CN117907103A - LCC steel production process and test device for low-temperature high-strength and high-toughness valve body - Google Patents
LCC steel production process and test device for low-temperature high-strength and high-toughness valve body Download PDFInfo
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- CN117907103A CN117907103A CN202311750648.6A CN202311750648A CN117907103A CN 117907103 A CN117907103 A CN 117907103A CN 202311750648 A CN202311750648 A CN 202311750648A CN 117907103 A CN117907103 A CN 117907103A
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- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 29
- 239000010959 steel Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 50
- 238000009864 tensile test Methods 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000009863 impact test Methods 0.000 claims description 6
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000007542 hardness measurement Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
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- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a high tough LCC steel test device for valve body of low temperature, including placing the platform, the bottom surface four corners of placing the platform sets up the landing leg respectively, places the bench and sets up the protective housing that can relative movement, places the rear of platform and sets up the regulating plate that can rotate, sets up the connecting rod group respectively around the regulating plate, need not in addition like current experiment because of equipment is not in a room, need carry the sample and remove in a plurality of rooms, at the removal in-process, if the sample bumps or drops, the sample has the inaccurate condition of data in the detection, avoids the product rate to reduce.
Description
Technical Field
The invention belongs to the technical field of steel preparation equipment, and particularly relates to a production process and a test device of LCC steel for a low-temperature high-strength and high-toughness valve body.
Background
After steel comes out, need test the product, and present test equipment places in a plurality of laboratories, needs each laboratory of user carrying sample to walk, and carries the sample to walk the in-process, bumps, and the sample can cause the influence to the test, causes the experimental data inaccuracy of product easily to in-service use has the problem.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a production process and a test device of LCC steel for a low-temperature high-strength and high-toughness valve body.
The application provides an LCC steel test device for a low-temperature high-strength and high-toughness valve body, which comprises a placing table, wherein four corners of the bottom surface of the placing table are respectively provided with supporting legs, a protective shell capable of relatively moving is arranged on the placing table, a rotatable adjusting plate is arranged at the rear of the placing table, connecting rod groups are respectively arranged at the periphery of the adjusting plate, a tensile test mechanism is arranged on the connecting rod group positioned at the front, a bending test mechanism is arranged on the connecting rod group positioned at the right, a pendulum impact test machine is arranged on the connecting rod group positioned at the left, and a hardness tester is arranged on the connecting rod group positioned at the rear.
Specifically, tensile test mechanism include the riser, the front end of riser be connected with connecting rod group, the preceding both sides of riser set up the fixed plate respectively, the cooperation sets up two sets of screw rod groups between two fixed plates, two sets of screw rod groups are distributed around, every set of screw rod group comprises two screw rods that the screw thread is opposite, two nuts, the connecting block is located between two screw rods and is connected with the screw rod, screw rod and nut screw-thread fit, the opposite ends of two screw rods respectively with the medial surface swing joint of fixed plate, be connected through fixture between two nuts around being located in same one side, be connected through first coupling mechanism between two sets of screw rod groups.
Specifically, fixture include first grip block, first grip block is connected with two nuts that are in same one side and arrange around respectively, the screw is seted up respectively to both ends around the top of first grip block, the below of first grip block sets up the second grip block, both ends are movable respectively around the top of second grip block sets up first threaded rod, the top of first threaded rod passes corresponding screw.
Specifically, the first connecting mechanism comprises two first chain wheels which are arranged front and back, each first chain wheel is arranged on one screw rod of each screw rod group, and the two first chain wheels are connected through a chain.
Specifically, the bending test mechanism include the bottom plate, both ends are movable respectively around one side top surface of bottom plate set up the lead screw, connect through second coupling mechanism between two lead screws, bottom plate top surface middle part sets up the montant, the montant top sets up the supporting shoe, both ends set up the movable block respectively around the bottom plate top surface, screw hole is seted up to one side top surface of movable block, the lead screw passes the screw hole that corresponds, both ends set up the guide bar respectively around the opposite side top surface of bottom plate, the guiding hole is seted up to the opposite side top surface of movable block, the guide bar passes the guiding hole that corresponds.
Specifically, the second connecting mechanism comprises two second chain wheels, the second chain wheels are arranged at the bottom end of the screw rod, and the two second chain wheels are movably connected through a chain.
Specifically, the inside of placing the platform set up the cavity, the middle part sets up biax motor in the cavity, the both sides output shaft of biax motor all sets up the second threaded rod, sets up two long laths in the cavity, the screw hole is seted up respectively to the opposite face of two long laths, the second threaded rod inserts to the screw hole that corresponds, the opposite ends top of two long laths sets up respectively and props up the piece, prop up the piece and be located the outside of placing the platform, prop up the top of piece and be connected with the bottom of protective housing.
The LCC steel production process for the low-temperature high-strength and high-toughness valve body comprises the steps of performing first heating, descaling before rough rolling, second heating, descaling before finish rolling and finish rolling on a casting blank to obtain a hot rolled coil; performing laminar cooling on the hot rolled coil, and then coiling to obtain low-temperature rolled low-carbon steel; wherein the temperature difference before and after the first heating is less than 230 ℃ and the temperature difference before and after the second heating is less than 90 ℃.
Compared with the prior art, the invention has the following beneficial effects:
After LCC steel is produced, a sample is selected, then the sample is placed on a placing table for testing, then an adjusting plate is rotated, as shown in the figure, a tensile test mechanism is rotated on the placing table, then the sample is fixed in the tensile test mechanism, then two protective shells are moved relatively, the tensile test mechanism is covered, the tensile test mechanism carries out tensile test on the sample, the yield strength, the tensile strength and the like of steel are measured, then the two protective shells are moved in opposite directions, the tensile test mechanism is exposed, the adjusting plate is rotated clockwise for 90 degrees, the bending test mechanism is rotated on the placing table, then a new sample is placed in the bending test mechanism, the two protective shells are moved relatively again, the bending test mechanism is covered, then the bending performance of the sample is evaluated through the bending test mechanism, after the test is finished, the two protective shells are opened again, the adjusting plate is rotated clockwise for 90 degrees, the sclerometer is moved on the placing table, the sample is subjected to hardness test through the sclerometer, the adjusting plate is rotated clockwise for 90 degrees again, the pendulum impact tester is moved on the placing table, and the sample is subjected to toughness evaluation through the pendulum impact tester; according to the invention, the sample can be tested on one device, the walking is not needed, the time is saved, and the sample is required to be carried to move in a plurality of houses because the device is not located in one house like the existing test, and in the moving process, if the sample collides or falls, the sample has inaccurate data in the detection, so that the reduction of the product rate is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention; FIG. 2 is a top view of FIG. 1; FIG. 3 is a view in the A direction of FIG. 2; fig. 4 is an enlarged view of the B-direction view of fig. 2.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The utility model provides a low temperature high strength and toughness LCC steel test device for valve body, as shown in fig. 1-4, including placing platform 1, place the bottom surface four corners of platform 1 and set up the landing leg respectively, place and set up protective housing 2 that can relative movement on platform 1, the recess is seted up to protective housing 2's rear end bottom, the opening of two recesses is relative, not shown in the figure, in two protective housing 2 relative movement in-process, the connecting rod group gets into the recess, avoid the protective housing to take place the card phenomenon of dying at the removal in-process, place the rear of platform 1 and set up can pivoted regulating plate 3, regulating plate 3 rotates through the drive of rotating equipment, for example, the bottom of regulating plate 3 sets up the rotation axis, the rotation axis is installed on rotating electrical machines's output shaft, set up the connecting rod group respectively around regulating plate 3, the connecting rod group that is located the place ahead sets up tensile test mechanism, the connecting rod group that is located the right side sets up bending test mechanism, the connecting rod group that is located the left sets up pendulum impact test machine, the connecting rod group that is located the rear sets up the sclerometer. The pendulum impact testing machine and the hardness tester are both made of the existing known mechanisms, so that detailed description is not needed, after LCC steel is produced, a sample is selected, then the sample is placed on the placing table 1 for testing, then the adjusting plate 3 rotates, as shown in fig. 2, the tensile testing mechanism rotates on the placing table, then the sample is fixed in the tensile testing mechanism, then the two protecting shells 2 relatively move, the tensile testing mechanism covers the tensile testing mechanism, the tensile testing mechanism performs tensile testing on the sample, the yield strength, the tensile strength and the like of steel are measured, then the two protecting shells 2 move in opposite directions, the tensile testing mechanism is exposed, the adjusting plate 3 rotates clockwise for 90 degrees, the bending testing mechanism rotates on the placing table 1, then a new sample is placed in the bending testing mechanism, the two protecting shells 2 relatively move again, the bending testing mechanism covers the bending testing mechanism, after the testing is finished, the two protecting shells are opened again, the adjusting plate 3 continuously rotates clockwise for 90 degrees, the hardness tester moves on the placing table, the hardness testing mechanism performs hardness testing on the sample through the hardness hammer, the adjusting plate 3 rotates clockwise for 90 degrees again, and the impact testing machine is placed on the pendulum impact testing machine for testing; according to the application, the sample can be tested on one device, the walking is not needed, the time is saved, and the sample is required to be carried to move in a plurality of houses because the device is not located in one house like the existing test, and in the moving process, if the sample collides or falls, the sample has inaccurate data in the detection, so that the reduction of the product rate is avoided.
Specifically, the tensile test mechanism of this embodiment include riser 4, the front end of riser 4 is connected with the front end of connecting rod group, the preceding both sides of riser 4 set up fixed plate 5 respectively, the cooperation sets up two sets of screw rod groups between two fixed plates 5, two sets of screw rod groups distribute around, every screw rod group comprises screw rod 6, two nuts, the connecting block that the screw rod is opposite of two screw threads, the connecting block is located between two screw rods 6 and is connected with the screw rod, screw rod and nut screw-thread fit, the opposite ends of two screw rods 6 are connected with the medial surface swing joint of fixed plate 5 respectively, be located between two nuts around the same one side through fixture, be connected through first coupling mechanism between two sets of screw rod groups. Wherein a set of screw rod group has the motor, and the motor is installed on the medial surface of one of them fixed plate 5, and motor drives two screw rods 6 in a set of screw rod group and rotates in step, and through first coupling mechanism, can drive two screw rod group synchronous rotation, two screw rod screw threads in every set of screw rod group are opposite, and the nut is connected with fixture, and then can control two fixture to remove to opposite direction, two fixture clamp both ends of steel promptly, carry out tensile with the steel, accomplish the tensile test to the steel.
Further, the fixture of this embodiment includes first grip block 7, and first grip block 7 is connected with two nuts that are in same side and front and back range respectively, and screw is seted up respectively to both ends around the top of first grip block 7, and the below of first grip block 7 sets up second grip block 8, and both ends are movable respectively to set up first threaded rod 9 around the top of second grip block 8, and the top of first threaded rod 9 passes corresponding screw. Place the tip of steel between first grip block 7 and the second grip block 8, then rotate first threaded rod 9, first threaded rod 9 upwards moves under the cooperation of screw, drives the upwards removal of second grip block 8, with steel centre gripping, through the adjustment of the distance between first grip block and the second grip block, can satisfy the steel of co-altitude and carry out tensile test, can obtain more data.
Still further, the first connection mechanism according to this embodiment includes two first sprockets 10 arranged in tandem, each first sprocket 10 is mounted on one of the screws of each screw set, and the two first sprockets 10 are connected by a chain. By arranging each first chain wheel 10 in one screw group, the two screw groups can be connected, so that the two screw groups synchronously rotate, and further the two clamping mechanisms are controlled to move relatively or move in opposite directions.
Still further, the bending test mechanism in this embodiment includes bottom plate 11, both ends are movable respectively around the top surface of one side of bottom plate 11 set up lead screw 12, connect through second coupling mechanism between two lead screws 12, bottom plate 11 top surface middle part sets up the montant, the montant top sets up supporting shoe 13, both ends set up movable block 14 respectively around the top surface of bottom plate 11, the screw hole is seted up to the top surface of one side of movable block 14, screw 12 passes corresponding screw hole, both ends set up guide bar 15 respectively around the top surface of the opposite side of bottom plate 11, the guide hole is seted up to the opposite side top surface of movable block 14, the guide bar passes corresponding guide hole. One of the screw rods 12 is provided with a motor, the shape of the moving blocks is shown in fig. 3, the heights of the two moving blocks 14 are lower than the height of the supporting block 13 at the beginning, two ends of a sample are respectively placed on the two moving blocks 14, the middle of the sample is positioned below the supporting block 13, then the screw rods with the motor start to rotate, the two screw rods synchronously rotate through the connection of the second connecting mechanism, then the moving blocks can be limited through the cooperation of the guide rods and the guide holes, the two moving blocks 14 are controlled to move upwards, the two ends of the sample are pushed upwards, and the sample is subjected to a bending test.
Still further, the second connection mechanism in this embodiment includes two second sprockets 16, the second sprockets 16 are mounted at the bottom ends of the screw rods, and the two second sprockets are movably connected by a chain. Through the connection of second sprocket and chain, can connect two lead screws, two lead screws can carry out synchronous rotation promptly.
Further, in this embodiment, the cavity 17 is provided in the interior of the placement table 1, a dual-shaft motor is disposed in the middle of the cavity 17, two output shafts on two sides of the dual-shaft motor are both provided with a second threaded rod 18, two long strips 19 are disposed in the cavity 17, opposite surfaces of the two long strips 19 are respectively provided with threaded holes, the second threaded rod 18 is inserted into the corresponding threaded holes, supporting blocks are respectively disposed at top parts of opposite ends of the two long strips 19, the supporting blocks are located outside the placement table 1, and top ends of the supporting blocks are connected with bottom ends of the protective shell 2. When the protective housing needs to be opened, biax motor work drives two second threaded rods 18 and rotates, and slat 19 is located cavity 17, and upper and lower both ends of slat are respectively with the upper and lower both ends inner wall contact of cavity, inject slat 19, control two slat 19 and remove to opposite direction, through the connection of a piece, drive two protective housing 2 and remove to opposite direction, and the protective housing is opened, and when the protective housing was closed, reverse operation above-mentioned step can be closed two protective housings, avoids in the test process, and the sample fracture splashes everywhere.
The LCC steel production process for the low-temperature high-strength and high-toughness valve body comprises the steps of performing first heating, descaling before rough rolling, second heating, descaling before finish rolling and finish rolling on a casting blank to obtain a hot rolled coil; performing laminar cooling on the hot rolled coil, and then coiling to obtain low-temperature rolled low-carbon steel; wherein the temperature difference before and after the first heating is less than 230 ℃ and the temperature difference before and after the second heating is less than 90 ℃.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. LCC steel test device for high strength and toughness valve body of low temperature, its characterized in that: including placing platform (1), the bottom surface four corners of placing platform (1) sets up the landing leg respectively, places and sets up protective housing (2) that can relative movement on platform (1), places the rear of platform (1) and sets up adjusting plate (3) that can rotate, sets up the connecting rod group respectively around adjusting plate (3), and the connecting rod group that is located the place ahead sets up tensile test mechanism, and the connecting rod group that is located the right side sets up bending test mechanism, and the connecting rod group that is located the left side sets up pendulum impact test machine, and the connecting rod group that is located the rear sets up the sclerometer.
2. The LCC steel testing apparatus for low temperature high strength and toughness valve body according to claim 1, wherein: the tensile test mechanism comprises a vertical plate (4), the rear face of the vertical plate (4) is connected with the front end of a connecting rod group, two sides of the front face of the vertical plate (4) are respectively provided with a fixed plate (5), two screw rod groups are matched between the two fixed plates (5), the two screw rod groups are distributed front and back, each screw rod group consists of two screws (6) with opposite threads, two nuts and a connecting block, the connecting block is located between the two screws (6) and is connected with the screws, the screws are in threaded fit with the nuts, the opposite ends of the two screws (6) are respectively movably connected with the inner side faces of the fixed plates (5), the front nuts and the rear nuts which are located on the same side are connected through a clamping mechanism, and the two screw rod groups are connected through a first connecting mechanism.
3. The LCC steel testing apparatus for low temperature high strength and toughness valve body according to claim 2, wherein: the clamping mechanism comprises a first clamping plate (7), the first clamping plate (7) is respectively connected with two nuts which are arranged on the same side and front and back, screw holes are respectively formed in the front and back ends of the top surface of the first clamping plate (7), a second clamping plate (8) is arranged below the first clamping plate (7), first threaded rods (9) are respectively movably arranged in the front and back ends of the top surface of the second clamping plate (8), and the top ends of the first threaded rods (9) penetrate through the corresponding screw holes.
4. The LCC steel testing apparatus for low temperature high strength and toughness valve body according to claim 2, wherein: the first connecting mechanism comprises two first chain wheels (10) which are arranged front and back, each first chain wheel (10) is arranged on one screw rod of each screw rod group, and the two first chain wheels (10) are connected through a chain.
5. The LCC steel test device for the low-temperature high-strength and high-toughness valve body according to claim 1 is characterized in that: the bending test mechanism comprises a bottom plate (11), screw rods (12) are movably arranged at the front end and the rear end of the top surface of one side of the bottom plate (11) respectively, two screw rods (12) are connected through a second connecting mechanism, a vertical rod is arranged in the middle of the top surface of the bottom plate (11), supporting blocks (13) are arranged at the top of the vertical rod, movable blocks (14) are arranged at the front end and the rear end of the top surface of the bottom plate (11) respectively, threaded holes are formed in the top surface of one side of the movable blocks (14), the screw rods (12) penetrate through the corresponding threaded holes, guide rods (15) are arranged at the front end and the rear end of the top surface of the other side of the bottom plate (11) respectively, guide holes are formed in the top surface of the other side of the movable blocks (14), and the guide rods penetrate through the corresponding guide holes.
6. The LCC steel test device for the low-temperature high-strength and high-toughness valve body, which is characterized in that: the second connecting mechanism comprises two second chain wheels (16), the second chain wheels (16) are arranged at the bottom end of the screw rod, and the two second chain wheels are movably connected through a chain.
7. The LCC steel testing apparatus for low temperature high strength and toughness valve body according to claim 1, wherein: the utility model discloses a stand, including placing platform (1) and support, cavity (17) are offered to the inside of placing platform (1), the middle part sets up biax motor in cavity (17), the both sides output shaft of biax motor all sets up second threaded rod (18), set up two long laths (19) in cavity (17), the screw hole is offered respectively to the opposite face of two long laths (19), second threaded rod (18) insert to the screw hole that corresponds, the opposite ends top of two long laths (19) sets up the piece respectively, the piece is located the outside of placing platform (1), the top of piece is connected with the bottom of protective housing (2).
8. A production process of LCC steel for a low-temperature high-strength and high-toughness valve body is characterized by comprising the following steps of: the method comprises the steps of performing first heating, descaling before rough rolling, second heating, descaling before finish rolling and finish rolling on a casting blank to obtain a hot rolled coil; performing laminar cooling on the hot rolled coil, and then coiling to obtain low-temperature rolled low-carbon steel; wherein the temperature difference before and after the first heating is less than 230 ℃ and the temperature difference before and after the second heating is less than 90 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311750648.6A CN117907103A (en) | 2023-12-19 | 2023-12-19 | LCC steel production process and test device for low-temperature high-strength and high-toughness valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311750648.6A CN117907103A (en) | 2023-12-19 | 2023-12-19 | LCC steel production process and test device for low-temperature high-strength and high-toughness valve body |
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| CN117907103A true CN117907103A (en) | 2024-04-19 |
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| CN202311750648.6A Pending CN117907103A (en) | 2023-12-19 | 2023-12-19 | LCC steel production process and test device for low-temperature high-strength and high-toughness valve body |
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| CN (1) | CN117907103A (en) |
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