CN114517251A - Heat treatment cooling device and method for 15-5PH stainless steel shale gas fracturing pump - Google Patents
Heat treatment cooling device and method for 15-5PH stainless steel shale gas fracturing pump Download PDFInfo
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- CN114517251A CN114517251A CN202011313061.5A CN202011313061A CN114517251A CN 114517251 A CN114517251 A CN 114517251A CN 202011313061 A CN202011313061 A CN 202011313061A CN 114517251 A CN114517251 A CN 114517251A
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- heat treatment
- quenching
- stainless steel
- shale gas
- outlet pipe
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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
- C21D1/63—Quenching devices for bath quenching
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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
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
-
- 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
Abstract
The invention relates to a rake-shaped formed by connecting iron pipes, wherein a water outlet pipe is manufactured by using the iron pipes with corresponding diameters, quantities and lengths according to the structure of a workpiece, the other end of the water outlet pipe is a water inlet pipe and is connected with a conversion joint, a PLC flow rate control system and a lift water pump device, wherein the lift water pump is placed in a quenching liquid tank during quenching, when a heat treatment quenching cooling process is executed, the water outlet pipe of the device is correspondingly placed in an inner hole of a part to be quenched, which is placed on a heat treatment frame, the PLC flow rate control system is turned on, a lift water pump switch is turned on, a mechanical quenching frame is operated, so that a product is immersed in quenching liquid, and the heat treatment quenching process operation of the part is executed according to the heat treatment process requirements of the part. In the quenching and cooling process, the quenching liquid always keeps the cooling effect on the inner hole through the device, and the rapid and uniform cooling of the inner hole heat treatment is realized. The device has the advantages of simple structure, easy manufacture, low cost, good operation stability, high production efficiency, strong operability, reduction of product rejection rate and improvement of the quality of heat treatment products.
Description
Technical Field
The invention relates to a heat treatment cooling device and method for a 15-5PH stainless steel shale gas fracturing pump, and belongs to the technical field of steel heat treatment cooling.
Background
The 15-5PH steel is a martensite precipitation hardening stainless steel with the domestic trade mark of 0Cr15Ni5Cu3 Nb. The 15-5PH steel is developed on the basis of 17-4PH stainless steel to overcome the defect of plasticity reduction caused by delta ferrite in a 17-4PH structure, and has the advantages of high strength, excellent transverse toughness, good forgeability, small deformation, corrosion resistance and the like. The 15-5PH heat treatment method is to form martensite by using solution treatment, and precipitate a strengthening phase by aging treatment to generate precipitation hardening. The 15-5PH parts develop significant internal stresses (both structural and thermal) during heat treatment quenching, which cause deformation of the part when these stresses exceed the yield strength of the steel, and cracking of the part when the stresses are greater, exceeding the tensile strength of the steel. In order to ensure hardenability and material performance, a 15-5PH stainless steel shale gas fracturing pump is usually subjected to rough machining for opening before heat treatment, the cooling speed is not uniform in the quenching cooling process, a large amount of rapid steam vaporization of quenching liquid accumulated in a hole at high temperature is carried out, and a certain pressure difference exists between the inner hole and the outside due to large-area heat absorption, so that uneven tensile stress is generated on the surface of the hole in the material.
In the production process, because a large number of 15-5PH stainless steel shale gas fracturing pumps need to be subjected to heat treatment, the control of the cooling speed and the difference between the cooling speed of the inner hole and the cooling speed of the outer surface in the quenching and cooling link is particularly critical. Therefore, the device for quenching and cooling the inner hole becomes very important, and in order to reduce the cost of the detection device, the production preparation time and improve the production efficiency, reduce the influence of human factors in the cooling process of the heat treatment operation in terms of product quality and improve the automation of the operation, the heat treatment cooling device and the heat treatment cooling method of the 15-5PH stainless steel shale gas fracturing pump are needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a heat treatment cooling device of a 15-5PH stainless steel shale gas fracturing pump, which has the specific technical scheme that: including inlet tube, parent tube and a plurality of outlet pipes, the inlet tube communicates with one side of parent tube, the outlet pipe is parallel side by side, with the opposite side intercommunication of parent tube, the inlet tube uses crossover sub and extension hose connection, the extension hose is equipped with PLC liquid flow velocity control system and lift water pump in proper order, PLC liquid flow velocity control system sets up in extension hose middle section, the lift water pump sets up in the extension hose end.
Further, the length of the water inlet pipe is 1/4 the hole depth of the workpiece, and the distance between the water inlet pipes is based on the distance between the lateral holes of the workpiece side hole structure.
Furthermore, the material of inlet tube, parent tube and outlet pipe chooses for use steel material.
Furthermore, a water inlet is formed in the center of one side of the base pipe, and the water inlet pipe is welded with the water inlet correspondingly at the water inlet and is kept vertical to the water inlet; the other side of the base pipe is provided with a plurality of water outlets, and the water outlet pipe is welded with the water outlets correspondingly and is kept vertical to the water outlets, so that the water inlet pipe, the base pipe and the water inlet pipe are in a rake shape.
Further, the parameters selected by the lift water pump include the following: flow rate: 1-22m3H, windThe process: 6-232m, power: 0.37-15kw, rotation speed: 2900r/min, caliber: phi 25-phi 50, temperature range: -15 ℃ to + 120 ℃.
The heat treatment cooling method of the 15-5PH stainless steel shale gas fracturing pump comprises the following specific technical scheme:
step 2: opening a PLC flow rate control system and setting parameters; starting a lift water pump and adjusting parameters; starting a stirrer at the bottom of the quenching tank;
and step 3: operating a mechanical quenching frame above the quenching liquid to immerse the workpiece into the quenching liquid; and (4) carrying out quenching process operation, flushing quenching liquid into the surface of the inner hole, and circularly cooling the surface of the inner hole.
Further, the PLC flow rate control system is controlled by a flow constant device, and is set to be supplied with water for 15 minutes and shut down for 3 minutes; the parameter of the lift water pump is adjusted to be 3m3/h。
The invention has the beneficial effects that:
the device has simple structure, is easy to operate and reduces the labor intensity of heat treatment operators; can be quickly adapted to the site for quick cooling. The forging die is suitable for various forgings made of different materials, meets the requirement of batch production, improves the production efficiency, reduces the rejection rate, reduces the influence of human factors in the cooling process of heat treatment operation in the aspect of product quality, improves the automation of operation, and has better implementation effect through the verification of production practice. This provides effectual quality assurance for forging heat treatment process hole quality.
The method balances the difference between the internal cooling speed and the external cooling speed in the heat treatment cooling process, balances the stress release in the internal and external quenching processes of the material, reduces the quality risk of the inner hole cracks, reduces the rejection rate, shortens the production period and improves the production efficiency.
Drawings
Figure 1 is a schematic view of the structure of the cooling device of the present invention,
figure 2 is a schematic view of a test forging of embodiment 1 of the invention,
in the figure: 1-outlet pipe, 2-parent tube, 3-inlet tube, 4-conversion joint, 5-PLC liquid flow rate control system, 6-lift water pump, 7-agitator.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Example 1: detecting a forged piece: the sleeve head and the material are 15-5PH, the heat treatment method is solid solution heating → solid solution quenching → tempering heating, after the heat treatment state is rough machining, the middle through hole with the diameter of 5X phi 80 +/-1 mm is machined, the surface entering the furnace is a rough machining surface, and the heat treatment process requires that:
1. when solid solution heating is carried out, the charging temperature is less than or equal to 685 ℃, and the heating speed is less than or equal to 230 ℃/h.
2. When tempering and heating are carried out, the charging temperature is less than or equal to 458 ℃, and the temperature rising speed is less than or equal to 250 ℃/h.
3. During solution quenching, the workpiece is immersed in the quenching liquid and moves up and down for at least 21 minutes.
4. The time interval between the time when the part is transferred to the tempering furnace after the solution quenching is finished is not more than 88 minutes.
The method comprises the following steps: a plurality of steel water pipes with suitable specifications are selected according to the size of a heat treatment product, the length is 150mm, and the diameter is 50 mm.
Step two: choose one steel material water pipe that is suitable for the specification according to heat treatment product size (the horizontal maximum span of pore structure), length is 1146mm, use product side opening pore structure horizontal hole interval as the basis, trompil a steel material water pipe to with a plurality of steel material water pipes of delivery port rather than corresponding the welding, select in addition that a length is 100mm, the steel material water pipe that the diameter is 50mm welds with the steel material water pipe of intermediate position trompil, form "rake" form heat treatment quenching delivery port cooling device structure.
Step three: a water pipe adapter is additionally arranged at the water inlet position of the steel water pipe, a hose at the water inlet end is conveniently connected, and a PLC liquid flow velocity control system and a PLC liquid flow velocity control device are sequentially connectedThe lift water pump, the poplar pump parameter of choosing for use includes the flow: 6m3H, lift: 40m, power: 5kw, rotation speed: 1800r/min, caliber: phi 50mm, temperature range: -15 ℃ to + 120 ℃.
Step four: putting the steel plate into a quenching liquid tank during quenching, starting a PLC flow rate control system when a heat treatment quenching cooling process is executed, setting a flow constant device for control according to the parameter requirements of a heat treatment process card, introducing water for 15 minutes, stopping for 3 minutes, starting a lift water pump starting switch, and adjusting the parameter to be 3m3And h, starting a stirrer switch at the bottom of the quenching tank controlled by an 11kw motor, operating a mechanical quenching frame above the quenching liquid to slowly immerse the product into the quenching liquid, and executing the part heat treatment quenching process operation according to the part heat treatment process requirement. So that the water is flushed into the surface of the inner hole to circularly cool the surface of the inner hole, thereby realizing the heat treatment cooling operation of the inner hole of the shale gas fracturing pump.
The invention is suitable for the rapid cooling operation on site. The production device has simple structure, easy operation, reduced labor intensity of heat treatment operators, shortened production time and shortened production period. The forging die is suitable for various forgings made of different materials, meets the requirement of batch production, improves the production efficiency, reduces the rejection rate, reduces the influence of human factors in the cooling process of heat treatment operation in the aspect of product quality, improves the automation of operation, and has better implementation effect through the verification of production practice. This provides effectual quality assurance for forging heat treatment process hole quality.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" as used herein is intended to include both the individual components or both.
The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides a heat treatment cooling device of 15-5PH stainless steel shale gas fracturing pump which characterized in that: including inlet tube (3), parent tube (2) and a plurality of outlet pipe (1), inlet tube (3) and one side intercommunication of parent tube (2), outlet pipe (2) parallel side by side, with the opposite side intercommunication of parent tube (2), inlet tube (3) use crossover sub (4) and extension hose connection, the extension hose is equipped with PLC liquid flow velocity control system (5) and lift water pump (6) in proper order, PLC liquid flow velocity control system (5) set up in extension hose middle section, lift water pump (6) set up in extension hose end.
2. The heat treatment cooling device of the 15-5PH stainless steel shale gas fracturing pump of claim 1, wherein: the length of inlet tube (3) is 1/4 of work piece hole depth, the interval between inlet tube (3) uses work piece side opening interval as the basis.
3. The heat treatment cooling device of the 15-5PH stainless steel shale gas fracturing pump of claim 1, wherein: the water inlet pipe (3), the base pipe (2) and the water outlet pipe (1) are made of steel.
4. The heat treatment cooling device of the 15-5PH stainless steel shale gas fracturing pump of claim 1, wherein: a water inlet is formed in the center of one side of the base pipe (2), and the water inlet pipe (3) is welded with the water inlet correspondingly and keeps vertical to the water inlet; the other side of base tube (2) is equipped with a plurality of delivery port, outlet pipe (1) is rather than corresponding welding in the delivery port and keep perpendicular for inlet tube (3), base tube (2) and inlet tube (1) are the rake form.
5. The heat treatment cooling device of the 15-5PH stainless steel shale gas fracturing pump of claim 1, wherein: the parameters selected by the lift water pump (6) comprise the following parameters: flow rate: 1-22m3H, lift: 6-232m, power: 0.37-15kw, rotation speed: 2900r/min, caliber: phi 25-phi 50, temperature range: minus 15 ℃ to plus 120 ℃.
The heat treatment cooling method of the 6.15-5PH stainless steel shale gas fracturing pump is characterized by comprising the following steps:
step 1, inserting a water outlet pipe (1) of a cooling device into an inner hole of a workpiece, and putting a lift water pump (6) into a quenching liquid tank; placing the workpiece on a mechanical quenching frame above the quenching liquid;
and 2, step: opening a PLC flow rate control system (5) and setting parameters; starting a lift water pump (6) and adjusting parameters; starting a stirrer (7) at the bottom of the quenching tank;
and step 3: operating a mechanical quenching frame above the quenching liquid to immerse the workpiece into the quenching liquid; and (4) carrying out quenching process operation, flushing quenching liquid into the surface of the inner hole, and circularly cooling the surface of the inner hole.
7. The heat treatment cooling method for the 15-5PH stainless steel shale gas fracturing pump as claimed in claim 6, wherein:
the PLC flow rate control system (5) is controlled by a flow constant device, and is set to be supplied with water for 15 minutes and shut down for 3 minutes; the parameter of the lift water pump is adjusted to be 3m3/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313061.5A CN114517251A (en) | 2020-11-20 | 2020-11-20 | Heat treatment cooling device and method for 15-5PH stainless steel shale gas fracturing pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313061.5A CN114517251A (en) | 2020-11-20 | 2020-11-20 | Heat treatment cooling device and method for 15-5PH stainless steel shale gas fracturing pump |
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| CN114517251A true CN114517251A (en) | 2022-05-20 |
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| CN202011313061.5A Pending CN114517251A (en) | 2020-11-20 | 2020-11-20 | Heat treatment cooling device and method for 15-5PH stainless steel shale gas fracturing pump |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965480A (en) * | 2012-11-16 | 2013-03-13 | 上海交通大学 | Method and equipment for quenching and cooling thick-walled steel pipe |
| CN104451067A (en) * | 2014-11-28 | 2015-03-25 | 南京迪威尔高端制造股份有限公司 | Centralized/distributed heat treatment cooling device and method |
| CN204298428U (en) * | 2014-11-28 | 2015-04-29 | 南京迪威尔高端制造股份有限公司 | A kind of stirring and hollow spray streaming heat treatment cooling device |
| CN109868348A (en) * | 2019-03-06 | 2019-06-11 | 上海交通大学 | A kind of horizontal quenching refrigerating device with larger diameter internal bore shaft forgings |
| CN110396575A (en) * | 2019-08-21 | 2019-11-01 | 河南中原特钢装备制造有限公司 | The heat treatment process of landification equipment martensitic stain less steel main shaft |
| US20200283865A1 (en) * | 2019-03-06 | 2020-09-10 | Shanghai Jiao Tong University | Method for preventing cracking along the surface at the inner hole of a hollow shaft during horizontal water quenching |
| CN211620576U (en) * | 2019-12-31 | 2020-10-02 | 苏州雷格姆海洋石油设备科技有限公司 | Quenching device for inner hole of forging |
-
2020
- 2020-11-20 CN CN202011313061.5A patent/CN114517251A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965480A (en) * | 2012-11-16 | 2013-03-13 | 上海交通大学 | Method and equipment for quenching and cooling thick-walled steel pipe |
| CN104451067A (en) * | 2014-11-28 | 2015-03-25 | 南京迪威尔高端制造股份有限公司 | Centralized/distributed heat treatment cooling device and method |
| CN204298428U (en) * | 2014-11-28 | 2015-04-29 | 南京迪威尔高端制造股份有限公司 | A kind of stirring and hollow spray streaming heat treatment cooling device |
| CN109868348A (en) * | 2019-03-06 | 2019-06-11 | 上海交通大学 | A kind of horizontal quenching refrigerating device with larger diameter internal bore shaft forgings |
| US20200283865A1 (en) * | 2019-03-06 | 2020-09-10 | Shanghai Jiao Tong University | Method for preventing cracking along the surface at the inner hole of a hollow shaft during horizontal water quenching |
| CN110396575A (en) * | 2019-08-21 | 2019-11-01 | 河南中原特钢装备制造有限公司 | The heat treatment process of landification equipment martensitic stain less steel main shaft |
| CN211620576U (en) * | 2019-12-31 | 2020-10-02 | 苏州雷格姆海洋石油设备科技有限公司 | Quenching device for inner hole of forging |
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