CN104328352B - A kind of high-strength prestressed steel wire and its heat treatment method - Google Patents
A kind of high-strength prestressed steel wire and its heat treatment method Download PDFInfo
- Publication number
- CN104328352B CN104328352B CN201410622162.9A CN201410622162A CN104328352B CN 104328352 B CN104328352 B CN 104328352B CN 201410622162 A CN201410622162 A CN 201410622162A CN 104328352 B CN104328352 B CN 104328352B
- Authority
- CN
- China
- Prior art keywords
- cooled
- incubated
- temperature
- steel wire
- room temperature
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a kind of high-strength prestressed steel wire and its heat treatment method, a kind of high-strength prestressed steel wire, chemical analysis are by mass percentage：C：0.56 0.58%, Ni：3.6 3.8%, Cr：7.4 7.8%, Si：2.55 2.58%, Mn：1.26 1.28%, Cu：1.85 1.92%, V：4.23 4.25%, Mo：4.12 4.15%, P：0.02 0.05%, W：0.12 0.15%, compound rare-earth：2.32 2.35%, balance of Fe；Not only intensity is high for this high-strength prestressed steel wire and its heat treatment method, long service life, low production cost, Technology for Heating Processing is simple, improves its corrosion-resistant, rub resistance and service life, high working efficiency, the quantity that steel wire can be reduced in redesigning just can reach its design requirement, cost-effective.
Description
Technical field
The present invention relates to compressor wire, specifically a kind of high-strength prestressed steel wire and its heat treatment method.
Background technology
Compressor wire due to having high intensity, becomes bridge, the important materials in railway construction, and the intensity of compressor wire is straight
Connect the quality having influence on whole engineering, be directly connected to bridge, the key issue in railway construction and its life-span of using, existing
Technology in reach design strength by increasing its quantity, significantly waste resource, increased production cost, and steel wire is deposited
Corrode easy, the serious problems such as service life is short.
Content of the invention
The technical problem to be solved is, for the shortcoming of above prior art, proposes a kind of high-strength prestressed steel wire
And its heat treatment method, not only intensity is high for this high-strength prestressed steel wire, long service life, low production cost, Technology for Heating Processing
Simply, improve its corrosion-resistant, rub resistance and service life, can reduce in redesigning steel wire quantity just can reach its design will
Ask, cost-effective, and reduce the complexity of structure, and facilitate workman to construct, high working efficiency, safe, quality is steady
Fixed.
In order to solve above-mentioned technical problem, the technical scheme is that and be accomplished by：A kind of high-strength prestress
Steel wire, chemical analysis are by mass percentage：C：0.56-0.58%, Ni：3.6-3.8%, Cr：7.4-7.8%, Si：2.55-2.58%,
Mn：1.26-1.28%, Cu：1.85-1.92%, V：4.23-4.25%, Mo：4.12-4.15%, P：0.02-0.05%, W：
0.12-0.15%, compound rare-earth：2.32-2.35%, balance of Fe；
Compound rare-earth is by mass percentage：Gd：21.5-21.8%, Pr：6.25-6.28%, Er：11.2-11.5%, Ho：
10.8-11.2%, Nd：8.2-8.5%, Sm：12.7-12.9%, Tb：22.3-22.5%, balance of La.
Present invention also offers a kind of heat treatment method of high-strength prestressed steel wire, the method is carried out according to the following steps：
Step (1)：Using ultrasonic cleaner, the Steel Wire Surface after cooling is carried out, first puts into steel wire in intermediate frequency furnace and add
Heat, to 760-780 DEG C, is incubated 5-8h, after being then placed in soaking 20-30min in oil cooling pond, using double normalizing+return twice
Fire, first time normalizing：Temperature, at 725-730 DEG C, is incubated 6-8min to after temperature, is then air cooled to room temperature, then carries out second
Normalizing：Temperature, at 780-785 DEG C, is incubated 10-13min, then with the speed water-cooled of 10-15 DEG C/s to room temperature to after temperature；So
It is tempered for the first time afterwards：Heating-up temperature is 850-860 DEG C, is incubated 10-12min, carries out second after being then air cooled to room temperature to after temperature
Secondary tempering；Heating-up temperature is 930-935 DEG C, is incubated 18-22min, with the speed oil cooling of 8-12 DEG C/s to room temperature to after temperature；
Step (2)：First by steel wire heating to 880-890 DEG C, it is incubated 45-55min, then adopt the side that oil cooling and water-cooled combine
Method, is first cooled to 710-715 DEG C with oil cooling with the speed of 11-13 DEG C/s, then is cooled to room with water-cooled with 10-15 DEG C/s speed
Temperature, steel wire heating to 538-545 DEG C is incubated 30-40min, is then cooled to room temperature with water-cooled with the speed of 12-15 DEG C/s,
Then it is heated to 850-860 DEG C, with oil cooling room temperature is cooled to 13-16 DEG C/s；
Step (3)：Steel wire is put in vacuum drying oven, is first heated to 1100-1150 DEG C with the speed of 22-24 DEG C/s, be incubated 4-8h,
Then whole adopt nitrogen flushing air cooling, speed is 12-15 DEG C/s, is cooled to 680-690 DEG C, is incubated 35-45min, then with
10-15 DEG C/s speed is cooled to 360-370 DEG C, is incubated 30-35min, then again temperature is heated to 850-860 DEG C, insulation
1-2h, is finally air cooled to room temperature, steel wire heat is arrived 980-985 DEG C, is incubated 5-8h, then water-cooled is cold with the speed of 15-18 DEG C/s
But to room temperature；
Step (4)：It is then placed in drying oven, baking temperature is 160-180 DEG C, drying time is 5-8h, is then air cooled to
Room temperature, defect detecting test and inspection size.
The technical scheme that the present invention limits further is：
Aforesaid high-strength prestressed steel wire, chemical analysis are by mass percentage：C：0.56%, Ni：3.6%, Cr：7.4%,
Si：2.55%, Mn：1.26%, Cu：1.85%, V：4.23%, Mo：4.12%, P：0.02%, W：0.12%, it is combined dilute
Soil：2.32%, balance of Fe；Compound rare-earth is by mass percentage：Gd：21.5%, Pr：6.25%, Er：11.2%, Ho：
10.8%, Nd：8.2%, Sm：12.7%, Tb：22.3%, balance of La.
Aforesaid high-strength prestressed steel wire, chemical analysis are by mass percentage：C：0.58%, Ni：3.8%, Cr：7.8%,
Si：2.58%, Mn：1.28%, Cu：1.92%, V：4.25%, Mo：4.15%, P：0.05%, W：0.15%, it is combined dilute
Soil：2.35%, balance of Fe；Compound rare-earth is by mass percentage：Gd：21.8%, Pr：6.28%, Er：11.5%, Ho：
11.2%, Nd：8.5%, Sm：12.9%, Tb：22.5%, balance of La.
Aforesaid high-strength prestressed steel wire, chemical analysis are by mass percentage：C：0.57%, Ni：3.7%, Cr：7.5%,
Si：2.57%, Mn：1.27%, Cu：1.88%, V：4.24%, Mo：4.13%, P：0.04%, W：0.13%, it is combined dilute
Soil：2.34%, balance of Fe；Compound rare-earth is by mass percentage：Gd：21.6%, Pr：6.26%, Er：11.4%, Ho：
10.9%, Nd：8.4%, Sm：12.8%, Tb：22.4%, balance of La.
The heat treatment method of aforesaid high-strength prestressed steel wire, the method is carried out according to the following steps：
Step (1)：Using ultrasonic cleaner, the Steel Wire Surface after cooling is carried out, first puts into steel wire in intermediate frequency furnace and add
Heat, to 760 DEG C, is incubated 5h, after being then placed in soaking 20min in oil cooling pond, using double normalizing+double tempering, for the first time
Normalizing：Temperature, at 725 DEG C, is incubated 6min to after temperature, is then air cooled to room temperature, then carries out second normalizing：Temperature is 780
DEG C, it is incubated 10min to after temperature, then with the speed water-cooled of 10 DEG C/s to room temperature；Then it is tempered for the first time：Heating-up temperature is 850
DEG C, it is incubated 10min to after temperature, after being then air cooled to room temperature, carry out second tempering；Heating-up temperature is 930 DEG C, is incubated to after temperature
18min, with the speed oil cooling of 8 DEG C/s to room temperature；Step (2)：First by steel wire heating to 880 DEG C, it is incubated 45min, then
The method being combined using oil cooling and water-cooled, is first cooled to 715 DEG C with oil cooling with the speed of 13 DEG C/s, then with water-cooled with 15 DEG C/s
Speed is cooled to room temperature, and steel wire heating to 545 DEG C is incubated 40min, is then cooled to room temperature with water-cooled with the speed of 15 DEG C/s,
Then it is heated to 860 DEG C, with oil cooling room temperature is cooled to 16 DEG C/s；Step (3)：Steel wire is put in vacuum drying oven, first
It is heated to 1100 DEG C with the speed of 22 DEG C/s, is incubated 4h, then whole process adopts nitrogen flushing air cooling, speed is 12 DEG C/s, cooling
To 680 DEG C, it is incubated 35min, is then cooled to 360 DEG C with 10 DEG C/s speed, be incubated 30min, then temperature be heated to again
850 DEG C, it is incubated 1h, is finally air cooled to room temperature, by steel wire heat to 980 DEG C, be incubated 5h, then water-cooled is with the speed of 15 DEG C/s
It is cooled to room temperature；Step (4)：It is then placed in drying oven, baking temperature is 160 DEG C, drying time is 5h, then air cooling
To room temperature, defect detecting test and inspection size.
The heat treatment method of aforesaid high-strength prestressed steel wire, the method is carried out according to the following steps：
Step (1)：Using ultrasonic cleaner, the Steel Wire Surface after cooling is carried out, first puts into steel wire in intermediate frequency furnace and add
Heat, to 780 DEG C, is incubated 8h, after being then placed in soaking 30min in oil cooling pond, using double normalizing+double tempering, for the first time
Normalizing：Temperature, at 730 DEG C, is incubated 8min to after temperature, is then air cooled to room temperature, then carries out second normalizing：Temperature is 785
DEG C, it is incubated 13min to after temperature, then with the speed water-cooled of 15 DEG C/s to room temperature；Then it is tempered for the first time：Heating-up temperature is 860
DEG C, it is incubated 12min to after temperature, after being then air cooled to room temperature, carry out second tempering；Heating-up temperature is 935 DEG C, is incubated to after temperature
22min, with the speed oil cooling of 12 DEG C/s to room temperature；Step (2)：First by steel wire heating to 890 DEG C, it is incubated 55min, then
The method being combined using oil cooling and water-cooled, is first cooled to 715 DEG C with oil cooling with the speed of 13 DEG C/s, then with water-cooled with 15 DEG C/s
Speed is cooled to room temperature, and steel wire heating to 545 DEG C is incubated 40min, is then cooled to room temperature with water-cooled with the speed of 15 DEG C/s,
Then it is heated to 860 DEG C, with oil cooling room temperature is cooled to 16 DEG C/s；Step (3)：Steel wire is put in vacuum drying oven, first
It is heated to 1150 DEG C with the speed of 24 DEG C/s, is incubated 8h, then whole process adopts nitrogen flushing air cooling, speed is 15 DEG C/s, cooling
To 690 DEG C, it is incubated 45min, is then cooled to 370 DEG C with 15 DEG C/s speed, be incubated 35min, then temperature be heated to again
860 DEG C, it is incubated 2h, is finally air cooled to room temperature, by steel wire heat to 985 DEG C, be incubated 8h, then water-cooled is with the speed of 18 DEG C/s
It is cooled to room temperature；Step (4)：It is then placed in drying oven, baking temperature is 180 DEG C, drying time is 8h, then air cooling
To room temperature, defect detecting test and inspection size.
The heat treatment method of aforesaid high-strength prestressed steel wire, the method is carried out according to the following steps：
Step (1)：Using ultrasonic cleaner, the Steel Wire Surface after cooling is carried out, first puts into steel wire in intermediate frequency furnace and add
Heat, to 770 DEG C, is incubated 7h, after being then placed in soaking 25min in oil cooling pond, using double normalizing+double tempering, for the first time
Normalizing：Temperature, at 728 DEG C, is incubated 5min to after temperature, is then air cooled to room temperature, then carries out second normalizing：Temperature is 782
DEG C, it is incubated 12min to after temperature, then with the speed water-cooled of 13 DEG C/s to room temperature；Then it is tempered for the first time：Heating-up temperature is 855
DEG C, it is incubated 11min to after temperature, after being then air cooled to room temperature, carry out second tempering；Heating-up temperature is 934 DEG C, is incubated to after temperature
20min, with the speed oil cooling of 11 DEG C/s to room temperature；Step (2)：First by steel wire heating to 886 DEG C, it is incubated 50min, then
The method being combined using oil cooling and water-cooled, is first cooled to 713 DEG C with oil cooling with the speed of 12 DEG C/s, then with water-cooled with 14 DEG C/s
Speed is cooled to room temperature, and steel wire heating to 540 DEG C is incubated 35min, is then cooled to room temperature with water-cooled with the speed of 13 DEG C/s,
Then it is heated to 855 DEG C, with oil cooling room temperature is cooled to 15 DEG C/s；Step (3)：Steel wire is put in vacuum drying oven, first
It is heated to 1125 DEG C with the speed of 23 DEG C/s, is incubated 7h, then whole process adopts nitrogen flushing air cooling, speed is 13 DEG C/s, cooling
To 685 DEG C, it is incubated 42min, is then cooled to 365 DEG C with 13 DEG C/s speed, be incubated 32min, then temperature be heated to again
858 DEG C, it is incubated 1.7h, is finally air cooled to room temperature, by steel wire heat to 982 DEG C, be incubated 6h, then water-cooled is with the speed of 16 DEG C/s
Degree is cooled to room temperature；Step (4)：It is then placed in drying oven, baking temperature is 165 DEG C, drying time is 6h, Ran Houkong
It is cooled to room temperature, defect detecting test and inspection size.
The invention has the beneficial effects as follows：Not only intensity is high for this high-strength prestressed steel wire, long service life, low production cost, heat
Handling process is simple, improves its corrosion-resistant, rub resistance and service life, the quantity that can reduce steel wire in redesigning just can reach
Its design requirement, cost-effective, and reduce the complexity of structure, and facilitate workman to construct, high working efficiency, safe,
Steady quality；Wherein add Mo element, corrosion resistance and intensity can be improved, add V element, energy crystal grain thinning in heat treatment,
Can increase its intensity, toughness, anticorrosive, the wear-resisting and load that withstands shocks etc., add P element, can crystal grain thinning and reduction
Its superheated susceptivity and temper brittleness, improve intensity, can improve resistant to hydrogen, nitrogen, ammonia corrosion under weather-resistant and high temperature, add
Cr and Ni trace element, can improve its wear-resisting ability ability and increase its intensity, improve its fusing point, increase the ability of high temperature resistance,
It is also added into rare earth element simultaneously, heat treatment process forms the crystal grain of densification, and is evenly distributed, increase its intensity, change
It is apt to its combination property, produce unexpected technique effect；
The grain size of steel wire can be refined in this Technology for Heating Processing using double normalizing+double tempering, improve its intensity and corrosion-resistant, resistance to
Friction and antioxygenic property, and the method being combined using oil cooling and water-cooled, is improved its intensity, and puts in vacuum drying oven and adopt
Use nitrogen flushing air cooling, can prevent from, with the oxygen of in the air, oxidation reaction occurs, be conducive to crystal grain thinning and promote crystal grain distribution uniform
Deng improving its intensity and comprehensive mechanical performance, increase its service life.
Specific embodiment
The present invention is described in further detail below：
Embodiment 1
The present embodiment provides high-strength prestressed steel wire, and chemical analysis are by mass percentage：C：0.56%, Ni：3.6%, Cr：
7.4%, Si：2.55%, Mn：1.26%, Cu：1.85%, V：4.23%, Mo：4.12%, P：0.02%, W：0.12%,
Compound rare-earth：2.32%, balance of Fe；Compound rare-earth is by mass percentage：Gd：21.5%, Pr：6.25%, Er：11.2%,
Ho：10.8%, Nd：8.2%, Sm：12.7%, Tb：22.3%, balance of La；This invention also provides this high-strength prestress
The heat treatment method of steel wire, the method is carried out according to the following steps：Step (1)：Using ultrasonic cleaner to the steel wire after cooling
Surface is carried out, and first puts into steel wire and is heated to 760 DEG C in intermediate frequency furnace, is incubated 5h, is then placed in oil cooling pond soaking 20min
Afterwards, using double normalizing+double tempering, first time normalizing：Temperature, at 725 DEG C, is incubated 6min to after temperature, is then air cooled to room
Temperature, then carry out second normalizing：Temperature, at 780 DEG C, is incubated 10min, then with the speed water-cooled of 10 DEG C/s to room to after temperature
Temperature；Then it is tempered for the first time：Heating-up temperature is 850 DEG C, is incubated 10min to after temperature, carries out second after being then air cooled to room temperature
Tempering；Heating-up temperature is 930 DEG C, is incubated 18min, with the speed oil cooling of 8 DEG C/s to room temperature to after temperature；Step (2)：First will
Steel wire heating, to 880 DEG C, is incubated 45min, then adopts the method that oil cooling and water-cooled combine, and first uses oil cooling with the speed of 13 DEG C/s
Degree is cooled to 715 DEG C, then is cooled to room temperature with water-cooled with 15 DEG C/s speed, and steel wire heating to 545 DEG C is incubated 40min, so
With water-cooled, room temperature is cooled to the speed of 15 DEG C/s afterwards, is then heated to 860 DEG C, with oil cooling room is cooled to 16 DEG C/s
Temperature；Step (3)：Steel wire is put in vacuum drying oven, is first heated to 1100 DEG C with the speed of 22 DEG C/s, be incubated 4h, Ran Houquan
Cheng Caiyong nitrogen flushing air cooling, speed is 12 DEG C/s, is cooled to 680 DEG C, is incubated 35min, is then cooled to 10 DEG C/s speed
360 DEG C, it is incubated 30min, then again temperature is heated to 850 DEG C, be incubated 1h, be finally air cooled to room temperature, by steel wire heat to 980
DEG C, it is incubated 5h, then water-cooled is cooled to room temperature with the speed of 15 DEG C/s；Step (4)：It is then placed in drying oven, be dried
Temperature is 160 DEG C, and drying time is 5h, is then air cooled to room temperature, defect detecting test and inspection size.
Embodiment 2
The present embodiment provides high-strength prestressed steel wire, and chemical analysis are by mass percentage：C：0.58%, Ni：3.8%, Cr：
7.8%, Si：2.58%, Mn：1.28%, Cu：1.92%, V：4.25%, Mo：4.15%, P：0.05%, W：0.15%,
Compound rare-earth：2.35%, balance of Fe；Compound rare-earth is by mass percentage：Gd：21.8%, Pr：6.28%, Er：11.5%,
Ho：11.2%, Nd：8.5%, Sm：12.9%, Tb：22.5%, balance of La；This invention also provides this high-strength prestress
The heat treatment method of steel wire, the method is carried out according to the following steps：Step (1)：Using ultrasonic cleaner to the steel wire after cooling
Surface is carried out, and first puts into steel wire and is heated to 780 DEG C in intermediate frequency furnace, is incubated 8h, is then placed in oil cooling pond soaking 30min
Afterwards, using double normalizing+double tempering, first time normalizing：Temperature, at 730 DEG C, is incubated 8min to after temperature, is then air cooled to room
Temperature, then carry out second normalizing：Temperature, at 785 DEG C, is incubated 13min, then with the speed water-cooled of 15 DEG C/s to room to after temperature
Temperature；Then it is tempered for the first time：Heating-up temperature is 860 DEG C, is incubated 12min to after temperature, carries out second after being then air cooled to room temperature
Tempering；Heating-up temperature is 935 DEG C, is incubated 22min, with the speed oil cooling of 12 DEG C/s to room temperature to after temperature；Step (2)：First
By steel wire heating to 890 DEG C, it is incubated 55min, then adopts the method that oil cooling and water-cooled combine, first use oil cooling with 13 DEG C/s's
Speed is cooled to 715 DEG C, then is cooled to room temperature with water-cooled with 15 DEG C/s speed, and steel wire heating to 545 DEG C is incubated 40min,
Then with water-cooled, room temperature is cooled to the speed of 15 DEG C/s, is then heated to 860 DEG C, with oil cooling being cooled to 16 DEG C/s
Room temperature；Step (3)：Steel wire is put in vacuum drying oven, is first heated to 1150 DEG C with the speed of 24 DEG C/s, be incubated 8h, then
It is whole that using nitrogen flushing air cooling, speed is 15 DEG C/s, is cooled to 690 DEG C, is incubated 45min, then with the cooling of 15 DEG C/s speed
To 370 DEG C, it is incubated 35min, then again temperature is heated to 860 DEG C, be incubated 2h, be finally air cooled to room temperature, steel wire heat is arrived
985 DEG C, it is incubated 8h, then water-cooled is cooled to room temperature with the speed of 18 DEG C/s；Step (4)：It is then placed in drying oven, do
Dry temperature is 180 DEG C, and drying time is 8h, is then air cooled to room temperature, defect detecting test and inspection size.
Embodiment 3
The present embodiment provides high-strength prestressed steel wire, and chemical analysis are by mass percentage：C：0.57%, Ni：3.7%, Cr：
7.5%, Si：2.57%, Mn：1.27%, Cu：1.88%, V：4.24%, Mo：4.13%, P：0.04%, W：0.13%,
Compound rare-earth：2.34%, balance of Fe；Compound rare-earth is by mass percentage：Gd：21.6%, Pr：6.26%, Er：11.4%,
Ho：10.9%, Nd：8.4%, Sm：12.8%, Tb：22.4%, balance of La；This invention also provides this high-strength prestress
The heat treatment method of steel wire, the method is carried out according to the following steps：Step (1)：Using ultrasonic cleaner to the steel wire after cooling
Surface is carried out, and first puts into steel wire and is heated to 770 DEG C in intermediate frequency furnace, is incubated 7h, is then placed in oil cooling pond soaking 25min
Afterwards, using double normalizing+double tempering, first time normalizing：Temperature, at 728 DEG C, is incubated 5min to after temperature, is then air cooled to room
Temperature, then carry out second normalizing：Temperature, at 782 DEG C, is incubated 12min, then with the speed water-cooled of 13 DEG C/s to room to after temperature
Temperature；Then it is tempered for the first time：Heating-up temperature is 855 DEG C, is incubated 11min to after temperature, carries out second after being then air cooled to room temperature
Tempering；Heating-up temperature is 934 DEG C, is incubated 20min, with the speed oil cooling of 11 DEG C/s to room temperature to after temperature；Step (2)：First
By steel wire heating to 886 DEG C, it is incubated 50min, then adopts the method that oil cooling and water-cooled combine, first use oil cooling with 12 DEG C/s's
Speed is cooled to 713 DEG C, then is cooled to room temperature with water-cooled with 14 DEG C/s speed, and steel wire heating to 540 DEG C is incubated 35min,
Then with water-cooled, room temperature is cooled to the speed of 13 DEG C/s, is then heated to 855 DEG C, with oil cooling being cooled to 15 DEG C/s
Room temperature；Step (3)：Steel wire is put in vacuum drying oven, is first heated to 1125 DEG C with the speed of 23 DEG C/s, be incubated 7h, then
It is whole that using nitrogen flushing air cooling, speed is 13 DEG C/s, is cooled to 685 DEG C, is incubated 42min, then with the cooling of 13 DEG C/s speed
To 365 DEG C, it is incubated 32min, then again temperature is heated to 858 DEG C, be incubated 1.7h, be finally air cooled to room temperature, by steel wire heat
To 982 DEG C, it is incubated 6h, then water-cooled is cooled to room temperature with the speed of 16 DEG C/s；Step (4)：It is then placed in drying oven,
Baking temperature is 165 DEG C, and drying time is 6h, is then air cooled to room temperature, defect detecting test and inspection size.
So by the technical scheme of above example, not only intensity is high for this high-strength prestressed steel wire, and long service life produces
Low cost, Technology for Heating Processing is simple, improves its corrosion-resistant, rub resistance and service life, can reduce the number of steel wire in redesigning
Amount just can reach its design requirement, cost-effective, and reduces the complexity of structure, facilitates workman to construct, high working efficiency,
Safe, steady quality.
Above example technological thought only to illustrate the invention it is impossible to protection scope of the present invention is limited with this, every according to this
The technological thought that invention proposes, any change done on the basis of technical scheme, each fall within the scope of the present invention.
Claims (7)
1. a kind of high-strength prestressed steel wire it is characterised in that：Chemical analysis are by mass percentage：C：0.56-0.58%, Ni：
3.6-3.8%, Cr：7.4-7.8%, Si：2.55-2.58%, Mn：1.26-1.28%, Cu：1.85-1.92%, V：4.23-4.25%,
Mo：4.12-4.15%, P：0.02-0.05%, W：0.12-0.15%, compound rare-earth：2.32-2.35%, balance of Fe；
Described compound rare-earth is by mass percentage：Gd：21.5-21.8%, Pr：6.25-6.28%, Er：11.2-11.5%,
Ho：10.8-11.2%, Nd：8.2-8.5%, Sm：12.7-12.9%, Tb：22.3-22.5%, balance of La；
The heat treatment method of wherein high-strength prestressed steel wire, the method is carried out according to the following steps：
Step (1)：Using ultrasonic cleaner, the Steel Wire Surface after cooling is carried out, first puts into steel wire in intermediate frequency furnace and add
Heat, to 760-780 DEG C, is incubated 5-8h, after being then placed in soaking 20-30min in oil cooling pond, using double normalizing+return twice
Fire, first time normalizing：Temperature, at 725-730 DEG C, is incubated 6-8min to after temperature, is then air cooled to room temperature, then carries out second
Normalizing：Temperature, at 780-785 DEG C, is incubated 10-13min, then with the speed water-cooled of 10-15 DEG C/s to room temperature to after temperature；So
It is tempered for the first time afterwards：Heating-up temperature is 850-860 DEG C, is incubated 10-12min, carries out second after being then air cooled to room temperature to after temperature
Secondary tempering；Heating-up temperature is 930-935 DEG C, is incubated 18-22min, with the speed oil cooling of 8-12 DEG C/s to room temperature to after temperature；
Step (2)：First by steel wire heating to 880-890 DEG C, it is incubated 45-55min, then adopt the side that oil cooling and water-cooled combine
Method, is first cooled to 710-715 DEG C with oil cooling with the speed of 11-13 DEG C/s, then is cooled to room with water-cooled with 10-15 DEG C/s speed
Temperature, steel wire heating to 538-545 DEG C is incubated 30-40min, is then cooled to room temperature with water-cooled with the speed of 12-15 DEG C/s,
Then it is heated to 850-860 DEG C, with oil cooling room temperature is cooled to 13-16 DEG C/s；
Step (3)：Steel wire is put in vacuum drying oven, is first heated to 1100-1150 DEG C with the speed of 22-24 DEG C/s, be incubated 4-8h,
Then whole adopt nitrogen flushing air cooling, speed is 12-15 DEG C/s, is cooled to 680-690 DEG C, is incubated 35-45min, then with
10-15 DEG C/s speed is cooled to 360-370 DEG C, is incubated 30-35min, then again temperature is heated to 850-860 DEG C, insulation
1-2h, is finally air cooled to room temperature, steel wire heat is arrived 980-985 DEG C, is incubated 5-8h, then water-cooled is cold with the speed of 15-18 DEG C/s
But to room temperature；
Step (4)：It is then placed in drying oven, baking temperature is 160-180 DEG C, drying time is 5-8h, is then air cooled to
Room temperature, defect detecting test and inspection size.
2. high-strength prestressed steel wire according to claim 1 it is characterised in that：Chemical analysis are by mass percentage：C：
0.56%, Ni：3.6%, Cr：7.4%, Si：2.55%, Mn：1.26%, Cu：1.85%, V：4.23%, Mo：4.12%,
P：0.02%, W：0.12%, compound rare-earth：2.32%, balance of Fe；
Described compound rare-earth is by mass percentage：Gd：21.5%, Pr：6.25%, Er：11.2%, Ho：10.8%, Nd：
8.2%, Sm：12.7%, Tb：22.3%, balance of La.
3. high-strength prestressed steel wire according to claim 1 it is characterised in that：Chemical analysis are by mass percentage：C：
0.58%, Ni：3.8%, Cr：7.8%, Si：2.58%, Mn：1.28%, Cu：1.92%, V：4.25%, Mo：4.15%,
P：0.05%, W：0.15%, compound rare-earth：2.35%, balance of Fe；
Described compound rare-earth is by mass percentage：Gd：21.8%, Pr：6.28%, Er：11.5%, Ho：11.2%, Nd：
8.5%, Sm：12.9%, Tb：22.5%, balance of La.
4. high-strength prestressed steel wire according to claim 1 it is characterised in that：Chemical analysis are by mass percentage：C：
0.57%, Ni：3.7%, Cr：7.5%, Si：2.57%, Mn：1.27%, Cu：1.88%, V：4.24%, Mo：4.13%,
P：0.04%, W：0.13%, compound rare-earth：2.34%, balance of Fe；
Described compound rare-earth is by mass percentage：Gd：21.6%, Pr：6.26%, Er：11.4%, Ho：10.9%, Nd：
8.4%, Sm：12.8%, Tb：22.4%, balance of La.
5. high-strength prestressed steel wire according to claim 1 it is characterised in that：The method is carried out according to the following steps：
Step (1)：Using ultrasonic cleaner, the Steel Wire Surface after cooling is carried out, first puts into steel wire in intermediate frequency furnace and add
Heat, to 760 DEG C, is incubated 5h, after being then placed in soaking 20min in oil cooling pond, using double normalizing+double tempering, for the first time
Normalizing：Temperature, at 725 DEG C, is incubated 6min to after temperature, is then air cooled to room temperature, then carries out second normalizing：Temperature is 780
DEG C, it is incubated 10min to after temperature, then with the speed water-cooled of 10 DEG C/s to room temperature；Then it is tempered for the first time：Heating-up temperature is 850
DEG C, it is incubated 10min to after temperature, after being then air cooled to room temperature, carry out second tempering；Heating-up temperature is 930 DEG C, is incubated to after temperature
18min, with the speed oil cooling of 8 DEG C/s to room temperature；
Step (2)：First by steel wire heating to 880 DEG C, it is incubated 45min, then adopt the method that oil cooling and water-cooled combine, first use
Oil cooling is cooled to 715 DEG C with the speed of 13 DEG C/s, then is cooled to room temperature with water-cooled with 15 DEG C/s speed, by steel wire heating to 545
DEG C, be incubated 40min, then with water-cooled, room temperature is cooled to the speed of 15 DEG C/s, is then heated to 860 DEG C, with oil cooling with
16 DEG C/s is cooled to room temperature；
Step (3)：Steel wire is put in vacuum drying oven, is first heated to 1100 DEG C with the speed of 22 DEG C/s, be incubated 4h, Ran Houquan
Cheng Caiyong nitrogen flushing air cooling, speed is 12 DEG C/s, is cooled to 680 DEG C, is incubated 35min, is then cooled to 10 DEG C/s speed
360 DEG C, it is incubated 30min, then again temperature is heated to 850 DEG C, be incubated 1h, be finally air cooled to room temperature, by steel wire heat to 980
DEG C, it is incubated 5h, then water-cooled is cooled to room temperature with the speed of 15 DEG C/s；
Step (4)：It is then placed in drying oven, baking temperature is 160 DEG C, drying time is 5h, is then air cooled to room temperature,
Defect detecting test and inspection size.
6. high-strength prestressed steel wire according to claim 1 it is characterised in that：The method is carried out according to the following steps：
Step (1)：Using ultrasonic cleaner, the Steel Wire Surface after cooling is carried out, first puts into steel wire in intermediate frequency furnace and add
Heat, to 780 DEG C, is incubated 8h, after being then placed in soaking 30min in oil cooling pond, using double normalizing+double tempering, for the first time
Normalizing：Temperature, at 730 DEG C, is incubated 8min to after temperature, is then air cooled to room temperature, then carries out second normalizing：Temperature is 785
DEG C, it is incubated 13min to after temperature, then with the speed water-cooled of 15 DEG C/s to room temperature；Then it is tempered for the first time：Heating-up temperature is 860
DEG C, it is incubated 12min to after temperature, after being then air cooled to room temperature, carry out second tempering；Heating-up temperature is 935 DEG C, is incubated to after temperature
22min, with the speed oil cooling of 12 DEG C/s to room temperature；
Step (2)：First by steel wire heating to 890 DEG C, it is incubated 55min, then adopt the method that oil cooling and water-cooled combine, first use
Oil cooling is cooled to 715 DEG C with the speed of 13 DEG C/s, then is cooled to room temperature with water-cooled with 15 DEG C/s speed, by steel wire heating to 545
DEG C, be incubated 40min, then with water-cooled, room temperature is cooled to the speed of 15 DEG C/s, is then heated to 860 DEG C, with oil cooling with
16 DEG C/s is cooled to room temperature；
Step (3)：Steel wire is put in vacuum drying oven, is first heated to 1150 DEG C with the speed of 24 DEG C/s, be incubated 8h, Ran Houquan
Cheng Caiyong nitrogen flushing air cooling, speed is 15 DEG C/s, is cooled to 690 DEG C, is incubated 45min, is then cooled to 15 DEG C/s speed
370 DEG C, it is incubated 35min, then again temperature is heated to 860 DEG C, be incubated 2h, be finally air cooled to room temperature, by steel wire heat to 985
DEG C, it is incubated 8h, then water-cooled is cooled to room temperature with the speed of 18 DEG C/s；
Step (4)：It is then placed in drying oven, baking temperature is 180 DEG C, drying time is 8h, is then air cooled to room temperature,
Defect detecting test and inspection size.
7. high-strength prestressed steel wire according to claim 1 it is characterised in that：The method is carried out according to the following steps：
Step (1)：Using ultrasonic cleaner, the Steel Wire Surface after cooling is carried out, first puts into steel wire in intermediate frequency furnace and add
Heat, to 770 DEG C, is incubated 7h, after being then placed in soaking 25min in oil cooling pond, using double normalizing+double tempering, for the first time
Normalizing：Temperature, at 728 DEG C, is incubated 5min to after temperature, is then air cooled to room temperature, then carries out second normalizing：Temperature is 782
DEG C, it is incubated 12min to after temperature, then with the speed water-cooled of 13 DEG C/s to room temperature；Then it is tempered for the first time：Heating-up temperature is 855
DEG C, it is incubated 11min to after temperature, after being then air cooled to room temperature, carry out second tempering；Heating-up temperature is 934 DEG C, is incubated to after temperature
20min, with the speed oil cooling of 11 DEG C/s to room temperature；
Step (2)：First by steel wire heating to 886 DEG C, it is incubated 50min, then adopt the method that oil cooling and water-cooled combine, first use
Oil cooling is cooled to 713 DEG C with the speed of 12 DEG C/s, then is cooled to room temperature with water-cooled with 14 DEG C/s speed, by steel wire heating to 540
DEG C, be incubated 35min, then with water-cooled, room temperature is cooled to the speed of 13 DEG C/s, is then heated to 855 DEG C, with oil cooling with
15 DEG C/s is cooled to room temperature；
Step (3)：Steel wire is put in vacuum drying oven, is first heated to 1125 DEG C with the speed of 23 DEG C/s, be incubated 7h, Ran Houquan
Cheng Caiyong nitrogen flushing air cooling, speed is 13 DEG C/s, is cooled to 685 DEG C, is incubated 42min, is then cooled to 13 DEG C/s speed
365 DEG C, it is incubated 32min, then again temperature is heated to 858 DEG C, be incubated 1.7h, be finally air cooled to room temperature, steel wire heat is arrived
982 DEG C, it is incubated 6h, then water-cooled is cooled to room temperature with the speed of 16 DEG C/s；
Step (4)：It is then placed in drying oven, baking temperature is 165 DEG C, drying time is 6h, is then air cooled to room temperature, visit
Triage is looked into and is checked size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410622162.9A CN104328352B (en) | 2014-11-07 | 2014-11-07 | A kind of high-strength prestressed steel wire and its heat treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410622162.9A CN104328352B (en) | 2014-11-07 | 2014-11-07 | A kind of high-strength prestressed steel wire and its heat treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104328352A CN104328352A (en) | 2015-02-04 |
| CN104328352B true CN104328352B (en) | 2017-03-01 |
Family
ID=52403157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410622162.9A Expired - Fee Related CN104328352B (en) | 2014-11-07 | 2014-11-07 | A kind of high-strength prestressed steel wire and its heat treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104328352B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789900A (en) * | 2015-03-20 | 2015-07-22 | 苏州科胜仓储物流设备有限公司 | High-strength impact-resistant metal wire for shelf back mesh and treatment process thereof |
| CN106893948A (en) * | 2017-01-19 | 2017-06-27 | 辽宁通达建材实业有限公司 | A kind of corrosion-resistant prestress pipe steel wire |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57198250A (en) * | 1981-05-28 | 1982-12-04 | Daido Steel Co Ltd | High speed tool steel |
| JPS58113352A (en) * | 1981-12-28 | 1983-07-06 | Daido Steel Co Ltd | Alloy steel for hot working |
| CN102644036A (en) * | 2012-04-28 | 2012-08-22 | 江苏天舜金属材料集团有限公司 | High-strength reinforcing steel bar with spiral fins and processing method of high-strength reinforcing steel bar |
| CN103498104A (en) * | 2013-09-26 | 2014-01-08 | 江苏天舜金属材料集团有限公司 | 630 MPa-grade high-strength hot-rolled reinforced bar and production process thereof |
| CN103643125A (en) * | 2013-11-21 | 2014-03-19 | 江苏天舜金属材料集团有限公司 | Steel bar for prestress concrete, and production process thereof |
-
2014
- 2014-11-07 CN CN201410622162.9A patent/CN104328352B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57198250A (en) * | 1981-05-28 | 1982-12-04 | Daido Steel Co Ltd | High speed tool steel |
| JPS58113352A (en) * | 1981-12-28 | 1983-07-06 | Daido Steel Co Ltd | Alloy steel for hot working |
| CN102644036A (en) * | 2012-04-28 | 2012-08-22 | 江苏天舜金属材料集团有限公司 | High-strength reinforcing steel bar with spiral fins and processing method of high-strength reinforcing steel bar |
| CN103498104A (en) * | 2013-09-26 | 2014-01-08 | 江苏天舜金属材料集团有限公司 | 630 MPa-grade high-strength hot-rolled reinforced bar and production process thereof |
| CN103643125A (en) * | 2013-11-21 | 2014-03-19 | 江苏天舜金属材料集团有限公司 | Steel bar for prestress concrete, and production process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104328352A (en) | 2015-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104313499B (en) | A kind of high intensity bridge steel plate muscle and Technology for Heating Processing thereof | |
| CN101476088B (en) | R17Cr1Ni3Mo steel for nuclear pressure vessel and preparation thereof | |
| CN101781702B (en) | Process for heat treatment of tube body of drill rod | |
| CN104532097B (en) | High-strength high corrosion-resistant nickel-base high temperature alloy and solid-solution and aging heat treatment method thereof | |
| CN104313484B (en) | Steel and Technology for Heating Processing thereof for high-strength anti-seismic corrosion-resistant steel bar | |
| CN108116006A (en) | A kind of super austenitic stainless steel Rolling compund steel plate and its manufacturing method | |
| CN103774042B (en) | A kind of CSP high magnetic induction grain-oriented silicon steel and preparation method thereof | |
| CN104328352B (en) | A kind of high-strength prestressed steel wire and its heat treatment method | |
| CN102851610A (en) | Improved structural material martensite heat-resistant steel and manufacture method thereof | |
| CN105112765A (en) | High impact high chromium cast iron plate hammer and preparation method thereof | |
| CN110358973A (en) | A kind of low cost S 420NL low-temperature flexibility steel plate and manufacturing method | |
| CN109778067A (en) | A kind of preparation method of sleeper spring | |
| CN109852778B (en) | Heat treatment process for grain refinement of 10Cr9MoW2VNbBN | |
| CN103740912A (en) | Processing method for improving temper embrittlement resistance of steel plate for pressure vessels | |
| CN101429629A (en) | Biphase stainless steel | |
| CN107675098A (en) | A kind of preparation method of lightweight high manganese steel material | |
| CN105950961A (en) | High-strength metal coating used for smoke waste heat pipeline and heat treatment process | |
| CN110055470B (en) | Container corner fitting and heat treatment process thereof | |
| CN104313500B (en) | A kind of high-strength corrosion-resistant steel bar steel containing rare earth element and Technology for Heating Processing thereof | |
| CN106939392A (en) | A kind of material for being used to cast automobile gas exhausting manifold branch | |
| CN105648347B (en) | A kind of high-wear-resistant alloy steel liner plate production technology | |
| CN102174666A (en) | Preparation method of high-temperature-resisting, abrasion-resisting, corrosion-resisting and antimagnetic material | |
| CN107794355B (en) | A kind of production method of the special thick High-strength ocean platform steel of 250mm | |
| CN110066960A (en) | A kind of high-intensitive enamel steel and its manufacturing method with excellent scaling resistance | |
| CN106755902A (en) | The Technology for Heating Processing of drill pipe body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Shiqi Inventor after: Shang Gang Inventor after: Liang Weifeng Inventor after: Li Chao Inventor after: Wang Chang Inventor after: Zhang Peng Inventor after: Zhou Tietou Inventor after: Xu Xinhui Inventor after: Yang Yongtao Inventor after: Ye Yuepeng Inventor after: Yang Jincai Inventor after: Zhao Xinfang Inventor after: Zhang Hongwei Inventor after: Wang Zhanguang Inventor before: Yao Shengfa Inventor before: Wu Haiyang |
|
| COR | Change of bibliographic data | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170126 Address after: 410003 Hunan province Changsha Kaifu District, Douling Road No. 41 Building 1 Room 201 1 Applicant after: Liu Shiqi Applicant after: Shang Gang Applicant after: Liang Weifeng Applicant after: Li Chao Applicant after: Wang Chang Applicant after: Zhang Peng Applicant after: Zhou Tietou Applicant after: Xu Xinhui Applicant after: Yang Yongtao Applicant after: Ye Yuepeng Applicant after: Yang Jincai Applicant after: Zhao Xinfang Applicant after: Zhang Hongwei Applicant after: Wang Zhanguang Address before: 212219 Jiangsu city of Zhenjiang province Yangzhong City eight Town Bridge Industrial Zone Applicant before: Jiangsu Tianshun Metal Material Group Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170301 Termination date: 20171107 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |