CN111910057A - Heat treatment processing system and method for high-carbon chromium bearing steel hydraulic torque converter - Google Patents
Heat treatment processing system and method for high-carbon chromium bearing steel hydraulic torque converter Download PDFInfo
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- CN111910057A CN111910057A CN202010942329.5A CN202010942329A CN111910057A CN 111910057 A CN111910057 A CN 111910057A CN 202010942329 A CN202010942329 A CN 202010942329A CN 111910057 A CN111910057 A CN 111910057A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C—CHEMISTRY; METALLURGY
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- C21D11/00—Process control or regulation for heat treatments
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
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- C23C8/22—Carburising of ferrous surfaces
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Abstract
The invention relates to the technical field of heat treatment, in particular to a heat treatment processing system and method for a high-carbon chromium bearing steel hydraulic torque converter. The method comprises a quenching and tempering step and a quenching and tempering step which are respectively arranged before and after the spline drawing step; the quenching and tempering step adopts a continuous mesh belt furnace to carry out quenching and tempering on the rough turning piece, and comprises the steps of charging, heating and heat preservation, quenching, cleaning, tempering and discharging; the quenching and tempering steps are produced by adopting a salt bath rod furnace and comprise charging, cleaning and drying, heating and heat preservation, quenching, air cooling, cleaning, tempering, go-no go gauge detection and discharging. The high-carbon chromium bearing steel is adopted for production, the thermal treatment process is quenching and tempering, the production efficiency is effectively improved, the working cost of the thermal treatment is reduced, and meanwhile, the once qualified rate of the spline go-no go gauge of the hydraulic torque converter can be effectively improved, the structure is refined, the grain size is improved, and the service life of the product is prolonged.
Description
Technical Field
The invention relates to the technical field of heat treatment, in particular to a heat treatment processing system and method for a high-carbon chromium bearing steel hydraulic torque converter.
Background
The existing hydraulic torque converter is produced by low-carbon alloy steel and is subjected to carburizing treatment in the production process, but when the hydraulic torque converter is produced by carburizing the low-carbon alloy steel, the hardness of the product is insufficient due to the limitation of raw materials and the carburizing process, the product is easy to crack during broaching, and the product is not suitable for mass production, not to mention under the production requirement of high-precision requirement on the hydraulic torque converter. If a product with composite requirements is obtained by the existing process, multiple times of processing are needed, but the construction period is prolonged, and the production efficiency is reduced. Therefore, a process suitable for mass production and capable of high-quality output under the condition of meeting the requirements of higher hardness and high precision is needed.
Disclosure of Invention
The invention aims to provide a heat treatment processing system and a heat treatment processing method for a high-carbon chromium bearing steel hydraulic torque converter, which are used for solving the problems in the prior art.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
a heat treatment processing system for a high-carbon chromium bearing steel hydraulic torque converter comprises a mesh belt furnace and a rod furnace which are sequentially arranged in front and back, wherein the mesh belt furnace comprises a quenching and tempering feeding platform, a quenching and tempering heating furnace, quenching equipment, a quenching and tempering cleaning machine and a quenching and tempering furnace; the stick furnace comprises a quenching and tempering feeding platform, a front cleaning machine, a quenching and tempering heating furnace, a salt tank, an air cooling platform, a rear cleaning machine, a quenching and tempering furnace and a discharging platform;
the tempering heating furnace, the post-quenching heating furnace, the tempering furnace and the quenching tempering furnace are all provided with electric heating and protective atmosphere devices, control conditions such as temperature, time, carbon potential and the like are automatically monitored through sensors, and the protective atmosphere devices adopt RX gas and propane as enriched gas to carry out carbon potential control.
A heat treatment processing method for a high-carbon chromium bearing steel hydraulic torque converter comprises a quenching and tempering step and a quenching and tempering step which are respectively arranged before and after a spline drawing step;
the quenching and tempering step adopts a continuous mesh belt furnace to carry out quenching and tempering on the rough turning piece, and comprises the steps of charging, heating and heat preservation, quenching, cleaning, tempering and discharging;
the quenching and tempering steps are produced by adopting a salt bath rod furnace and comprise charging, cleaning and drying, heating and heat preservation, quenching, air cooling, cleaning, tempering, go-no go gauge detection and discharging.
The invention has the beneficial effects that:
the high-carbon chromium bearing steel is adopted for production, the thermal treatment process is quenching and tempering, the production efficiency is effectively improved, the working cost of the thermal treatment is reduced, and meanwhile, the once qualified rate of the spline go-no go gauge of the hydraulic torque converter can be effectively improved, the structure is refined, the grain size is improved, and the service life of the product is prolonged.
Preferably, the thermal refining step includes:
a first loading substep, loading the forge piece subjected to rough turning to thermal treatment quenching and tempering equipment;
a first heating and heat preservation substep, wherein austenitizing heating is adopted, the temperature is 820-860 ℃, and the heat preservation time after heating is 30-60 min;
in the first quenching substep, isothermal oil is adopted as quenching oil, and the oil temperature is 70-130 ℃;
a first cleaning substep of cleaning with a cleaning solution;
in the first tempering substep, the high-temperature tempering temperature is 400-600 ℃, and the heat preservation time is 90-150 min;
and a first blanking sub-step, namely, carrying out finish turning on the finished quenched and tempered piece package in the tempering sub-step and delivering the finished and tempered piece package to finish turning equipment in the finish turning step.
Preferably, the first cleaning substep includes two cleaning processes before and after the first cleaning substep.
As a preferable aspect of the present invention, in the first tempering substep: a plurality of heating devices are uniformly arranged in the tempering furnace at intervals from front to back.
Preferably, the step of finish turning is further included before the step of spline broaching, and the step of finish turning is performed on the quenched and tempered piece, so that the size of the quenched and tempered piece is as large as the size of the spline broaching and the tempering.
Preferably, the quenching and tempering step includes:
a second charging substep, charging the broaching piece after the broaching key step is completed to a heat treatment quenching and tempering device;
a second cleaning and drying substep, wherein the garland part is cleaned and dried;
a second heating and heat preservation sub-step, wherein the austenitizing heating temperature in a salt bath rod furnace is 830-860 ℃, and the heat preservation time after heating is 30-60 min;
a second quenching substep, quenching by adopting quenching salt, wherein the salt temperature of the quenching salt is 170-220 ℃;
a second air cooling substep, wherein air cooling is rapidly carried out after quenching;
a second cleaning substep, cleaning the salinization of the quenching piece by adopting a cleaning solution;
a second tempering substep, low-temperature tempering treatment, wherein the tempering temperature is 160-230 ℃, and the heat preservation time is 90-150 min;
a detection substep, detecting the quenching and tempering piece according to the detection requirement;
and a second blanking substep, wherein the quenched and tempered piece package which is qualified in the detection substep is delivered to the equipment in the grinding step for grinding treatment.
Preferably, in the second air cooling substep, the temperature is rapidly reduced to 60-75 ℃.
Preferably, the temperature of the cleaning liquid in the second cleaning substep is 75 to 85 ℃.
Preferably, the second tempering substep comprises one or more than two times of low temperature tempering treatment, wherein the tempering temperature is 170-200 ℃.
Preferably, the method treatment equipment comprises an electric heating and protective atmosphere device, the control conditions such as temperature, time and carbon potential are automatically monitored through sensors, and the protective atmosphere device adopts RX gas and propane as enriched gas to carry out carbon potential control.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a flow chart of the thermal refining step of the present invention;
FIG. 3 is a flow chart of the quenching and tempering step of the present invention;
FIG. 4 is a schematic view of a mesh belt furnace used in the step of conditioning according to the present invention;
FIG. 5 is a schematic view of a rod furnace used in the quenching and tempering step of the present invention;
FIG. 6 is a temperature time process diagram in the thermal refining step of the present invention;
FIG. 7 is a temperature time process diagram in the quenching and tempering step of the present invention.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
example 1
As shown in fig. 4-5, a heat treatment system for a high-carbon chromium bearing steel hydraulic torque converter comprises a mesh belt furnace and a rod furnace which are sequentially arranged in front and back, wherein the mesh belt furnace comprises a quenching and tempering feeding platform 00, a quenching and tempering heating furnace 01, quenching equipment 1, a quenching and tempering cleaning machine 2 and a quenching and tempering furnace 3; the stick furnace comprises a quenching and tempering feeding platform 4, a front cleaning machine 51, a quenching and tempering heating furnace 6, a salt tank 7, an air cooling platform 8, a rear cleaning machine 52, a quenching and tempering furnace 9 and a discharging platform 0;
the quenching and tempering heating furnace 01, the post-quenching heating furnace 6, the quenching and tempering furnace 3 and the quenching and tempering furnace 9 are all provided with electric heating and protective atmosphere devices, control conditions such as temperature, time, carbon potential and the like are automatically monitored through sensors, and the protective atmosphere devices adopt RX gas and propane as enriched gas to carry out carbon potential control.
Example 2
Based on example 1, example 2 is the production method referred to in the system of example 1.
The heat treatment processing method for the high-carbon chromium bearing steel hydraulic torque converter shown in fig. 1-3 comprises a quenching and tempering step and a quenching and tempering step which are respectively arranged before and after the spline drawing step;
the quenching and tempering step adopts a continuous mesh belt furnace to carry out quenching and tempering on the rough turning piece, and comprises the steps of charging, heating and heat preservation, quenching, cleaning, tempering and discharging;
the quenching and tempering steps are produced by adopting a salt bath rod furnace and comprise charging, cleaning and drying, heating and heat preservation, quenching, air cooling, cleaning, tempering, go-no go gauge detection and discharging.
The embodiment adopts the high-carbon chromium bearing steel for production, and the high-carbon chromium bearing steel has the characteristics of high contact fatigue strength, wear resistance and high hardness, so that the high-carbon chromium bearing steel is more suitable to be used as a raw material under the condition of having higher precision requirement on the hydraulic torque converter. The heat treatment process is adopted for the high-carbon chromium bearing steel as the quenching and tempering step and the quenching and tempering step, so that the production efficiency is effectively improved, the working cost of the heat treatment is reduced, the one-time qualification rate of the spline go-no go gauge of the hydraulic torque converter can be effectively improved, the structure is refined, the grain size is improved, and the service life of the product is prolonged.
The whole process flow is as follows: the method comprises the following steps of steel bar forging, rough turning, tempering, finish turning, spline drawing, quenching and tempering, grinding and processing, flaw detection and finished product production.
Forging: and directly forging the steel bar stock to form the hydraulic rheostat profile.
Rough turning: and (4) roughly turning the forging piece, and removing a surface decarburized layer.
Tempering: and (3) quenching and tempering the rough turning piece by adopting a continuous mesh belt furnace, wherein the quenching and tempering hardness meets the use hardness of the broaching key broach.
Finish turning: and (4) carrying out finish turning on the quenched and tempered piece to reach the required sizes of the spline drawing and the quenching and tempering.
Spline pulling: and (5) carrying out spline broaching treatment on the finish turning piece.
Quenching and tempering: the split spline product is produced by adopting a salt bath rod furnace, quick air cooling is adopted after quenching, cleaning liquid is used for cleaning salt stains, tempering is carried out after cleaning, and go-no go gauge detection is carried out according to the hardness requirement and the size requirement of the product.
Grinding: and grinding the hot piece to meet the set technological requirement.
Flaw detection: and carrying out magnetic powder inspection on the fine grinding piece to ensure a crack-free product.
The treatment equipment for implementing the heat treatment method comprises an electric heating and protective atmosphere device, wherein the temperature, time, carbon potential and other control conditions are automatically monitored through a sensor, and the protective atmosphere device adopts RX gas and propane as enriched gases to control the carbon potential.
Fig. 2 and 4 are flow charts and equipment diagrams of the thermal refining step, and fig. 6 is a temperature-time process chart of the thermal refining step. The quenching and tempering step comprises the following steps:
a first loading substep, loading the forge piece subjected to rough turning to thermal treatment quenching and tempering equipment;
a first heating and heat preservation substep, wherein austenitizing heating is adopted, the temperature is 820-860 ℃, and the heat preservation time after heating is 30-60 min;
in the first quenching substep, isothermal oil is adopted as quenching oil, and the oil temperature is 70-130 ℃;
and a first cleaning substep of cleaning with a cleaning solution.
Further, the tempering and cleaning machine 2 in the first cleaning substep includes a first conveying device 21, a second conveying device 22 and a third conveying device 23 which are distributed in three sections, the first conveying device 21 is connected with the quenching device 1 (the quenching device is an oil tank) in the quenching substep, the first quenched part is conveyed to a first liquid washing part 24 for cleaning, after the first cleaning and drying, the first quenched part is conveyed to a second liquid washing part 25 through the second conveying device 22 for cleaning, and after the second cleaning, the first quenched part is conveyed to the tempering and tempering furnace 3 through the third conveying device 23.
In the first tempering substep, the high-temperature tempering temperature is 400-600 ℃, and the heat preservation time is 90-150 min.
Furthermore, a plurality of heating devices 31 are arranged in the tempering and tempering furnace 3 at regular intervals from front to back. The high-carbon high-chromium steel is tempered at high temperature to form tempered martensite, carbide and a small amount of residual austenite. High temperature tempering can convert residual austenite into M, so-called secondary hardening.
And a first blanking sub-step, namely, carrying out finish turning on the finished quenched and tempered piece package in the tempering sub-step and delivering the finished and tempered piece package to finish turning equipment in the finish turning step.
Fig. 3 and 5 show a flow chart and an equipment chart of the quenching and tempering step, and fig. 7 shows a temperature-time process chart of the quenching and tempering step.
The quenching and tempering treatment step comprises the following steps:
and a second charging substep, charging the broaching piece after the broaching key step is completed to a heat treatment quenching and tempering device.
And a second cleaning and drying substep, wherein the flower parts are cleaned and dried.
In the second heating and heat preservation sub-step, the austenitizing heating temperature in a salt bath rod furnace is 830-860 ℃, and the heat preservation time after heating is 30-60 min.
In the second quenching substep, quenching is carried out by adopting quenching salt, and the salt temperature of the quenching salt is 170-220 ℃.
And the second air cooling sub-step, after quenching, quickly cooling the air to below 80 ℃.
And in the second cleaning substep, cleaning the salt stain of the quenching part by using a cleaning solution, and cleaning the part without adhering water, scrap iron, residual salt and dirt.
The second tempering substep, low temperature tempering treatment, tempering temperature is 160-230 ℃, and the holding time is 90-150 min.
And a detection substep, detecting the quenching and tempering piece according to the detection requirement. In this embodiment, the preferred reference detection method is go-no-go detection.
And a second blanking substep, wherein the quenched and tempered piece package which is qualified in the go-no-go gauge detection substep is shipped to equipment in the grinding step for grinding treatment.
Example 2
Based on embodiment 1, the difference from embodiment 1 is that:
in the tempering step:
in the first heating and heat preservation substep, austenitizing heating is adopted, the temperature is 820 ℃, and the heat preservation time after heating is 30 min.
In the first quenching substep, isothermal oil is adopted as quenching oil, and the oil temperature is 70 ℃.
In the quenching and tempering treatment step, multi-station air cooling is adopted in the second air cooling sub-step, and the temperature is rapidly reduced to 60 ℃.
The temperature of the cleaning liquid in the second cleaning substep is 75-85 ℃.
The second tempering substep comprises one or more than two times of low-temperature tempering treatment, and the tempering temperature is 170-200 ℃.
Example 3
Based on embodiment 1, the difference from embodiment 1 is that:
in the tempering step:
in the first heating and heat preservation substep, austenitizing heating is adopted, the temperature is 840 ℃, and the heat preservation time after heating is 45 min.
In the first quenching substep, isothermal oil is adopted as quenching oil, and the oil temperature is 100 ℃.
In the quenching and tempering treatment step, multi-station air cooling is adopted in the second air cooling sub-step, and the temperature is rapidly cooled to 65 ℃.
The temperature of the cleaning liquid in the second cleaning substep is 80 ℃.
The second tempering substep comprises one or more than two times of low temperature tempering treatment, and the tempering temperature is 170 ℃.
Example 4
Based on embodiment 1, the difference from embodiment 1 is that:
in the tempering step:
in the first heating and heat preservation substep, austenitizing heating is adopted, the temperature is 860 ℃, and the heat preservation time after heating is 45 min.
In the first quenching substep, isothermal oil is adopted as quenching oil, and the oil temperature is 130 ℃.
In the quenching and tempering treatment step, multi-station air cooling is adopted in the second air cooling sub-step, and the temperature is rapidly cooled to 130 ℃.
The temperature of the cleaning liquid in the second cleaning substep is 80 ℃.
The second tempering substep comprises one or more than two times of low temperature tempering treatment, and the tempering temperature is 200 ℃.
The above embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention fall into the protection scope of the present invention, and the technical contents of the present invention which are claimed are all described in the claims.
Claims (10)
1. A heat treatment processing system of a high-carbon chromium bearing steel hydraulic torque converter is characterized by comprising a mesh belt furnace and a rod furnace which are sequentially arranged in front and back, wherein the mesh belt furnace comprises a quenching and tempering feeding platform, a quenching and tempering heating furnace, quenching equipment, a quenching and tempering cleaning machine and a quenching and tempering furnace; the stick furnace comprises a quenching and tempering feeding platform, a front cleaning machine, a quenching and tempering heating furnace, a salt tank, an air cooling platform, a rear cleaning machine, a quenching and tempering furnace and a discharging platform; a is
The tempering heating furnace, the post-quenching heating furnace, the tempering furnace and the quenching tempering furnace are all provided with electric heating and protective atmosphere devices, control conditions such as temperature, time, carbon potential and the like are automatically monitored through sensors, and the protective atmosphere devices adopt RX gas and propane as enriched gas to carry out carbon potential control.
2. A heat treatment processing method of a high-carbon chromium bearing steel hydraulic torque converter is applied to the heat treatment processing system of claim 1, and is characterized by comprising a quenching and tempering step and a quenching and tempering step which are respectively arranged before and after the spline drawing step;
the quenching and tempering step adopts a continuous mesh belt furnace to carry out quenching and tempering on the rough turning piece, and comprises the steps of charging, heating and heat preservation, quenching, cleaning, tempering and discharging;
the quenching and tempering steps are produced by adopting a salt bath rod furnace and comprise charging, cleaning and drying, heating and heat preservation, quenching, cleaning, tempering, detecting and discharging.
3. The heat treatment processing method for the high-carbon chromium bearing steel hydraulic torque converter according to claim 1, characterized in that the quenching and tempering step comprises the following steps:
a first loading substep, loading the forge piece subjected to rough turning to thermal treatment quenching and tempering equipment;
a first heating and heat preservation substep, wherein austenitizing heating is adopted, the temperature is 820-860 ℃, and the heat preservation time after heating is 30-60 min;
in the first quenching substep, isothermal oil is adopted as quenching oil, and the oil temperature is 70-130 ℃;
a first cleaning substep of cleaning with a cleaning solution;
in the first tempering substep, the high-temperature tempering temperature is 400-600 ℃, and the heat preservation time is 90-150 min;
and a first blanking sub-step, namely, carrying out finish turning on the finished quenched and tempered piece package in the tempering sub-step and delivering the finished and tempered piece package to finish turning equipment in the finish turning step.
4. The heat treatment processing method for the high-carbon chromium bearing steel torque converter as recited in claim 2, wherein the first cleaning substep comprises two cleaning processes before and after the first cleaning substep.
5. The heat treatment processing method for the high-carbon chromium bearing steel hydraulic torque converter according to claim 2, characterized in that in the first tempering substep: a plurality of heating devices are uniformly arranged in the tempering furnace at intervals from front to back.
6. The heat treatment processing method for the high-carbon chromium bearing steel hydraulic torque converter as claimed in claim 1, characterized by further comprising the step of finish turning before the step of spline drawing, wherein the step of finish turning is to finish turn the quenched and tempered piece to the size requirements of spline drawing and tempering.
7. The heat treatment processing method for the high-carbon chromium bearing steel hydraulic torque converter as claimed in claim 1 or 5, wherein the quenching and tempering treatment step comprises the following steps:
a second charging substep, charging the spline after the spline step is finished to a heat treatment quenching and tempering device;
a second cleaning and drying substep, wherein the spline is cleaned and dried;
a second heating and heat preservation sub-step, wherein the austenitizing heating temperature in a salt bath rod furnace is 830-860 ℃, and the heat preservation time after heating is 30-60 min;
a second quenching substep, quenching by adopting quenching salt, wherein the salt temperature of the quenching salt is 170-220 ℃;
a second air cooling substep, wherein air cooling is rapidly carried out after quenching; [ T1]
A second cleaning substep, cleaning the salinization of the quenching piece by adopting a cleaning solution;
a second tempering substep, low-temperature tempering treatment, wherein the tempering temperature is 160-230 ℃, and the heat preservation time is 90-150 min;
a detection substep, detecting the quenching and tempering piece according to the detection requirement; [ T2]
And a second blanking substep, wherein the quenched and tempered piece package which is qualified in the detection substep is delivered to the equipment in the grinding step for grinding treatment.
8. The heat treatment processing method for the high-carbon chromium bearing steel hydraulic torque converter as claimed in claim 6, wherein the temperature is rapidly reduced to 60-75 ℃ in the cooling device in the second air cooling substep.
9. The heat treatment processing method for the high-carbon chromium bearing steel hydraulic torque converter as claimed in claim 7, characterized in that the temperature of the cleaning liquid in the second cleaning substep is 75 ℃ to 85 ℃.
10. The heat treatment processing method for the high-carbon chromium bearing steel hydraulic torque converter as claimed in claim 6, wherein the second tempering substep comprises one or more times of low temperature tempering treatment, and the tempering temperature is 170-200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010942329.5A CN111910057A (en) | 2020-09-09 | 2020-09-09 | Heat treatment processing system and method for high-carbon chromium bearing steel hydraulic torque converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010942329.5A CN111910057A (en) | 2020-09-09 | 2020-09-09 | Heat treatment processing system and method for high-carbon chromium bearing steel hydraulic torque converter |
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| Publication Number | Publication Date |
|---|---|
| CN111910057A true CN111910057A (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010942329.5A Withdrawn CN111910057A (en) | 2020-09-09 | 2020-09-09 | Heat treatment processing system and method for high-carbon chromium bearing steel hydraulic torque converter |
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| Country | Link |
|---|---|
| CN (1) | CN111910057A (en) |
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2020
- 2020-09-09 CN CN202010942329.5A patent/CN111910057A/en not_active Withdrawn
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Application publication date: 20201110 |