carried out for one hour or more so as to stabilize the structure and the size of the machined surface and eliminate partial residual stress.
However, in the complex structure of tooth surfaces, surface quenching is usually required to be carried out on the tooth surfaces one by one, and then tempering operation is carried out in a furnace, so that the processing period of the tooth surfaces of the bearing of the shield machine is overlong. Moreover, it has been shown in researches that the hardness value achieved by induction tempering to 230 ℃ and heat preservation for 40s is equivalent to that achieved by tempering and heat preservation for 1h in a furnace at 150 ℃.
In order to solve the problems, the application provides a heat treatment method for a tooth surface of a shield machine bearing, which comprises the steps of carrying out induction quenching on any tooth surface of the shield machine bearing by adopting a quenching inductor; then carrying out induction quenching on adjacent teeth of the teeth after induction quenching, and simultaneously adopting a tempering inductor to carry out induction tempering on the teeth after induction quenching; compared with the traditional in-furnace tempering mode, the tempering treatment is carried out on the tooth surface of the bearing of the shield machine by adopting an induction tempering mode, so that the tempering and heat-preserving time is reduced; and the induction quenching and the induction tempering are synchronously carried out on different tooth surfaces of the same bearing, so that the time of heat treatment is reduced, and the heat treatment efficiency of the tooth surfaces of the bearing of the shield machine is improved.
The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
The application provides a heat treatment method of a shield machine bearing tooth surface, referring to fig. 1, the heat treatment method of the shield machine bearing tooth surface comprises the following steps:
S1, carrying out induction quenching on any tooth in the shield machine bearing by adopting a quenching inductor.
And fixing the shield machine bearing on a tool, adjusting the distance between the quenching sensor and one of the tooth surfaces to be machined of the shield machine bearing, starting the quenching sensor to heat the tooth surface of the shield machine, and carrying out surface induction quenching.
S2, carrying out induction quenching on the teeth adjacent to the teeth subjected to induction quenching in the shield machine bearing by adopting a quenching inductor, and simultaneously carrying out induction tempering on the teeth subjected to induction quenching by adopting a tempering inductor.
After carrying out surface induction quenching on one tooth of the shield machine bearing, moving the shield machine bearing, corresponding the tooth adjacent to the tooth after induction quenching in the shield machine bearing to a quenching sensor, and carrying out surface induction quenching on the tooth; and simultaneously, the tempering inductor is adopted to perform induction tempering on the teeth after induction quenching.
S3, repeating the steps until the induction quenching and the induction tempering of all teeth in the bearing of the shield machine are completed.
Repeating the steps until all teeth of the shield machine bearing are subjected to induction quenching. And the quenching inductor is also required to be closed, and the last tooth is subjected to induction tempering, so that the induction quenching and the induction tempering of the whole shield machine bearing tooth are completed.
By adopting the technical scheme, any tooth surface of the shield machine bearing is subjected to induction quenching by adopting the quenching inductor; then carrying out induction quenching on adjacent teeth of the teeth after induction quenching, and simultaneously adopting a tempering inductor to carry out induction tempering on the teeth after induction quenching; compared with the traditional in-furnace tempering mode, the tempering treatment is carried out on the tooth surface of the bearing of the shield machine by adopting an induction tempering mode, so that the tempering and heat-preserving time is reduced; and the induction quenching and the induction tempering are synchronously carried out on different tooth surfaces of the same bearing, so that the time of heat treatment is reduced, and the heat treatment efficiency of the tooth surfaces of the bearing of the shield machine is improved.
Illustratively, after the shield machine bearings are fixed using the tooling, the corresponding teeth of the quench inductors are adjusted by moving the shield machine bearings.
In other embodiments, after the shield machine bearing is fixed using the tool, the quench inductor and the tempering inductor may be moved synchronously to correspond to different teeth of the shield machine bearing.
Wherein, the quenching inductor and the tempering inductor adopt the same type of inductor. And setting different frequencies and different powers of the quenching inductor and the tempering inductor to reach different temperatures, so as to realize the induction quenching and induction tempering of the teeth of the bearing of the shield machine.
In some embodiments, after induction hardening any tooth in the shield machine bearing with the hardening inductor in step S1, the method further includes:
And cooling the tooth after induction quenching by adopting a cooling device.
And carrying out induction quenching on the teeth adjacent to the cooled teeth in the shield machine bearing by adopting a quenching inductor, and simultaneously carrying out induction tempering on the cooled teeth by adopting a tempering inductor.
The cooling device is assembled on the quenching inductor, after the quenching inductor is used for heating and quenching the teeth of the shield machine bearing, the quenching inductor is closed, the quenched teeth are directly cooled by the cooling device, and after the cooling is completed, the adjacent teeth are subjected to induction quenching. After the teeth of the shield machine bearing are heated and quenched by the quenching inductor, the teeth are directly and rapidly cooled by the cooling device, so that the subsequent induction tempering treatment is facilitated, the shield machine bearing or the quenching inductor does not need to be moved, and the heat treatment effect is further improved.
In some embodiments, cooling the induction quenched teeth with a cooling device includes:
and cooling the teeth after induction quenching by adopting a nitrogen jet cooling device.
The nitrogen jet cooling device is arranged on the quenching sensor, and after the quenching sensor is used for heating and quenching the teeth of the shield machine bearing, the quenching sensor is closed, and the nitrogen jet cooling device is directly used for jetting nitrogen towards the quenched teeth for cooling, so that the quenched teeth are rapidly cooled. And moreover, the cooling by using the nitrogen injection can ensure that the quenching surface is clean after the teeth are machined, so that the subsequent induction tempering is convenient, and the grounding alarm caused by the generation of oxide skin can be prevented.
Table 1 parameters of quench and temper inductors.
In some embodiments, the induction hardening of any tooth in the shield machine bearing with the quench inductor comprises:
The frequency of the quenching inductor is 6-8 KHz, and the coupling gap between the quenching inductor and the tooth surface of the tooth is smaller than the coupling gap between the quenching inductor and the tooth root of the tooth.
In the quenching process, the frequency of the quenching inductor is set to be 6-8 KHz higher, so that the skin effect of the tooth surface corresponding to the quenching inductor is stronger, current is mainly concentrated on the surface of the bearing tooth of the shield machine, the penetration depth of the current is shallower, and the effects of surface heating and surface quenching are achieved.
In addition, in quenching of the shield machine bearing teeth, the depth of the hardened layer of the tooth surface is generally required to be 4-6 mm, and the depth of the hardened layer of the tooth root is generally required to be 3-5 mm. Therefore, the tooth surface is kept to have stronger mechanical property, the strength of the tooth surface is improved, and the premature occurrence of damage of the tooth surface in the long-time use process is avoided, so that the depth of the hardening layer of the tooth surface is set to be larger than that of the tooth root.
The frequency of the quench inductor is set to 7KHz, for example. At this time, according to a current skin depth formula (this is the prior art and will not be described in detail here), the depth of the hardening layer in different coupling gaps between the quenching sensor and the tooth surface can be calculated according to the selected material characteristics, so as to control the coupling gaps between the quenching sensor and the tooth surface and between the quenching sensor and the tooth root, and further realize the control of the depth of the hardening layer of the tooth surface and the tooth root by the same quenching sensor.
In some embodiments, induction tempering the induction quenched tooth with a tempering inductor comprises:
The frequency of the tempering inductor is 2-3 KHz, and the coupling gap between the tempering inductor and the tooth surface of the tooth is smaller than the coupling gap between the tempering inductor and the tooth root of the tooth.
Tempering is a metal heat treatment process in which a quenched workpiece is reheated to a proper temperature lower than a lower critical temperature Ac1 (the starting temperature of pearlite to austenite transformation during heating), and is cooled in air, water, oil or other medium after being kept for a period of time. Or heating the quenched alloy workpiece to a proper temperature, preserving heat for a plurality of times, and then slowly or rapidly cooling. So as to reduce or eliminate the internal stress in the quenched steel piece and obtain the required mechanical properties.
In the conventional heat treatment process of the shield machine bearing teeth, the quenched workpiece is cooled, heated to a certain temperature from a new furnace, kept for a long time, and cooled by air to finish the heat treatment process of the shield machine bearing teeth.
The hardness value obtained by induction tempering to 230 ℃ and heat preservation for 40s is equivalent to that obtained by tempering and heat preservation for 1h at 150 ℃ in a furnace. Therefore, in the application, the induction tempering replaces the conventional in-furnace heat preservation tempering, so that the tempering and heat preservation time in the conventional heat treatment is greatly reduced, and the efficiency of the heat treatment process of the bearing teeth of the shield machine is improved. In addition, the surface induction quenching and the surface induction tempering are both realized by intensively carrying out heat treatment on the tooth surface and the tooth root, so that the pertinence is stronger, and the quenching and tempering parameters are more convenient to adjust, thereby ensuring better quenching and tempering effects.
The frequency of the flashback sensor is set to 2.5KHz, for example. At this time, according to the current skin depth formula and the selected material characteristics, the depth of the hardening layer in different coupling gaps between the tempering inductor and the tooth surface can be calculated, so that the coupling gaps between the tempering inductor and the tooth surface and between the tempering inductor and the tooth root are controlled, and further the control of the depth of the hardening layer of the tooth surface and the tooth root is realized through the same tempering inductor.
And the frequency of the tempering inductor is lower than that of the quenching inductor, and the skin effect is weaker, so that the heating depth of the tempering inductor on the workpiece is larger than that of the quenching inductor, and the quenching layer is completely tempered, so that a good tempering effect is achieved.
In some embodiments, the quenching inductor is used for induction quenching the teeth adjacent to the induction quenched teeth in the shield machine bearing, and the tempering inductor is used for induction tempering the induction quenched teeth, and the method comprises the following steps:
the quenching inductor and the tempering inductor synchronously move so that the quenching inductor carries out induction quenching on the teeth adjacent to the teeth after induction quenching in the shield machine bearing, and meanwhile, the tempering inductor is adopted to carry out induction tempering on the teeth after induction quenching, wherein the rising speed of the quenching inductor and the tempering inductor is 250-450 mm/min.
The quenching sensor and the tempering sensor synchronously move, so that the coupling gap between the quenching sensor and the teeth and the coupling gap between the tempering sensor and the teeth only need to be adjusted at the initial position. In the heat treatment process of other teeth, the tempering inductor can be synchronously driven to move to the corresponding position of the quenched teeth for induction tempering operation only by adjusting the position of the quenching inductor.
Illustratively, the rise speed of the quench and temper sensors is 350mm/min. The induction quenching and the induction tempering are performed simultaneously, and the efficiency of the heat treatment process is improved by maintaining the same rising speed.
In some embodiments, the heating power of the quench inductor is 30-50 Kw and the heating temperature of the quench inductor is 850-980 ℃.
Illustratively, the heating power of the quench inductor is 40Kw and the heating temperature of the quench inductor is 900 ℃. In other embodiments, the heating power and the heating temperature of the quenching sensor can be set to be different according to the material characteristics of the actual workpiece, and excessive description is omitted herein, so long as the surface induction quenching of the shield machine bearing teeth can be achieved.
In some embodiments, the heating power of the tempering inductor is 10-20 Kw and the heating temperature of the tempering inductor is 150-180 ℃.
Illustratively, the heating power of the tempering inductor is 15Kw and the heating temperature of the tempering inductor is 165 ℃. In other embodiments, the heating power and the heating temperature of the tempering sensor can be set according to the material characteristics of the actual workpiece, so that excessive description is omitted, and the surface induction tempering of the bearing teeth of the shield machine can be achieved.
Table 2 quench sensor and gap between the flashback sensor and tooth surface.
In some embodiments, the coupling gap between the quench inductor and the tooth flank of the tooth is 2-4 mm and the coupling gap between the quench inductor and the tooth root of the tooth is 3-5 mm.
Illustratively, the coupling gap between the quench inductor and the tooth flank of the tooth is 3mm and the coupling gap between the quench inductor and the tooth root of the tooth is 4mm. The coupling gap between the quench inductor and the tooth surface of the tooth is smaller than the coupling gap between the quench inductor and the tooth root of the tooth, so that the tooth surface quenching depth of the tooth is larger than the tooth root quenching depth when the same quench inductor is used for quenching the tooth. Thereby reaching the quenching requirement of the teeth.
In some embodiments, the coupling gap between the flashback sensor and the tooth surface of the tooth is 3-5 mm, and the coupling gap between the flashback sensor and the tooth root of the tooth is 4-6 mm.
Illustratively, the coupling gap between the quench inductor and the tooth flank of the tooth is 4mm and the coupling gap between the quench inductor and the tooth root of the tooth is 5mm. The frequency of the tempering inductor is lower than that of the quenching inductor, and the skin effect is weaker, so that the heating depth of the tempering inductor on the workpiece is larger than that of the quenching inductor, and the quenching layer is completely tempered, so that a good tempering effect is achieved.
In other embodiments, the coupling gap between the quenching sensor and the tooth and the coupling gap between the tempering sensor and the tooth may be set according to actual situations, and will not be described in detail herein.
The coupling gap between the tempering inductor and the tooth surface of the tooth is smaller than the coupling gap between the tempering inductor and the tooth root of the tooth, so that when the same tempering inductor is used for tempering the tooth, the tooth surface tempering depth of the tooth is larger than the tempering depth of the tooth root. Thereby meeting the tempering requirement of the teeth.
The application provides a heat treatment method of a shield machine bearing tooth surface, which carries out induction quenching on any tooth surface of a shield machine bearing by adopting a quenching inductor; then, carrying out induction quenching on adjacent teeth of the teeth after the induction quenching on the bearings by using a quenching inductor, and simultaneously carrying out induction tempering on the teeth after the induction quenching by using a tempering inductor; compared with the traditional in-furnace tempering mode, the tempering treatment is carried out on the tooth surface of the bearing of the shield machine by adopting an induction tempering mode, so that the tempering and heat-preserving time is reduced; and the induction quenching and the induction tempering are synchronously carried out on different tooth surfaces of the same bearing, so that the time of heat treatment is further reduced, and the heat treatment efficiency of the tooth surfaces of the bearing of the shield machine is improved. And the heat treatment is carried out by adopting the surface induction quenching and surface induction tempering modes, which is beneficial to the adjustment of corresponding parameters through the quenching inductor and the tempering inductor, thereby improving the heat treatment quality.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. The heat treatment method of the shield tunneling machine bearing tooth surface is characterized by comprising the following steps of:
Carrying out induction quenching on any tooth in the shield machine bearing by adopting a quenching inductor;
Carrying out induction quenching on teeth adjacent to the teeth subjected to induction quenching in the shield machine bearing by adopting the quenching inductor, and carrying out induction tempering on the teeth subjected to induction quenching by adopting a tempering inductor;
repeating the steps until the induction quenching and the induction tempering of all teeth in the shield machine bearing are completed.
2. The method for heat treatment of a shield machine bearing tooth surface according to claim 1, further comprising, after induction hardening any one of the shield machine bearings by using a hardening inductor:
cooling the induction quenched teeth by a cooling device;
And carrying out induction quenching on the teeth adjacent to the cooled teeth in the shield machine bearing by adopting the quenching inductor, and simultaneously carrying out induction tempering on the cooled teeth by adopting a tempering inductor.
3. The method for heat treatment of a shield machine bearing tooth surface according to claim 2, wherein the cooling of the induction quenched tooth by a cooling device comprises:
and cooling the teeth after induction quenching by adopting a nitrogen jet cooling device.
4. The method for heat treatment of a shield machine bearing tooth surface according to claim 1, wherein the induction hardening of any tooth in the shield machine bearing by using the hardening inductor comprises:
the frequency of the quenching inductor is 6-8 KHz, and the coupling gap between the quenching inductor and the tooth surface of the tooth is smaller than the coupling gap between the quenching inductor and the tooth root of the tooth.
5. The method for heat treatment of a shield machine bearing tooth surface according to claim 1, wherein induction tempering the induction quenched tooth with a tempering inductor comprises:
The frequency of the tempering inductor is 2-3 KHz, and the coupling gap between the tempering inductor and the tooth surface of the tooth is smaller than the coupling gap between the tempering inductor and the tooth root of the tooth.
6. The heat treatment method for a shield machine bearing tooth surface according to claim 4, wherein a coupling gap between the quenching sensor and the tooth root of the tooth is 3-5 mm, and a coupling gap between the quenching sensor and the tooth surface of the tooth is 2-4 mm.
7. The heat treatment method for a shield machine bearing tooth surface according to claim 5, wherein a coupling gap between the tempering inductor and the tooth root of the tooth is 4-6 mm, and a coupling gap between the tempering inductor and the tooth surface of the tooth is 3-5 mm.
8. The heat treatment method for a shield machine bearing tooth surface according to any one of claims 1 to 7, wherein the induction hardening of teeth adjacent to the induction hardened teeth in the shield machine bearing using the hardening inductor while induction tempering of the induction hardened teeth using a tempering inductor comprises:
The quenching inductor and the tempering inductor synchronously move so that the quenching inductor is adopted to carry out induction quenching on the teeth adjacent to the teeth after induction quenching in the shield machine bearing, and meanwhile, the tempering inductor is adopted to carry out induction tempering on the teeth after induction quenching, wherein the rising speed of the quenching inductor and the tempering inductor is 250-450 mm/min.
9. The heat treatment method for a shield machine bearing tooth surface according to any one of claims 1 to 7, wherein the heating power of the quenching inductor is 30 to 50Kw, and the heating temperature of the quenching inductor is 850 to 980 ℃.
10. The heat treatment method for a shield machine bearing tooth surface according to any one of claims 1 to 7, wherein the heating power of the tempering inductor is 10 to 20Kw, and the heating temperature of the tempering inductor is 150 to 180 ℃.
CN202410407118.XA 2024-04-03 2024-04-03 Heat treatment method for shield tunneling machine bearing tooth surface Pending CN118064700A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410407118.XA CN118064700A (en) 2024-04-03 2024-04-03 Heat treatment method for shield tunneling machine bearing tooth surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410407118.XA CN118064700A (en) 2024-04-03 2024-04-03 Heat treatment method for shield tunneling machine bearing tooth surface

Publications (1)

Publication Number Publication Date
CN118064700A true CN118064700A (en) 2024-05-24

Family

ID=91107660

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202410407118.XA Pending CN118064700A (en) 2024-04-03 2024-04-03 Heat treatment method for shield tunneling machine bearing tooth surface

Country Status (1)

Country Link
CN (1) CN118064700A (en)

Similar Documents

Publication Publication Date Title
CN102712963B (en) Method for producing hot-rolled high carbon steel sheet
CN109593948A (en) A kind of heat treatment method reducing GCr15 steel bearings lasso grinding deformation
KR20080066751A (en) Method and device for the continuous creation of a bainite structure in a carbon steel, especially a strip steel
CN103290202B (en) Production method for improving yield ratio and bore expansion of 1000MPa-level high-strength steel
CN113564317A (en) Heat treatment method for controlling structure and performance of high-temperature bearing steel
CN108913850A (en) It is easy to the aero-engine blade mounting base produced in batches
CN101538643A (en) Process for quenching H13 steel by high-pressure gas stepped quick cooling
US5672217A (en) Method for producing machine elements of steel
CN118064700A (en) Heat treatment method for shield tunneling machine bearing tooth surface
KR100842710B1 (en) Oil cooling die which has function of preventing heat deformation and manufacturing method for machine parts using the same
CN102560024A (en) Heat treatment method of martensite stainless steel forge piece for nuclear power reactor internals pressure spring
CN101724736A (en) Upper bainite quenching strengthening technology for heat treatment of chromium-manganese-silicon low-alloy structural steel
JP2001020016A (en) Heat treatment method of metallic member
KR100268852B1 (en) The manufacturing method for cold workability wire rod with excellent spheroidizing heat treatment property
CN105803161A (en) Heat treatment method for steel material
CN112760465A (en) Heat treatment method for 410 stainless steel
CN115261775B (en) Thermal treatment process for thermal insulation quenching after carbonitriding
KR20200102566A (en) The method of carburizing
KR100505730B1 (en) Heat treatment of high strength and high toughness roll shell
CN111944961B (en) Annealing method of variable-thickness automobile plate
CN109439856A (en) It can be improved the heat treatment process of 50CrVA plunger spring fatigue strength
KR102560881B1 (en) Local heat treatment method of work roll
JPH0717968B2 (en) Method for manufacturing high carbon thin steel sheet with good formability
CN114790506A (en) Heat treatment process for reducing cracking condition of steel plate
JPS648051B2 (en)

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination