CN114293007A - Quenching and tempering method for shaft parts - Google Patents
Quenching and tempering method for shaft parts Download PDFInfo
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- CN114293007A CN114293007A CN202111631940.7A CN202111631940A CN114293007A CN 114293007 A CN114293007 A CN 114293007A CN 202111631940 A CN202111631940 A CN 202111631940A CN 114293007 A CN114293007 A CN 114293007A
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- 238000005496 tempering Methods 0.000 title claims abstract description 109
- 238000010791 quenching Methods 0.000 title claims abstract description 68
- 230000000171 quenching effect Effects 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 54
- 239000010959 steel Substances 0.000 claims abstract description 54
- 238000001816 cooling Methods 0.000 claims abstract description 44
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims description 60
- 239000000463 material Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 238000003672 processing method Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000000137 annealing Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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- 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
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Abstract
The invention relates to a shaft part, in particular to a quenching and tempering method of the shaft part. The shaft parts are prepared by sequentially quenching, primary cooling, tempering, secondary cooling, straightening and blanking steel bars. The processing method can save raw materials, and has high automation degree and low energy consumption.
Description
Technical Field
The invention relates to a shaft part, in particular to a quenching and tempering method for the shaft part, which can greatly improve the utilization rate of raw materials.
Background
At present, the traditional quenching and tempering method for the shaft parts mainly comprises the following steps: firstly, selecting main materials of long round rods. Then, cutting the raw material into short rods with the length corresponding to that of the finished product; then binding a plurality of short rods into a short rod bundle; then, hoisting the short bar bundle into a quenching furnace for annealing; then, after quenching is finished, hoisting the short bar bundle into a water tank for water cooling; then hoisting the water-cooled short bar bundle to a tempering furnace for tempering; then hoisting the short bar bundle in the tempering furnace to the air for cooling; and finally, straightening and polishing the cooled short rod. The processing method is to perform blanking and then thermal refining. However, because the size of the material can be changed in the quenching and tempering process, the length of the short round bar is required to be larger than the length of the finished product in the first blanking mode, the finished product is polished to the length after quenching and tempering, more materials are consumed, and the cost is higher. Moreover, the traditional processing mode needs manual handling work many times, and the manpower that consumes is more, and degree of automation is lower. In addition, the conventional processing method is to perform overall thermal refining on a short rod bundle formed by binding a plurality of short rods, and when the short rods are produced in small batches, the number of the short rods is small, but the quenching furnace and the tempering furnace still need to consume the same energy, so that the energy consumption is high.
Disclosure of Invention
The invention aims to provide a quenching and tempering method for shaft parts, which can save raw materials, has higher automation degree and lower energy consumption.
In order to solve the problems, the following technical scheme is provided:
the method for quenching and tempering the shaft parts is characterized by comprising the following steps of:
first, selecting materials
And selecting the corresponding steel bar as a raw material according to the mechanical property of the finished product for later use.
Second step, quenching
Firstly, a steel bar is placed at the front end of a tempering production line, so that the longitudinal direction of the steel bar is consistent with the conveying direction of the tempering production line; and then, the steel bar advances on the material conveying roller way and passes through a quenching furnace of a hardening and tempering production line to be quenched.
Wherein the temperature of the quenching furnace is 850-920 ℃, the power is 700-760 KW, the frequency is 500-1500HZ, and the production efficiency is 2.2-2.5 t/h.
Third, primary cooling
And the steel bar after quenching continues to advance on the quenching and tempering production line and sequentially passes through water cooling equipment of the quenching and tempering production line to be cooled.
The fourth step, tempering
After primary cooling, the steel bar continues to advance on the tempering production line and passes through a tempering furnace of the tempering production line for tempering;
wherein the temperature of the tempering furnace is 580-700 ℃, the power is 400-460 KW, the frequency is 300-1000HZ, and the production efficiency is 2.2-2.5 t/h.
The fifth step, secondary cooling
And (4) carrying out secondary cooling on the tempered steel bar to finish the quenching and tempering treatment.
Sixth, blanking
And cutting the tempered steel bar into required length by using a blanking tool to obtain the required shaft part blank.
Wherein, the tempering production line is a dual-frequency induction tempering line.
The primary cooling water cooling mode is spray cooling, and the water cooling equipment comprises a quenching water tank and an open cooling tower which are sequentially arranged from front to back.
The blanking tool is a circular saw.
The secondary cooling process comprises the following steps: and the tempered steel bar is input to a material collecting rack for air cooling by a tempering production line.
The secondary cooling process comprises the following steps: the tempered steel bar continues to advance on the tempering production line and sequentially passes through spraying equipment of the tempering production line to be tempered and sprayed.
By adopting the scheme, the method has the following advantages:
according to the quenching and tempering method for the shaft parts, the shaft parts are prepared by sequentially quenching, primary cooling, tempering, secondary cooling, straightening and blanking steel bars. The processing method comprises the steps of firstly carrying out quenching and tempering on raw materials and then blanking to obtain a finished product. Therefore, during blanking, enough length does not need to be reserved to prevent deformation caused by tempering, the blanked product is a finished product, and the polishing step is avoided, so that the consumption of materials is greatly reduced, and the cost is saved. Moreover, the whole tempering process is continuously and automatically carried out on a tempering production line, manual control and lifting are not needed for many times, the labor consumption is greatly reduced, and the automation degree is higher. In addition, the processing mode is to carry out continuous quenching and tempering work on the steel bars, the energy consumed by the work of the annealing furnace and the tempering furnace is in direct proportion to the number of the steel bars, and the steel bars are less and the energy consumed is less during small-batch production.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example one
The method for producing the shaft part blank with general performance by adopting the quenching and tempering method of the shaft part comprises the following steps:
first, selecting materials
And selecting the corresponding steel bar as a raw material according to the mechanical property of the finished product for later use.
Second step, quenching
Firstly, a steel bar is placed on the front end of a double-frequency induction tempering line, so that the longitudinal direction of the steel bar is consistent with the conveying direction of a tempering production line; and then, the steel bar advances on the material conveying roller way and passes through a quenching furnace of a hardening and tempering production line to be quenched.
Wherein the temperature of the quenching furnace is 850 ℃, the power is 700KW, the frequency is 500HZ, and the production efficiency is 2.2 t/h.
Third, primary cooling
And the steel bar after quenching continuously advances on the quenching and tempering production line and sequentially passes through a quenching water tank and an open cooling tower of the quenching and tempering production line to be quenched and sprayed.
The fourth step, tempering
After primary cooling, the steel bar continues to advance on the tempering production line and passes through a tempering furnace of the tempering production line for tempering;
wherein the temperature of the tempering furnace is 580 ℃, the power is 400KW, the frequency is 300HZ, and the production efficiency is 2.2 t/h.
The fifth step, secondary cooling
And the tempered steel bar is input to a material collecting rack for air cooling by a tempering production line.
Sixth, blanking
And cutting the tempered steel bar into required length by using a circular saw to obtain the required shaft part blank.
Example two
The method for producing the shaft part blank with general performance by adopting the quenching and tempering method of the shaft part comprises the following steps:
first, selecting materials
And selecting the corresponding steel bar as a raw material according to the mechanical property of the finished product for later use.
Second step, quenching
Firstly, a steel bar is placed on the front end of a double-frequency induction tempering line, so that the longitudinal direction of the steel bar is consistent with the conveying direction of a tempering production line; and then, the steel bar advances on the material conveying roller way and passes through a quenching furnace of a hardening and tempering production line to be quenched.
Wherein the temperature of the quenching furnace is 920 ℃, the power is 760KW, the frequency is 1500HZ, and the production efficiency is 2.5 t/h.
Third, primary cooling
And the steel bar after quenching continuously advances on the quenching and tempering production line and sequentially passes through a quenching water tank and an open cooling tower of the quenching and tempering production line to be quenched and sprayed.
The fourth step, tempering
After primary cooling, the steel bar continues to advance on the tempering production line and passes through a tempering furnace of the tempering production line for tempering;
wherein the temperature of the tempering furnace is 700 ℃, the power is 460KW, the frequency is 1000HZ, and the production efficiency is 2.5 t/h.
The fifth step, secondary cooling
And the tempered steel bar is input to a material collecting rack for air cooling by a tempering production line.
Sixth, blanking
And cutting the tempered steel bar into required length by using a circular saw to obtain the required shaft part blank.
EXAMPLE III
The method for producing the high-performance shaft part blank by adopting the quenching and tempering method of the shaft part comprises the following steps:
first, selecting materials
And selecting the corresponding steel bar as a raw material according to the mechanical property of the finished product for later use.
Second step, quenching
Firstly, a steel bar is placed on the front end of a double-frequency induction tempering line, so that the longitudinal direction of the steel bar is consistent with the conveying direction of a tempering production line; and then, the steel bar advances on the material conveying roller way and passes through a quenching furnace of a hardening and tempering production line to be quenched.
Wherein the temperature of the quenching furnace is 900 ℃, the power is 740KW, the frequency is 1200HZ, and the production efficiency is 2.4 t/h.
Third, primary cooling
And the steel bar after quenching continuously advances on the quenching and tempering production line and sequentially passes through a quenching water tank and an open cooling tower of the quenching and tempering production line to be quenched and sprayed.
The fourth step, tempering
After primary cooling, the steel bar continues to advance on the tempering production line and passes through a tempering furnace of the tempering production line for tempering;
wherein the temperature of the tempering furnace is 650 ℃, the power is 450KW, the frequency is 800HZ, and the production efficiency is 2.4 t/h.
The fifth step, secondary cooling
The tempered steel bar continues to advance on the tempering production line and sequentially passes through spraying equipment of the tempering production line to be tempered and sprayed.
Sixth, blanking
And cutting the tempered steel bar into required length by using a circular saw to obtain the required shaft part blank.
According to the quenching and tempering method for the shaft parts, raw materials are quenched and tempered and then are blanked to obtain finished products. Therefore, during blanking, enough length does not need to be reserved to prevent deformation caused by tempering, the blanked product is a finished product, and the polishing step is avoided, so that the consumption of materials is greatly reduced, and the cost is saved. Moreover, the whole tempering process is continuously and automatically carried out on a tempering production line, manual control and lifting are not needed for many times, the labor consumption is greatly reduced, and the automation degree is higher. In addition, the processing mode is to carry out continuous quenching and tempering work on the steel bars, the energy consumed by the work of the annealing furnace and the tempering furnace is in direct proportion to the number of the steel bars, and the steel bars are less and the energy consumed is less during small-batch production. And the quenching and tempering production line adopts an online feeding and discharging conveying roller way to convey the steel bar, and the steel bar can be straightened in the conveying process, so that the straightening step is omitted.
Claims (6)
1. A quenching and tempering method for shaft parts is characterized by comprising the following steps:
first, selecting materials
Selecting a corresponding steel bar as a raw material according to the mechanical property of a finished product for later use;
second step, quenching
Firstly, a steel bar is placed at the front end of a tempering production line, so that the longitudinal direction of the steel bar is consistent with the conveying direction of the tempering production line; then, the steel bar advances on a material conveying roller way, passes through a quenching furnace of a hardening and tempering production line, and is quenched;
wherein the temperature of the quenching furnace is 850-920 ℃, the power is 700-760 KW, the frequency is 500-1500HZ, and the production efficiency is 2.2-2.5 t/h;
third, primary cooling
After quenching, the steel bar continues to advance on the quenching and tempering production line and sequentially passes through water cooling equipment of the quenching and tempering production line to be cooled;
the fourth step, tempering
After primary cooling, the steel bar continues to advance on the tempering production line and passes through a tempering furnace of the tempering production line for tempering;
wherein the temperature of the tempering furnace is 580-700 ℃, the power is 400-460 KW, the frequency is 300-1000HZ, and the production efficiency is 2.2-2.5 t/h;
the fifth step, secondary cooling
Carrying out secondary cooling on the tempered steel bar to finish quenching and tempering;
sixth, blanking
And cutting the tempered steel bar into required length by using a blanking tool to obtain the required shaft part blank.
2. The method for quenching and tempering shaft parts according to claim 1, wherein the quenching and tempering production line is a dual-frequency induction quenching and tempering line.
3. The method for quenching and tempering shaft parts according to claim 1, wherein the primary cooling is performed by spray cooling, and the water cooling equipment comprises a quenching water tank and an open cooling tower which are sequentially arranged in front and back.
4. The method for quenching and tempering of shaft parts according to any of claims 1 to 3, wherein said blanking tool is a circular saw.
5. The method for quenching and tempering shaft parts according to claim 4, wherein the secondary cooling comprises the following steps: and the tempered steel bar is input to a material collecting rack for air cooling by a tempering production line.
6. The method for quenching and tempering shaft parts according to claim 4, wherein the secondary cooling comprises the following steps: the tempered steel bar continues to advance on the tempering production line and sequentially passes through spraying equipment of the tempering production line to be tempered and sprayed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111631940.7A CN114293007A (en) | 2021-12-30 | 2021-12-30 | Quenching and tempering method for shaft parts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111631940.7A CN114293007A (en) | 2021-12-30 | 2021-12-30 | Quenching and tempering method for shaft parts |
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| CN114293007A true CN114293007A (en) | 2022-04-08 |
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| CN202111631940.7A Pending CN114293007A (en) | 2021-12-30 | 2021-12-30 | Quenching and tempering method for shaft parts |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080264529A1 (en) * | 2007-04-27 | 2008-10-30 | Chun Young Park | Apparatus and Method for Continuously Processing Long Bar by Heat Treatment Using Induction Heating |
| CN102699149A (en) * | 2012-06-19 | 2012-10-03 | 河南兴华机械制造有限公司 | Method for straightening shaft piece deformed after heat treatment |
| CN104513885A (en) * | 2014-12-26 | 2015-04-15 | 天津阿瑞斯工业炉有限公司 | Continuous quenched-tempered heat treatment production line equipment for hardened and tempered steel medium-small bars or tubular stocks |
-
2021
- 2021-12-30 CN CN202111631940.7A patent/CN114293007A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080264529A1 (en) * | 2007-04-27 | 2008-10-30 | Chun Young Park | Apparatus and Method for Continuously Processing Long Bar by Heat Treatment Using Induction Heating |
| CN102699149A (en) * | 2012-06-19 | 2012-10-03 | 河南兴华机械制造有限公司 | Method for straightening shaft piece deformed after heat treatment |
| CN104513885A (en) * | 2014-12-26 | 2015-04-15 | 天津阿瑞斯工业炉有限公司 | Continuous quenched-tempered heat treatment production line equipment for hardened and tempered steel medium-small bars or tubular stocks |
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Application publication date: 20220408 |
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