CN114606371B - Adjusting device for sample support in steel end quenching test and using method thereof - Google Patents
Adjusting device for sample support in steel end quenching test and using method thereof Download PDFInfo
- Publication number
- CN114606371B CN114606371B CN202210219990.2A CN202210219990A CN114606371B CN 114606371 B CN114606371 B CN 114606371B CN 202210219990 A CN202210219990 A CN 202210219990A CN 114606371 B CN114606371 B CN 114606371B
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- piece
- adjusting device
- steel
- sample support
- fixing piece
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 38
- 239000010959 steel Substances 0.000 title claims abstract description 38
- 238000010791 quenching Methods 0.000 title claims abstract description 21
- 230000000171 quenching effect Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 239000007921 spray Substances 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- C21D1/55—Hardenability tests, e.g. end-quench tests
-
- 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
- C21D1/667—Quenching devices for spray quenching
-
- 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
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides an adjusting device of a sample bracket in a steel end quenching test and a using method thereof, wherein the adjusting device comprises a supporting piece, and the upper end and the lower end of the supporting piece are respectively and independently fixedly connected with 1 fixing piece and an inserting piece; the shape of the supporting piece, the fixing piece and the inserting piece is cylindrical; the center line of the fixing piece and the center line of the inserting piece are on the same straight line. According to the adjusting device provided by the invention, the insert at the lower end of the adjusting device is inserted into the water jet, the fixing piece at the upper end of the adjusting device is used for fixing the sample support, so that the axis of the sample support and the central line of the water jet are ensured to be in the same straight line, errors caused by human factors when the relative position between the sample support and the water jet is adjusted by using the steel plate ruler are overcome, the accuracy is improved, and the adjusting time is shortened.
Description
Technical Field
The invention belongs to the technical field of steel end quenching test devices, and particularly relates to an adjusting device of a sample bracket in a steel end quenching test and a use method thereof.
Background
With the rapid development of engineering machinery industry, steel is taken as a foundation, the industrial status can not be replaced, and the development space is still wide in the future. The hardenability is one of important indexes for representing the quality of steel, and refers to the capacity of austenitized steel to obtain martensite during quenching, and the size of the austenitized steel is expressed by the depth of a quenched layer and the hardness distribution obtained by quenching the steel under certain conditions. The method for measuring the hardenability of the steel is commonly used at present, and is an end quenching method, such as gear steel, cold forging steel and the like, and the method is used for detecting the hardenability of the steel.
Currently, most enterprises perform end quenching tests of steel according to national standard (GBT 225-2006) regulations to detect the hardenability of the steel. The test steps mainly comprise: (1) Heating a cylindrical sample to a certain specified temperature in an austenite region, and preserving heat for a certain time according to the specified temperature; (2) Carrying out water spray quenching on the end face of the steel plate under a specified condition; (3) The hardness is measured at a prescribed position on the longitudinal grinding plane of the sample, and the hardenability is determined according to the hardness value change of the steel. At the same time, the sampling position of the sample is also specified, and the sample support should ensure that the axis of the sample is on the same straight line with the central line of the water jet, and the position is kept unchanged during quenching.
During the end quenching test, the relative position between the sample support and the water spray port and whether the sample is centered above the water spray port directly influence the accuracy of the test result, however, in the test process, the sample support moves downwards or rotates along with frequent contact between the sample and the sample support, the sample support needs to be adjusted, a common adjusting tool is a steel plate ruler, the relative position of the sample support is adjusted, the sample support is neutral through visual adjustment, a certain error exists due to manual observation, and meanwhile, the working efficiency is more general.
Therefore, it is necessary to develop a simple and quick adjusting device, which has great significance and application prospect in improving the accuracy and the working efficiency of adjusting the position of the sample bracket in the end quenching test.
Disclosure of Invention
The invention aims to provide an adjusting device of a sample support in a steel end quenching test and a using method thereof, wherein the adjusting device reduces the adjusting time of a sample support and improves the accuracy.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the invention provides an adjusting device of a sample bracket in a steel end quenching test, which comprises a supporting piece, wherein the upper end and the lower end of the supporting piece are respectively and independently fixedly connected with 1 fixing piece and an inserting piece;
The shape of the supporting piece, the fixing piece and the inserting piece is cylindrical;
The center line of the fixing piece and the center line of the inserting piece are on the same straight line.
The adjusting device is convenient to use, can overcome errors caused by human factors when the relative position between the sample support and the water jet is adjusted by using the steel plate ruler, improves accuracy and shortens the adjusting time of the sample support.
In a preferred embodiment of the present invention, the diameter of the support member is 31 to 33mm, for example, 31mm, 31.2mm, 31.4mm, 31.6mm, 31.8mm, 32mm, 32.2mm, 32.4mm, 32.6mm, 32.8mm or 33mm, etc., but not limited to the values recited, and other values not recited in the numerical range are equally applicable.
The height of the support member is 1060-1070mm, which may be 1060mm, 1061mm, 1062mm, 1063mm, 1064mm, 1065mm, 1066mm, 1067mm, 1068mm, 1069mm or 1070mm, but is not limited to the values recited, and other non-recited values within the range of values are equally applicable.
In a preferred embodiment of the present invention, the diameter of the fixing member is 24-26mm, for example, 24mm, 24.2mm, 24.4mm, 24.6mm, 24.8mm, 25mm, 25.2mm, 25.4mm, 25.6mm, 25.8mm or 26mm, etc., but not limited to the values recited, and other values not recited in the numerical range are equally applicable.
Preferably, the height of the fixing member is 9-11mm, for example, 9mm, 9.2mm, 9.4mm, 9.6mm, 9.8mm, 10mm, 10.2mm, 10.4mm, 10.6mm, 10.8mm or 11mm, etc., but not limited to the recited values, other non-recited values within the range of values are equally applicable.
As a preferred embodiment of the present invention, the diameter of the insert is 12-13mm, for example, 12mm, 12.1mm, 12.2mm, 12.3mm, 12.4mm, 12.5mm, 12.6mm, 12.7mm, 12.8mm, 12.9mm or 13mm, etc., but not limited to the values recited, and other values not recited in the numerical range are equally applicable.
Preferably, the height of the insert is 9-11mm, for example, 9mm, 9.2mm, 9.4mm, 9.6mm, 9.8mm, 10mm, 10.2mm, 10.4mm, 10.6mm, 10.8mm or 11mm, etc., but not limited to the recited values, other non-recited values within the range of values are equally applicable.
As a preferable technical scheme of the invention, the supporting piece, the fixing piece and the inserting piece are all made of steel alloy.
In the present invention, the steel alloy includes carbon structural steel and/or alloy structural steel, such as 20 steel, 35 steel, 45 steel, 40Cr, or the like, but is not limited to the enumerated steel grades.
The invention also provides a use method of the adjusting device, which comprises the following steps: the insert at the lower end of the support member is inserted into the water jet, and the fixing member at the upper end of the support member fixes the sample support, thereby ensuring that the axis of the sample support is on the same straight line with the central line of the water jet.
According to the invention, the adjusting device can more quickly and accurately adjust the centering of the water jet and the sample support.
The numerical ranges recited herein include not only the above-listed point values, but also any point values between the above-listed numerical ranges that are not listed, and are limited in space and for the sake of brevity, the present invention is not intended to be exhaustive of the specific point values that the stated ranges include.
Compared with the prior art, the invention has the following beneficial effects:
the adjusting device provided by the invention is simple and convenient to use, the insert at the lower end of the adjusting device is inserted into the water jet, the fixing piece at the upper end of the adjusting device is used for fixing the sample support, the axis of the sample support and the central line of the water jet are ensured to be on the same straight line, errors caused by artificial factors when the relative position between the sample support and the water jet is adjusted by using the steel plate ruler are overcome, the accuracy is improved, and the adjusting time is shortened.
Drawings
Fig. 1 is a schematic structural diagram of an adjusting device for a sample support in a steel end quenching test according to embodiment 1 of the present invention;
Fig. 2 is a schematic structural diagram of an adjusting device for a sample support in a steel end quenching test according to embodiment 2 of the present invention;
wherein, 1-support, 2-mount, 3-insert.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
Example 1
The embodiment provides an adjusting device of a sample bracket in a steel end quenching test, as shown in fig. 1, the adjusting device comprises a support piece 1, wherein the upper end and the lower end of the support piece 1 are respectively and independently fixedly connected with 1 fixing piece 2 and an inserting piece 3;
the shape of the supporting piece 1, the fixing piece 2 and the inserting piece 3 is cylindrical;
the central line of the fixing piece 2 and the central line of the inserting piece 3 are on the same straight line;
the supporting piece 1, the fixing piece 2 and the inserting piece 3 are all made of 20 steel;
the diameter of the supporting piece 1 is 32mm, and the height is 1065mm;
the diameter of the fixing piece 2 is 25mm, and the height is 10mm;
The diameter of the insert 3 is 12.5mm and the height is 10mm.
Example 2
The embodiment provides an adjusting device of a sample bracket in a steel end quenching test, as shown in fig. 2, the adjusting device comprises a support piece 1, wherein the upper end and the lower end of the support piece 1 are respectively and independently fixedly connected with 1 fixing piece 2 and an inserting piece 3;
the shape of the supporting piece 1, the fixing piece 2 and the inserting piece 3 is cylindrical;
the central line of the fixing piece 2 and the central line of the inserting piece 3 are on the same straight line;
The supporting piece 1, the fixing piece 2 and the inserting piece 3 are made of 45 steel;
the diameter of the supporting piece 1 is 31mm, and the height is 1060mm;
the diameter of the fixing piece 2 is 24mm, and the height is 9mm;
The diameter of the insert 3 is 12mm and the height is 9mm.
Example 3
The embodiment provides an adjusting device of a sample bracket in a steel end quenching test, which comprises a support piece 1, wherein the upper end and the lower end of the support piece 1 are respectively and independently fixedly connected with 1 fixing piece 2 and an inserting piece 3;
the shape of the supporting piece 1, the fixing piece 2 and the inserting piece 3 is cylindrical;
the central line of the fixing piece 2 and the central line of the inserting piece 3 are on the same straight line;
The supporting piece 1, the fixing piece 2 and the inserting piece 3 are all made of 35 steel;
the diameter of the support 1 is 33mm and the height is 1070mm;
The diameter of the fixing piece 2 is 26mm, and the height is 11mm;
The diameter of the insert 3 is 13mm and the height is 11mm.
Application example 1
The application example provides a use method of the adjusting device, and the use method comprises the following steps of: the insert 3 at the lower end of the support 1 is inserted into the water jet, and the fixing piece 2 at the upper end of the support 1 fixes the sample support, so that the axis of the sample support and the central line of the water jet are on the same straight line.
In summary, the adjusting device provided by the invention is simple and convenient, and can overcome errors caused by human factors when the relative position between the sample support and the water jet is adjusted by using the steel plate ruler, thereby improving the accuracy, shortening the adjusting time of the sample support and improving the working efficiency.
The applicant declares that the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that are easily conceivable within the technical scope of the present invention disclosed by the present invention fall within the scope of the present invention and the disclosure.
Claims (3)
1. The device for adjusting the sample bracket in the steel end quenching test is characterized by comprising a supporting piece, wherein the upper end and the lower end of the supporting piece are respectively and independently fixedly connected with 1 fixing piece and an inserting piece;
The shape of the supporting piece, the fixing piece and the inserting piece is cylindrical;
the central line of the fixing piece and the central line of the inserting piece are on the same straight line;
The diameter of the supporting piece is 31-33mm, and the height of the supporting piece is 1060-1070mm;
The diameter of the fixing piece is 24-26mm, and the height of the fixing piece is 9-11mm;
the diameter of the insert is 12-13mm and the height is 9-11mm.
2. The adjustment device of claim 1, wherein the support member, the securing member and the insert are all steel alloys.
3. A method of use with an adjustment device according to claim 1 or 2, characterized in that the method of use comprises: the insert at the lower end of the support member is inserted into the water jet, and the fixing member at the upper end of the support member fixes the sample support, thereby ensuring that the axis of the sample support is on the same straight line with the central line of the water jet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210219990.2A CN114606371B (en) | 2022-03-08 | 2022-03-08 | Adjusting device for sample support in steel end quenching test and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210219990.2A CN114606371B (en) | 2022-03-08 | 2022-03-08 | Adjusting device for sample support in steel end quenching test and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114606371A CN114606371A (en) | 2022-06-10 |
| CN114606371B true CN114606371B (en) | 2024-05-10 |
Family
ID=81861031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210219990.2A Active CN114606371B (en) | 2022-03-08 | 2022-03-08 | Adjusting device for sample support in steel end quenching test and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114606371B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1364802A (en) * | 1971-01-21 | 1974-08-29 | Voest Ag | Apparatus for carrying out end quench tests |
| US4305574A (en) * | 1976-06-18 | 1981-12-15 | Ajax Magnethermic Corporation | Quenching device |
| CN1394970A (en) * | 2002-08-08 | 2003-02-05 | 上海交通大学 | Tail end quenching equipment of medium-high hardenability steel and hardenability testing method |
| JP2006307300A (en) * | 2005-05-02 | 2006-11-09 | Denki Kogyo Co Ltd | Method for correcting deflection of shaft body, and high-frequency induction heating device for shaft body |
| CN200988848Y (en) * | 2006-12-20 | 2007-12-12 | 天津钢铁有限公司 | Metal material end quenching machine |
| WO2015020915A1 (en) * | 2013-08-04 | 2015-02-12 | Thermatool Corp. | Spray quench systems for heat treated metal products |
| CN206143250U (en) * | 2016-09-23 | 2017-05-03 | 昆明理工大学 | Terminal quenching experimental apparatus |
| CN106636580A (en) * | 2016-12-16 | 2017-05-10 | 昆明理工大学 | Tail end quenching experiment device |
| CN108548836A (en) * | 2018-03-20 | 2018-09-18 | 上海理工大学 | The end hardening test device and method of aluminum alloy hardenability |
| CN108611473A (en) * | 2018-07-25 | 2018-10-02 | 山东瀚晟仪器设备有限公司 | End hardening testing machine |
| CN108676977A (en) * | 2018-06-08 | 2018-10-19 | 上海电机学院 | A kind of quenching unit and method measuring aluminum alloy hardenability |
| CN208501040U (en) * | 2018-07-18 | 2019-02-15 | 山东瀚晟仪器设备有限公司 | End hardening testing machine water spray bracket self-centering device of workpiece |
| CN110643793A (en) * | 2019-01-23 | 2020-01-03 | 广东韶钢松山股份有限公司 | Method for testing distance between water spraying pipe opening of end quenching machine and sample support |
| CN211947123U (en) * | 2020-04-10 | 2020-11-17 | 马鞍山钢铁股份有限公司 | End quenching sample heat treatment device |
| CN113373384A (en) * | 2021-06-17 | 2021-09-10 | 承德建龙特殊钢有限公司 | Steel for petroleum casing coupling material and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8034285B2 (en) * | 2007-11-15 | 2011-10-11 | Sterling Engineering And Manufacturing Company, Inc. | Quenching methods and apparatus |
| WO2017056582A1 (en) * | 2015-09-30 | 2017-04-06 | 日立金属株式会社 | Method for deriving cooling time when quenching steel material, method for quenching steel material, and method for quenching and tempering steel material |
| CN109957638B (en) * | 2019-03-06 | 2019-11-15 | 上海交通大学 | A kind of method that the horizontal water quenching of shaft forgings with holes avoids inner hole from cracking |
-
2022
- 2022-03-08 CN CN202210219990.2A patent/CN114606371B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1364802A (en) * | 1971-01-21 | 1974-08-29 | Voest Ag | Apparatus for carrying out end quench tests |
| US4305574A (en) * | 1976-06-18 | 1981-12-15 | Ajax Magnethermic Corporation | Quenching device |
| CN1394970A (en) * | 2002-08-08 | 2003-02-05 | 上海交通大学 | Tail end quenching equipment of medium-high hardenability steel and hardenability testing method |
| JP2006307300A (en) * | 2005-05-02 | 2006-11-09 | Denki Kogyo Co Ltd | Method for correcting deflection of shaft body, and high-frequency induction heating device for shaft body |
| CN200988848Y (en) * | 2006-12-20 | 2007-12-12 | 天津钢铁有限公司 | Metal material end quenching machine |
| WO2015020915A1 (en) * | 2013-08-04 | 2015-02-12 | Thermatool Corp. | Spray quench systems for heat treated metal products |
| CN206143250U (en) * | 2016-09-23 | 2017-05-03 | 昆明理工大学 | Terminal quenching experimental apparatus |
| CN106636580A (en) * | 2016-12-16 | 2017-05-10 | 昆明理工大学 | Tail end quenching experiment device |
| CN108548836A (en) * | 2018-03-20 | 2018-09-18 | 上海理工大学 | The end hardening test device and method of aluminum alloy hardenability |
| CN108676977A (en) * | 2018-06-08 | 2018-10-19 | 上海电机学院 | A kind of quenching unit and method measuring aluminum alloy hardenability |
| CN208501040U (en) * | 2018-07-18 | 2019-02-15 | 山东瀚晟仪器设备有限公司 | End hardening testing machine water spray bracket self-centering device of workpiece |
| CN108611473A (en) * | 2018-07-25 | 2018-10-02 | 山东瀚晟仪器设备有限公司 | End hardening testing machine |
| CN110643793A (en) * | 2019-01-23 | 2020-01-03 | 广东韶钢松山股份有限公司 | Method for testing distance between water spraying pipe opening of end quenching machine and sample support |
| CN211947123U (en) * | 2020-04-10 | 2020-11-17 | 马鞍山钢铁股份有限公司 | End quenching sample heat treatment device |
| CN113373384A (en) * | 2021-06-17 | 2021-09-10 | 承德建龙特殊钢有限公司 | Steel for petroleum casing coupling material and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN114606371A (en) | 2022-06-10 |
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