CN111593186A - Heat treatment process for improving impact power of stainless steel cylinder body for oil field - Google Patents
Heat treatment process for improving impact power of stainless steel cylinder body for oil field Download PDFInfo
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- CN111593186A CN111593186A CN202010451309.8A CN202010451309A CN111593186A CN 111593186 A CN111593186 A CN 111593186A CN 202010451309 A CN202010451309 A CN 202010451309A CN 111593186 A CN111593186 A CN 111593186A
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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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- 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
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- 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)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to a heat treatment process for improving the impact power of a stainless steel cylinder body for an oil field, which comprises the following steps: step 1), high-temperature solution treatment: two hanging scaffold of a well type high temperature heating furnace are used for clamping, the distance between workpieces is more than or equal to 200mm, the temperature of the workpieces is less than or equal to 400 ℃, the temperature is maintained at 580-680 ℃ for 3h according to the speed of less than or equal to 50 ℃/h-100 ℃/h, then the temperature is raised to 850-950 ℃ according to the speed of less than or equal to 50 ℃/h-100 ℃/h, the temperature is maintained for 3h, the temperature is raised to 1020-1060 ℃, the temperature is equalized for 5h, and the; step 2), cooling treatment: taking the cylinder out of the furnace, cooling the cylinder for 3-10 min by using a cooling water tank, cooling the cylinder by using water in the cooling water tank for 150-200 min after water cooling, transferring liquid nitrogen into a deep cooling furnace for deep cooling after oil cooling, returning the workpiece to room temperature after deep cooling, and performing step 3) aging treatment: the cylinder body is put into a well type low temperature heating furnace, the temperature of the cylinder body is less than or equal to 400 ℃, is less than or equal to 50 ℃/h-100 ℃/h, is heated to 500-600 ℃, is kept at the same temperature for 5-8 h, is discharged from the furnace and is cooled to room temperature in an air cooling mode, the tissue transformation is full, the tissue stability is high, and the impact energy is improved.
Description
Technical Field
The invention belongs to the technical field of heat treatment of stainless steel cylinder bodies for oil fields, and particularly relates to a heat treatment process for improving the impact energy of stainless steel cylinder bodies for oil fields, which solves the problems of insufficient tissue transformation, low impact energy and poor stability of stainless steel cylinder bodies.
Background
The stainless steel cylinder body for the oil field is a key component for improving the yield of oil gas in the fracturing and acidizing operation of the oil field, because the use environment is severe in the drilling process, according to the service conditions, failure analysis and actual production requirements of the stainless steel cylinder body for the oil field, the stainless steel cylinder body is mainly made of materials with high pressure resistance, corrosion resistance, erosion resistance and the like, at present, the high-end stainless steel cylinder body for the oil field is made of 17-4PH martensite precipitation hardening stainless steel, but the alloy content of the steel is high, the Ms transformation point is basically 120-190 ℃, and the Mf point is about 32 ℃. At present, according to a quenching oil cooling heat treatment process adopted conventionally, the cooling strength is weak, the structure is difficult to completely change, the complete change of the structure cannot be ensured, the impact power is low, the stability is poor, and the delivery technical conditions cannot be met. Therefore, a heat treatment process for improving the impact energy of the stainless steel cylinder body for the oil field is urgently needed, the impact energy is improved, and the delivery technical conditions are met.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the heat treatment process for improving the impact energy of the stainless steel cylinder body for the oil field, which can achieve sufficient tissue transformation, has high tissue stability and obviously improves the impact energy.
The purpose of the invention is realized as follows:
a heat treatment process for improving the impact energy of a stainless steel cylinder body for an oil field comprises the following process steps:
step 1), high-temperature solution treatment: two workpieces are loaded and clamped by using a hanging scaffold, the distance between the workpieces is more than or equal to 200mm, a pit-type high-temperature heating furnace is selected as the heating furnace, the charging temperature is less than or equal to 400 ℃, the temperature is kept at 580-680 ℃ for 3h according to the speed of less than or equal to 50 ℃/h-100 ℃/h, then the temperature is raised to 850-950 ℃ according to the speed of less than or equal to 50 ℃/h-100 ℃/h, the temperature is kept for 3h, the full-power temperature is raised to 1020-1060 ℃, the temperature is equalized for 5h, the temperature is kept for;
step 2), cooling treatment: taking the cylinder body subjected to the step 1) out of the furnace for air cooling, wherein the air cooling time is less than or equal to 100s, then carrying out water cooling for 3-10 min by using a cooling water tank, placing the cylinder body in a cooling oil tank after the water cooling is finished for oil cooling for 150-200 min, controlling the oil temperature to be less than or equal to 70 ℃, transferring the workpiece into a deep cooling furnace after the oil cooling is finished, filling liquid nitrogen for cryogenic treatment, controlling the cryogenic temperature to be-70-100 ℃, preserving the temperature for 8h in the section, standing for 24h at the room temperature after the deep cooling is finished, returning the temperature of the workpiece to the room temperature, and preparing for charging into the furnace for aging treatment;
step 3), aging treatment: and (3) putting the cylinder body after the step 2) into a well type low-temperature heating furnace, heating to 500-600 ℃ at the charging temperature of less than or equal to 400 ℃ and less than or equal to 50 ℃/h-100 ℃/h, keeping the temperature for 5-8 h, taking out of the furnace, and air cooling to room temperature.
The specification of the well type high temperature heating furnace is phi 2200mm 12000 mm.
The specification of the deep cooling furnace is 6500mm 1300 mm.
In the step 2), when water cooling is carried out by a cooling water tank, the water temperature is controlled to be less than or equal to 25 ℃.
In the step 2), when the cylinder body is placed in a cooling oil tank for oil cooling after the water cooling is finished, the oil temperature is controlled to be less than or equal to 70 ℃.
The specification of the well type low-temperature heating furnace is phi 2200mm 12000 mm.
The stainless steel cylinder body for the oil field is made of a 17-4PH material.
The invention has the following beneficial effects:
the invention provides a heat treatment process for improving the impact energy of a stainless steel cylinder body for an oil field, which solves the problems of insufficient tissue transformation, low impact energy and poor stability of the stainless steel cylinder body.
Detailed Description
Example 1: the invention relates to a heat treatment process for improving the impact power of a stainless steel cylinder body for an oil field, wherein the stainless steel cylinder body for the oil field is made of a 17-4PH material, and comprises the following chemical components: 0.07% for C, 0.41% for Si, 0.65% for Mn, 15.45% for Cr, 4.69% for Ni, 0.002% for S, 0.013% for P, 3.08% for Cu, 0.29% for Nb: 566mm 515mm 1533mm square billet, the heat treatment process is as follows:
step 1), high-temperature solution treatment: two workpieces are loaded and clamped by using a hanging scaffold, the distance between the workpieces is more than or equal to 200mm, a phi 2200mm and 12000mm well-type high-temperature heating furnace is selected as the heating furnace, the charging temperature is less than or equal to 400 ℃, the temperature is kept at 600 ℃ for 3h according to the speed of less than or equal to 60 ℃/h, then the temperature is increased to 900 ℃ according to the speed of less than or equal to 60 ℃/h for heat preservation for 3h, the full-power temperature is increased to 1050 ℃, the temperature is equalized for 5h, the temperature is kept for 5h, and;
step 2), cooling treatment: taking the cylinder body which is subjected to the step 1) out of the furnace, cooling the cylinder body for less than or equal to 100s, then carrying out water cooling for 7min (controlling the water temperature to be less than or equal to 25 ℃) by using a cooling water tank, placing the cylinder body in a cooling oil tank after the water cooling is finished, carrying out oil cooling for 160min (controlling the oil temperature to be less than or equal to 70 ℃), transferring the workpiece into a deep cooling furnace with the specification of 6500mm x 1300mm after the oil cooling is finished, filling liquid nitrogen for cryogenic treatment, controlling the cryogenic temperature to be-80 ℃, preserving the temperature for 8h at the section, standing the workpiece at the room temperature for 24h after the deep cooling is finished, returning the temperature of the workpiece to the;
step 3), aging treatment: and (3) putting the cylinder body after the step 2) into a well type low-temperature heating furnace with the specification of phi 2200mm x 12000mm, heating to 550 ℃ at the temperature of less than or equal to 400 ℃ and less than or equal to 60 ℃/h, keeping the temperature for 6h, taking out of the furnace, and air cooling to room temperature.
After the production according to the heat treatment process, the detection results are as follows:
after the stainless steel cylinder body for the oil field is produced by the heat treatment process for improving the impact energy, the performance detection result meets the requirement and is delivered successfully.
Example 2: the invention relates to a heat treatment process for improving the impact power of a stainless steel cylinder body for an oil field, wherein the stainless steel cylinder body for the oil field is made of a 17-4PH material, and comprises the following chemical components: 0.067% of C, 0.42% of Si, 0.73% of Mn, 15.83% of Cr, 4.77% of Ni, 0.003% of S, 0.02% of P, 3.20% of Cu, 0.33% of Nb: the heat treatment process of the square billet with 626mm 515mm 1610mm is as follows:
step 1), high-temperature solution treatment: two workpieces are loaded and clamped by using a hanging scaffold, the distance between the workpieces is more than or equal to 200mm, a phi 2200mm and 12000mm well-type high-temperature heating furnace is selected as the heating furnace, the charging temperature is less than or equal to 400 ℃, the temperature is kept at 600 ℃ for 3h according to the speed of less than or equal to 60 ℃/h, then the temperature is increased to 900 ℃ according to the speed of less than or equal to 60 ℃/h for heat preservation for 3h, the full-power temperature is increased to 1050 ℃, the temperature is equalized for 5h, the temperature is kept for 5h, and;
step 2), cooling treatment: taking the cylinder body which is subjected to the step 1) out of the furnace, cooling the cylinder body for less than or equal to 100s, then carrying out water cooling for 7min (controlling the water temperature to be less than or equal to 25 ℃) by using a cooling water tank, placing the cylinder body in a cooling oil tank after the water cooling is finished, carrying out oil cooling for 160min (controlling the oil temperature to be less than or equal to 70 ℃), transferring the workpiece into a deep cooling furnace with the specification of 6500mm x 1300mm after the oil cooling is finished, filling liquid nitrogen for cryogenic treatment, controlling the cryogenic temperature to be-80 ℃, preserving the temperature for 8h at the section, standing the workpiece at the room temperature for 24h after the deep cooling is finished, returning the temperature of the workpiece to the;
step 3), aging treatment: and (3) putting the cylinder body after the step 2) into a well type low-temperature heating furnace with the specification of phi 2200mm x 12000mm, heating to 550 ℃ at the temperature of less than or equal to 400 ℃ and less than or equal to 60 ℃/h, keeping the temperature for 6h, taking out of the furnace, and air cooling to room temperature.
After the production according to the heat treatment process, the detection results are as follows:
after the stainless steel cylinder body for the oil field is produced by the heat treatment process for improving the impact energy, the performance detection result meets the requirement and is delivered successfully.
Claims (7)
1. A heat treatment process for improving the impact power of a stainless steel cylinder body for an oil field is characterized by comprising the following steps of: the process comprises the following steps:
step 1), high-temperature solution treatment: two workpieces are loaded and clamped by using a hanging scaffold, the distance between the workpieces is more than or equal to 200mm, a pit-type high-temperature heating furnace is selected as the heating furnace, the charging temperature is less than or equal to 400 ℃, the temperature is kept at 580-680 ℃ for 3h according to the speed of less than or equal to 50 ℃/h-100 ℃/h, then the temperature is raised to 850-950 ℃ according to the speed of less than or equal to 50 ℃/h-100 ℃/h, the temperature is kept for 3h, the full-power temperature is raised to 1020-1060 ℃, the temperature is equalized for 5h, the temperature is kept for;
step 2), cooling treatment: taking the cylinder body subjected to the step 1) out of the furnace for air cooling, wherein the air cooling time is less than or equal to 100s, then carrying out water cooling for 3-10 min by using a cooling water tank, placing the cylinder body in a cooling oil tank after the water cooling is finished for oil cooling for 150-200 min, controlling the oil temperature to be less than or equal to 70 ℃, transferring the workpiece into a deep cooling furnace after the oil cooling is finished, filling liquid nitrogen for cryogenic treatment, controlling the cryogenic temperature to be-70-100 ℃, preserving the temperature for 8h in the section, standing for 24h at the room temperature after the deep cooling is finished, returning the temperature of the workpiece to the room temperature, and preparing for charging into the furnace for aging treatment;
step 3), aging treatment: and (3) putting the cylinder body after the step 2) into a well type low-temperature heating furnace, heating to 500-600 ℃ at the charging temperature of less than or equal to 400 ℃ and less than or equal to 50 ℃/h-100 ℃/h, keeping the temperature for 5-8 h, taking out of the furnace, and air cooling to room temperature.
2. The heat treatment process for improving the impact power of the stainless steel cylinder for the oil field according to claim 1, which is characterized in that: the specification of the well type high temperature heating furnace is phi 2200mm 12000 mm.
3. The heat treatment process for improving the impact power of the stainless steel cylinder for the oil field according to claim 1, which is characterized in that: the specification of the deep cooling furnace is 6500mm 1300 mm.
4. The heat treatment process for improving the impact power of the stainless steel cylinder for the oil field according to claim 1, which is characterized in that: in the step 2), when water cooling is carried out by a cooling water tank, the water temperature is controlled to be less than or equal to 25 ℃.
5. The heat treatment process for improving the impact power of the stainless steel cylinder for the oil field according to claim 1, which is characterized in that: in the step 2), when the cylinder body is placed in a cooling oil tank for oil cooling after the water cooling is finished, the oil temperature is controlled to be less than or equal to 70 ℃.
6. The heat treatment process for improving the impact power of the stainless steel cylinder for the oil field according to claim 1, which is characterized in that: the specification of the well type low-temperature heating furnace is phi 2200mm 12000 mm.
7. The heat treatment process for improving the impact power of the stainless steel cylinder for the oil field according to claim 1, which is characterized in that: the stainless steel cylinder body for the oil field is made of a 17-4PH material.
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| CN202010451309.8A CN111593186A (en) | 2020-05-25 | 2020-05-25 | Heat treatment process for improving impact power of stainless steel cylinder body for oil field |
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| CN202010451309.8A CN111593186A (en) | 2020-05-25 | 2020-05-25 | Heat treatment process for improving impact power of stainless steel cylinder body for oil field |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029524A (en) * | 2022-04-29 | 2022-09-09 | 沈阳鼓风机集团往复机有限公司 | Cryogenic treatment process for S51740 material |
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2020
- 2020-05-25 CN CN202010451309.8A patent/CN111593186A/en active Pending
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| JP2002332543A (en) * | 2001-03-07 | 2002-11-22 | Nisshin Steel Co Ltd | High strength stainless steel for metal gasket having excellent fatigue performance and high temperature setting resistance and production method therefor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029524A (en) * | 2022-04-29 | 2022-09-09 | 沈阳鼓风机集团往复机有限公司 | Cryogenic treatment process for S51740 material |
| CN115029524B (en) * | 2022-04-29 | 2024-01-19 | 沈阳鼓风机集团往复机有限公司 | Cryogenic treatment process for S51740 material |
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Application publication date: 20200828 |
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