CN109465610B - Process for manufacturing low-temperature die pressing tee joint by utilizing X80 steel plate - Google Patents
Process for manufacturing low-temperature die pressing tee joint by utilizing X80 steel plate Download PDFInfo
- Publication number
- CN109465610B CN109465610B CN201910022842.XA CN201910022842A CN109465610B CN 109465610 B CN109465610 B CN 109465610B CN 201910022842 A CN201910022842 A CN 201910022842A CN 109465610 B CN109465610 B CN 109465610B
- Authority
- CN
- China
- Prior art keywords
- temperature
- pipe fitting
- welding
- tee
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 20
- 239000010959 steel Substances 0.000 title claims abstract description 20
- 238000007723 die pressing method Methods 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000005496 tempering Methods 0.000 claims description 22
- 238000010791 quenching Methods 0.000 claims description 15
- 230000000171 quenching effect Effects 0.000 claims description 15
- 238000004321 preservation Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- 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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
-
- 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
-
- 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
-
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a process for manufacturing a low-temperature die pressing tee joint by utilizing an X80 steel plate, which combines a welding process and a press forming process by utilizing an X80 steel plate to prepare a tee joint pipe fitting, improves the loss allowance of grain size and strength caused by repeated heating and longer heating time in the processing process, can be normally used for a long time in extremely cold weather at minus 45 ℃, and the tee joint pipe fitting prepared by the process has the advantages of fine grain size, higher strength and lower welding crack sensitivity coefficient, greatly improves the homogeneity degree of each part of a product, and is suitable for the operating environment at minus 45 ℃.
Description
Technical Field
The invention relates to the technical field of processing of three-way pipes, in particular to a process for manufacturing a low-temperature die pressing tee joint by utilizing an X80 steel plate.
Background
In recent years, long-distance pipeline projects are designed and constructed in the direction of large output and low energy consumption along with the large domestic and foreign demand for natural gas as clean energy and strategic development and storage. The adoption of high-steel grade, large-caliber and high-pressure pipeline transportation has become a development trend of long-distance pipeline engineering construction. Meanwhile, the low temperature resistance of the pipeline material is improved, and the heat-preservation heat tracing facility of the pipeline in the alpine region is removed.
The high-steel-grade pipeline steel material is easy to have low-temperature brittle fracture after long-term bare pipe operation in an extreme low-temperature environment (45 ℃ below zero), and the high-steel-grade pipeline steel material is limited by an alloy system and a controlled rolling process, so that the realization of good toughness in the low-temperature environment has great technical difficulty. The large-caliber seamed tee joint has a plurality of quality risk points (due to the technical bottlenecks that the wall thickness difference of all parts of the whole large-caliber tee joint and the weld metal of a high-steel-grade product are sensitive to the hot processing temperature, the strength and the toughness have inverse proportional trend along with the temperature change and the like), and the large-caliber seamed tee joint is influenced by factors such as installation stress, operation stress, geological change and the like according to the service characteristics of the tee joint, so that the stress is complex, the final whole quality state of the tee joint needs to accurately meet the requirements of engineering standards, and the developed process and key nodes need to be capable of ensuring the quality stability after batch production so as to ensure the safe operation of application engineering.
In patent CN108239720A, a method for pressing a tee pipe fitting by using an X80 steel-grade plate is disclosed, wherein the pressing forming temperature is 900-.
How to improve homogeneity, strength, toughness and low temperature resistance of a molded tee joint is a problem to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a process for manufacturing a low-temperature die pressing tee joint by using an X80 steel plate. The process is used for preparing the homogeneous, high-strength and high-toughness three-way pipe fitting by using a technical means of combining welding and pressing.
The invention discloses a process for manufacturing a low-temperature die pressing tee joint by using an X80 steel plate, which comprises the following steps of:
selecting an X80 steel plate with the thickness of 58mm as a raw material;
cutting a raw material into rectangular blanks;
rolling the rectangular blank into a cylindrical blank, and welding longitudinal welding seams of the cylindrical blank;
carrying out first tempering treatment on the welded cylindrical blank, carrying out fixed point welding on a longitudinal welding line of the cylindrical blank, and then putting the cylindrical blank into a heat treatment furnace for tempering treatment to eliminate the rolling stress of the high-strength steel;
carrying out hot-press molding treatment on the blank subjected to the first tempering treatment, namely completing a tee joint molding procedure in a heating state according to the sequence of flattening, rounding, bulging, opening, drawing and rounding, wherein the heating temperature of hot-press molding is 910-930 ℃, and the heat preservation time is 72.5 min;
the method is similar to the method of carrying out sub-temperature quenching on each heating pass of the tee joint. And the pressing amount of each pass of the tee joint is strictly controlled to avoid the side surface of the tee joint from being concave or folded. The side mould of the branch pipe is arranged on the upper part during bulging, and the direction of the side mould is consistent with the heating direction of the pipe blank, so that repeated turning during tapping, quenching and entering the mould is avoided, the heat loss is reduced, the designed rolling quantity of each pass is ensured, and the rolling passes are reduced;
shaping and flattening the cooled tee pipe blank, then putting the tee pipe blank into a heat treatment furnace for quenching and secondary tempering process treatment, and completely dissolving all trace elements in crystals after the tee pipe blank is subjected to final quenching and secondary tempering heat treatment to form an ultrafine bainite structure so that the properties of the surfaces and the cores of the finished parent metal and the welding line are uniform. And thus obtaining a high-quality tee joint finished product which meets the standard and is suitable for being butted with a trunk pipeline, wherein the quenching temperature is 865-885 ℃, the heat preservation time is 50min, then the product is rapidly cooled to the room temperature, the second tempering treatment is carried out, the second tempering temperature is 640-660 ℃, the heat preservation time is 150min, and the product is discharged from the furnace for natural air cooling after the heat preservation is finished.
Preferably, the percentage of each element of the X80 steel is as follows: c0.06%, Mn 1.5%, Si 0.23%, Cr0.15%, Mo 0.39%, V0.037%, Ni 0.77%, Nb 0.045%, Cu 0.14%, and the balance of Fe and inevitable impurities, wherein non-metallic inclusions are less than or equal to 1.5 level, the grain size is more than or equal to 10 level, CE is more than or equal to 10 levelPcmIs 0.2%.
Preferably, the welding rod used for welding is E11016-G/L-80 SN.
Preferably, during welding treatment, the preheating temperature is 190-210 ℃, the interlayer temperature is less than or equal to 200 ℃, the welding current is controlled to be less than or equal to 180A, the welding speed is more than or equal to 18cm/min, the heat input is less than or equal to 20KJ/cm, and the deposited metal with good toughness is obtained by strictly controlling the heat input during welding. The problems of softening of welding seams and heat affected zones and formation of brittle tissues are solved. .
Preferably, the first tempering temperature is 740-760 ℃, and the treatment time is 145 min.
Preferably, when the tee pipe fitting is placed into a heat treatment furnace for quenching and secondary tempering process treatment, the tee pipe fitting is stacked in the heat treatment furnace in a single layer mode, so that a welding seam is in a horizontal position, and the interval between the tee pipes and the furnace wall and the furnace bottom is guaranteed to be larger than or equal to 300 mm.
Preferably, after quenching and heat preservation are finished, the three-way pipe fitting is rapidly put into water within 1 minute and continuously moves at a constant speed in a water pool, so that the whole pipe fitting is cooled to room temperature within 5 minutes, and good hardenability is achieved.
Compared with the prior art, the invention has the following beneficial effects: the three-way pipe fitting prepared by combining the welding process and the press forming process by using the X80 steel plate improves the loss allowance of grain size and strength caused by repeated heating and longer heating time in the processing process, can be normally used for a long time in extremely cold weather at minus 45 ℃, has fine grain size, higher strength and lower welding crack sensitivity coefficient, greatly improves the homogeneity degree of each part of the product, and is suitable for the operating environment at minus 45 ℃.
Drawings
FIG. 1 is a metallographic structure of a tee branch pipe prepared according to an embodiment of the invention;
FIG. 2 is a metallographic structure diagram of a main pipe of a tee pipe fitting prepared according to an embodiment of the invention;
FIG. 3 is a metallographic structure diagram of a weld of a tee fitting prepared according to an embodiment of the invention.
Detailed Description
The technical solution of the present invention is explained below with reference to the accompanying drawings and specific embodiments.
Examples
A process for manufacturing a low-temperature die pressing tee joint by using an X80 steel plate comprises the following steps:
selecting an X80 steel plate with the thickness of 58mm as a raw material, wherein the percentage of each element of the X80 steel material is as follows: c0.06%, Mn 1.5%, Si 0.23%, Cr 0.15%, Mo 0.39%, V0.037%, Ni 0.77%, Nb 0.045%, Cu 0.14%, and the balance of Fe and unavoidable impurities at level 1.5, the grain size is 10, and CE is grade 10Pcm0.2 percent;
cutting a raw material into rectangular blanks;
rolling a rectangular blank into a cylindrical blank, welding a longitudinal welding line of the cylindrical blank, wherein during welding treatment, the preheating temperature is 200 ℃, the interlayer temperature is 150 ℃, the welding current is controlled to be 150A, the welding speed is 20cm/min, the heat input is 18KJ/cm, and the model of the adopted welding rod is E11016-G/L-80 SN;
carrying out first tempering treatment on the welded cylindrical blank, wherein the tempering temperature is 750 ℃, and preserving heat for 145 min;
hot-pressing the blank subjected to the first tempering treatment to prepare a large-caliber three-way pipe fitting with the diameter of 1422 and 1422mm, wherein the heating temperature is 920 ℃, and the heat preservation time is 72.5 min;
the tee pipe blank formed by hot pressing is wholly immersed into a water tank to be cooled to room temperature;
shaping and leveling the cooled tee pipe blank, then placing the tee pipe blank into a heat treatment furnace for quenching and secondary tempering process treatment, namely placing the tee pipe fitting into the heat treatment furnace for quenching and secondary tempering process treatment, placing the tee pipe fitting into the heat treatment furnace in a single-layer stacking mode to enable a welding line to be in a horizontal position and ensure that the interval between the tee pipes and the furnace wall and the furnace bottom are larger than or equal to 300mm, preferably 350mm, the quenching temperature is 875 ℃, keeping the temperature for 50min, rapidly placing the tee pipe fitting into water within 1 min after quenching and heat preservation, enabling the tee pipe fitting to continuously move at a constant speed in a water pool, reducing the whole tee pipe fitting to room temperature within 5min to achieve good penetration, then carrying out secondary tempering treatment, keeping the temperature for 150min at 650 ℃, and taking the tee pipe fitting out of the furnace for natural air cooling after heat preservation. The specific data of the strength, elongation, hardness and grain size of the branch pipe, the main pipe and the weld zone of the tee pipe fitting are shown in table 1.
TABLE 1
| Tensile strength | Yield strength | Elongation percentage | Hardness (HV10) | Grain size | |
| Branch pipe | 725MPa | 625MPa | 25％ | 250 | 11 stage |
| Main pipe | 721MPa | 628MPa | 25％ | 245 | 11 stage |
| Weld seam | 730MPa | 620MPa | 25％ | 248 | 11 stage |
Fig. 1-3 are metallographic structure diagrams of branch pipes, main pipes and welding seams of the tee pipe fitting prepared by the embodiment of the invention, and it can be seen that the tee pipe fitting prepared by the invention has the same structure, and the welding seam area is also homogenized after being processed, so that the service life of the tee pipe fitting is greatly prolonged.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (1)
1. A process for manufacturing a low-temperature die pressing tee joint by using an X80 steel plate is characterized by comprising the following steps of:
selecting an X80 steel plate with the thickness of 58mm as a raw material, wherein the percentage of each element of the X80 steel plate is as follows: 0.06% of C, 1.5% of Mn1, 0.23% of Si, 0.15% of Cr, 0.39% of Mo, 0.037% of V, 0.77% of Ni, 0.045% of Nb, 0.14% of Cu, 1.5 grades of Fe and inevitable impurities as the balance, 10 grades of grain size, CE and the likePcm0.2 percent;
cutting a raw material into rectangular blanks;
rolling a rectangular blank into a cylindrical blank, welding a longitudinal welding line of the cylindrical blank, wherein during welding treatment, the preheating temperature is 200 ℃, the interlayer temperature is 150 ℃, the welding current is controlled to be 150A, the welding speed is 20cm/min, the heat input is 18KJ/cm, and the model of the adopted welding rod is E11016-G/L-80 SN;
carrying out first tempering treatment on the welded cylindrical blank, wherein the tempering temperature is 750 ℃, and preserving heat for 145 min;
carrying out hot-press molding treatment on the blank subjected to the first tempering treatment to prepare a large-caliber three-way pipe fitting with the diameter of 1422 and 1422mm, wherein the heating temperature is 920 ℃, and the heat preservation time is 72.5 min;
the tee pipe blank formed by hot pressing is wholly immersed into a water tank to be cooled to room temperature;
shaping and flattening the cooled tee pipe blank, then putting the tee pipe blank into a heat treatment furnace for quenching and secondary tempering process treatment, namely, when the tee pipe fitting is put into a heat treatment furnace for quenching and secondary tempering process treatment, the tee pipe fitting is stacked in the heat treatment furnace in a single layer mode, so that a welding seam is in a horizontal position, the interval between the tee joints and the space between the tee joints and the furnace wall and the furnace bottom are ensured to be 350mm, the quenching temperature is 875 ℃, the heat preservation time is 50min, the tee pipe fitting is rapidly put into water within 1 min after the quenching and heat preservation are finished, and continuously moving at a constant speed in a water tank to reduce the whole pipe fitting to room temperature within 5 minutes to achieve good hardenability, then carrying out secondary tempering treatment, wherein the secondary tempering temperature is 650 ℃, the heat preservation time is 150min, discharging from a furnace after the heat preservation is finished, and naturally cooling to obtain the three-way pipe fitting suitable for being used in an environment at the temperature of-45 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910022842.XA CN109465610B (en) | 2019-01-10 | 2019-01-10 | Process for manufacturing low-temperature die pressing tee joint by utilizing X80 steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910022842.XA CN109465610B (en) | 2019-01-10 | 2019-01-10 | Process for manufacturing low-temperature die pressing tee joint by utilizing X80 steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109465610A CN109465610A (en) | 2019-03-15 |
| CN109465610B true CN109465610B (en) | 2020-04-17 |
Family
ID=65678344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910022842.XA Active CN109465610B (en) | 2019-01-10 | 2019-01-10 | Process for manufacturing low-temperature die pressing tee joint by utilizing X80 steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109465610B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110842484A (en) * | 2019-11-28 | 2020-02-28 | 河北恒通管件集团有限公司 | Process for manufacturing hot-pressing low-temperature tee joint by utilizing X60 steel plate |
| CN116900643A (en) * | 2019-11-28 | 2023-10-20 | 河北恒通管件集团有限公司 | Method for manufacturing hot-pressing low-temperature tee joint by utilizing X70 steel plate |
| NL2032609B1 (en) * | 2022-07-27 | 2024-02-05 | Hebei Hengtong Pipe Fittings Group Co Ltd | Preparation method of x80 grade steel plate hot extrusion elbow |
| NL2032614B1 (en) * | 2022-07-27 | 2024-02-05 | Hebei Hengtong Pipe Fittings Group Co Ltd | Process for manufacturing low-temperature die-pressing tee joint by x80 steel plate |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001012375A1 (en) * | 1999-08-12 | 2001-02-22 | Nippon Steel Corporation | HIGH-STRENGTH α + β TYPE TITANIUM ALLOY TUBE AND PRODUCTION METHOD THEREFOR |
| CN102189377B (en) * | 2011-03-23 | 2013-01-30 | 河北宇鹏重工管道装备制造有限公司 | Manufacture process of X100 steel-grade steel plate hot-press bend |
| CN102139438B (en) * | 2011-03-23 | 2013-04-17 | 河北省沧州恒通管件制造有限公司 | Process for manufacturing hot pressing tee joint by using X100 steel plate |
| CN102152076B (en) * | 2011-03-23 | 2013-01-30 | 河北宇鹏重工管道装备制造有限公司 | Process method for manufacturing hot-pressing thick-wall tee joint by performing automatic submerged arc welding on X80-grade steel plate |
| CN105081005B (en) * | 2014-05-21 | 2017-03-01 | 河北宇鹏重工管道装备制造有限公司 | The manufacturing process of X80 steel-grade DN1400 heavy wall threeway |
| CN105965212B (en) * | 2016-06-24 | 2018-04-20 | 河北宇鹏重工管道装备制造有限公司 | A kind of bimetallic clad steel plate threeway method of manufacturing technology |
-
2019
- 2019-01-10 CN CN201910022842.XA patent/CN109465610B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109465610A (en) | 2019-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109465610B (en) | Process for manufacturing low-temperature die pressing tee joint by utilizing X80 steel plate | |
| CN104532143B (en) | A kind of mining big specification, high-test chain steel and preparation method thereof | |
| CN103276314B (en) | X80 pipeline steel plate with low yield ratio and high toughness and manufacturing method thereof | |
| CN101864542B (en) | Steel for high-frequency resistance straight weld oil well pipe and production method thereof | |
| CN107502822B (en) | High anti-jamming SEW petroleum casing pipe hot continuous rolling coil of strip and its production method | |
| CN107937802A (en) | 60 80mm thickness low-crackle sensitives, easy weld-end fittings steel plate and its manufacture method used under a kind of cryogenic conditions | |
| CN104250713B (en) | X80-grade large-deformation-resistant pipeline steel plate and manufacturing method thereof | |
| CN105057356A (en) | Process for producing screw-thread steel through two-stage rolling control and after-rolling cooling control | |
| CN103627980A (en) | Low-temperature X80HD (High Density) large-deformation pipeline steel with great wall thickness and production method thereof | |
| CN104307890A (en) | Combined controlled rolling and cooling production technology of HRB400 hot rolled ribbed steel bars | |
| CN104141099B (en) | A kind of manufacture method of super thick specification X70 hot-rolled sheet coil | |
| CN105112815B (en) | Super-thick pipeline steel plate with excellent low-temperature toughness and production method | |
| CN106435379A (en) | 550 MPa level extra-thick easy-welding high-toughness layered-tearing-resisting steel plate and manufacturing method thereof | |
| CN110453157A (en) | A kind of manufacturing method of low yield strength ratio thin gauge pipe line steel | |
| CN113549824A (en) | Hot continuous rolling limit thickness specification high-strength pipeline steel plate coil and manufacturing method thereof | |
| CN115558860A (en) | Welding wire for high-strength steel containing vanadium and niobium, welding wire for high-strength steel and production method of welding wire | |
| CN105886912B (en) | A kind of low compression ratio think gauge X70 levels steel for gas delivering pipeline and production method | |
| CN115502609A (en) | Niobium-titanium-containing welding wire steel for high-strength steel welding wire for water and high-strength steel and production method thereof | |
| CN102974987A (en) | Large-diameter thin-wall T250 steel pressure vessel vacuum electronic beam welding manufacturing method | |
| CN101633976A (en) | Direct quenching technology suitable for steel plates with different thicknesses and high durability | |
| CN102191430A (en) | Easy welding steel plate with yield strength of 550MPa and high toughness and manufacturing method thereof | |
| CN102189377B (en) | Manufacture process of X100 steel-grade steel plate hot-press bend | |
| CN112371753B (en) | Processing technology of hydrogen high-pressure large-caliber thick-wall nickel alloy pipe fitting | |
| CN104073744B (en) | The high tenacity X80 pipe line steel coiled sheet of thickness >=18.5mm and production method | |
| CN101760702A (en) | High-strength anti-fatigue atmospheric corrosion resistant hot-rolled steel strip and method for producing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200310 Address after: 061300, Han village, Han Town, Yanshan County, Hebei, Cangzhou Applicant after: Hebei Hengtong Pipe Fittings Group Co.,Ltd. Address before: 061300, Yanshan Cangzhou County Hebei Port Industrial Park Applicant before: HEBEI YUPENG HEAVY INDUSTRY TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A process for manufacturing low-temperature molded tees using X80 steel plate Granted publication date: 20200417 Pledgee: Bank of China Limited by Share Ltd. Cangzhou branch Pledgor: Hebei Hengtong Pipe Fittings Group Co.,Ltd. Registration number: Y2024980035567 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |