CN105132804A - Method for rolling vanadium-titanium welding steel hot-rolled wire rod - Google Patents
Method for rolling vanadium-titanium welding steel hot-rolled wire rod Download PDFInfo
- Publication number
- CN105132804A CN105132804A CN201510559693.2A CN201510559693A CN105132804A CN 105132804 A CN105132804 A CN 105132804A CN 201510559693 A CN201510559693 A CN 201510559693A CN 105132804 A CN105132804 A CN 105132804A
- Authority
- CN
- China
- Prior art keywords
- welding steel
- temperature
- vanadium titanium
- titanium class
- gren rod
- 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.)
- Pending
Links
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a method for rolling a vanadium-titanium welding steel hot-rolled wire rod and aims to control the structure and the performance, reduce the tensile strength and improve the ductility ratio and the area reduction ratio of vanadium-titanium welding steel through controlling the heating temperature, sizing reduction inlet temperature, the spinning temperature and the Stelmor cooling process so as to improve the drawing performance. The method particularly comprises the following steps: adjusting the temperature of the soaking zone of a heating furnace to be 1,000-1,100 DEG C, the sizing reduction inlet temperature to be 750-850 DEG C and the spinning temperature to be 850-950 DEG C; closing down a Stelmor air-cooling line blower and cover cap; adjusting the roller speed to be 0.09-0.15 m/s; and guaranteeing the cooling speed of a wire rod in the air cooling line to be smaller than 0.5 DEG C/s. According to the method, in the wire drawing process, annealing before drawing is omitted, so that the production efficiency during drawing is improved, and the production cost of welding steel is lowered.
Description
Technical field
The present invention relates to a kind of for wire drawing class welding steel gren rod, specifically a kind of rolling method of vanadium titanium class welding steel gren rod.
Background technology
Along with the development of China's Iron And Steel Industry and welding industry, the field such as bridge construction, shipbuilding starts more and more to adopt low-carbon alloy steel to reach heavy lift and light-weighted object, and the consumption of alloy welding steel is also increasing.Because alloy welding steel interalloy content is higher, the especially precipitation strength of V, Ti alloying element and refined crystalline strengthening effect, cause the intensity of alloy steel wire for welding high, plasticity and toughness are poor.So alloy steel wire for welding must first once be annealed before drawing, after intensity and plasticity and toughness coupling reach drawing requirement, just wire drawing can be carried out, this reduces the production efficiency of factory undoubtedly, adds the production cost of factory simultaneously, the average production cost increasing by 300 yuan/ton.Therefore, improve the microstructure and property of alloy steel wire for welding, to the production efficiency improving next procedure, reduce production cost and have great importance.
Adding of the alloying elements such as V, Ti, Ni, Mo, on the one hand itself precipitation strength and refined crystalline strengthening effect can affect intensity and the plasticity and toughness of steel wire for welding, on the other hand, the membership that adds of these elements causes the C curve of welding steel to move to right, in the process of cooling, very easily form the over-cooling structures such as granular bainite, cause intensity too high, plasticity and toughness are poor.
Summary of the invention
High for wire drawing class welding steel gren rod intensity, plasticity and toughness are poor, the shortcoming of carrying out annealing is needed before wire drawing, the object of this invention is to provide a kind of rolling method of vanadium titanium class welding steel gren rod, adopt the method can optimize intensity and the plasticity and toughness of vanadium titanium class welding steel gren rod, so that carry out exempting from direct drawing of annealing.
Object of the present invention is achieved through the following technical solutions:
A kind of rolling method of vanadium titanium class welding steel gren rod, it is characterized in that: the method is by controlling Heating temperature, subtracting the microstructure and property that sizing temperature in, laying temperature and stelmor cooling technique control vanadium titanium class welding steel, the moiety of this welding steel is C%:0.06 ~ 0.10, Mn%:1.60 ~ 1.80, Si%:0.5 ~ 0.1, V%:0.02 ~ 0.10, Ti%:0.10 ~ 0.20, all the other are Fe; Specifically comprise the following steps:
1) regulate process furnace burner aperture to make soaking zone temperature ensure at 1000 ~ 1100 DEG C, suppress V, Ti alloying element to back dissolving in austenite by low-temperature heat, thus reach the amount of precipitation of control V, Ti alloying element in process of cooling;
2) regulating the rolling line water-cooled line water yield to make to subtract sizing temperature in ensures at 750 ~ 850 DEG C, increases phase deformed nucleus particle, improves nucleation rate, promote ferrite+pearlitic transformation, reach deformation-induced ferrite transformation by low temperature finish to gauge;
3) after regulating finish to gauge, the water-cooled line water yield makes laying temperature ensure at 850 ~ 950 DEG C, the morphology and distribution of control V, Ti precipitate of being weaved silk by high temperature;
4) Stanermo wind-cooling linear blower fan is closed, and adjust roller table speed to 0.09 ~ 0.15m/s, thus wire rod cooling rate < 0.5 DEG C/s in guarantee air-cooled line, and give the transformation time of ferritic-pearlitic phase transformation abundance, promote ferrite+pearlitic transformation.
Further, welding steel moiety is C%:0.06 ~ 0.10, Mn%:1.60 ~ 1.80, Si%:0.50 ~ 1.00, V%:0.02 ~ 0.10, Ti%:0.10 ~ 0.20, Ni%:0.50 ~ 1.00, Mo%:0.30 ~ 0.50, all the other are Fe, not containing the corrosion-resistant element such as Cr, Cu.
In the present invention, the open range of process furnace soaking zone burner is 10 ~ 50%, ensures that soaking zone temperature is at 1000 ~ 1100 DEG C; Before finish to gauge, the regulation range of the water-cooled line water yield is 1000 ~ 1500L/min, ensures that finishing temperature is at 750 ~ 850 DEG C; After finish to gauge, the regulation range of the water-cooled line water yield is 500 ~ 1000L/min, ensures that laying temperature is at 850 ~ 950 DEG C; Close Stanermo wind-cooling linear blower fan, roller table speed controls at 0.09 ~ 0.15m/s, and what ensure vanadium titanium class welding steel gren rod enters cover cap temperature at 800 ~ 850 DEG C.
Its committed step controlling laying temperature and stelmor cooling technique is as follows:
1. optimize the room temperature texture of vanadium titanium class steel wire for welding
Before finish to gauge, the regulation range of the water-cooled line water yield is 1000 ~ 1500L/min, ensures that finishing temperature (subtracting sizing temperature in) is at 750 ~ 850 DEG C; Close Stanermo wind-cooling linear blower fan, roller table speed controls at 0.09 ~ 0.15m/s, and what ensure vanadium titanium class welding steel gren rod enters cover cap temperature at 800 ~ 850 DEG C.Lower finishing temperature, can cause deformation-induced ferrite transformation, and promote ferritic-pearlitic phase transformation, meanwhile, the cooling rate of wire rod in air-cooled line insulation shroud is low, and the time is long, has enough conditions and time to carry out ferritic-pearlitic phase transformation.
2. optimize the mechanical property of vanadium titanium class steel wire for welding
The open range of process furnace soaking zone burner is 10 ~ 50%, ensures that soaking zone temperature is at 1000 ~ 1100 DEG C; Before finish to gauge, the regulation range of the water-cooled line water yield is 1000 ~ 1500L/min, ensures that finishing temperature is at 750 ~ 850 DEG C; After finish to gauge, the regulation range of the water-cooled line water yield is 500 ~ 1000L/min, ensures that laying temperature is at 850 ~ 950 DEG C; Close Stanermo wind-cooling linear blower fan, roller table speed controls at 0.09 ~ 0.15m/s, and what ensure vanadium titanium class welding steel gren rod enters cover cap temperature at 800 ~ 850 DEG C.Low Heating temperature, reduces the back dissolving amount of V, Ti alloying element, thus weakens its precipitation strength and refined crystalline strengthening effect; Low finishing temperature and speed of cooling, avoid vanadium titanium class steel wire for welding to form granular bainite; High laying temperature, the pick-up behavior of control V, Ti alloying element.Reduced the tensile strength of vanadium titanium class steel wire for welding by above measure, improve its unit elongation and reduction of area simultaneously.
Vanadium titanium class steel wire for welding, due to the precipitation strength of the alloying elements such as V, Ti and refined crystalline strengthening effect, makes the intensity of wire rod too high, is unfavorable for drawing.The membership that adds of these elements simultaneously causes the C curve of vanadium titanium class welding steel to move to right, and in the process of cooling, very easily form the over-cooling structures such as granular bainite, cause intensity too high, plasticity and toughness are poor.So intensity and the plasticity and toughness of vanadium titanium class steel wire for welding will be improved, the pick-up behavior of alloying element will be controlled, the generation of granular bainite microstructure should be avoided simultaneously in process of cooling.The present invention is mainly through controlling Heating temperature, finishing mill temperature in, the sizing temperature in that subtracts, laying temperature and stelmor cooling technique to control intensity and the plasticity and toughness of vanadium titanium class welding steel gren rod.The present invention is applicable to adopt in the rear wire drawing class welding steel gren rod of annealing.
Beneficial effect of the present invention is:
Optimize the room temperature texture of vanadium titanium class welding steel gren rod; Reduce the tensile strength of vanadium titanium class welding steel gren rod; Improve unit elongation and the reduction of area of vanadium titanium class welding steel gren rod.The present invention eliminates the annealing process before drawing in drawing process, improves production efficiency during drawing, reduces the production cost of welding steel.
Accompanying drawing explanation
Fig. 1-1 is the metallograph of the vanadium titanium class welding steel gren rod adopting former method in embodiment 1;
Fig. 1-2 is the metallograph adopting vanadium titanium class welding steel gren rod of the present invention in embodiment 1;
Fig. 2-1 is the metallograph of the vanadium titanium class welding steel gren rod adopting former method in embodiment 2;
Fig. 2-2 is the metallographs adopting vanadium titanium class welding steel gren rod of the present invention in embodiment 2.
Specific embodiments
Embodiment 1
A rolling method for vanadium titanium class welding steel gren rod, is characterized in that: the method is by controlling Heating temperature, subtracting the microstructure and property that sizing temperature in, laying temperature and stelmor cooling technique control vanadium titanium class welding steel.Design parameter: the chemical composition shown in table 1 being vanadium titanium class welding steel gren rod in embodiment 1 is the process program of the rolling technique of vanadium titanium class welding steel gren rod in embodiment 1 shown in table 2.Process furnace soaking zone temperature is reduced to 1080 DEG C by 1150 DEG C, and subtract sizing temperature in and be reduced to 830 DEG C by original 860 DEG C, laying temperature has brought up to 860 DEG C by original 820 DEG C, and roller table speed is reduced to 0.15m/s by original 0.2m/s.
Be mechanical property and the metallographic structure of the vanadium titanium class welding steel gren rod of embodiment 1 as shown in chart 3, Fig. 1-1 is the metallograph of the vanadium titanium class welding steel gren rod adopting former method in embodiment 1; Fig. 1-2 is the metallograph adopting vanadium titanium class welding steel gren rod of the present invention in embodiment 1.Tensile strength under this rolling technology is reduced to 795MPa by original 890MPa, unit elongation is promoted to 32% by original 14%, reduction of area is promoted to 71% by original 56%, and intensity and plasticity and toughness reach good mating, and can carry out exempting from direct drawing of annealing.
The chemical composition of vanadium titanium class welding steel gren rod in table 1 embodiment 1
| Element | C | Mn | Si | V | Ti | Ni | Mo |
| Content | 0.06 | 1.85 | 0.6 | 0.05 | 0.18 | 0.9 | 0.45 |
The rolling technology scheme of vanadium titanium class welding steel gren rod in table 2 embodiment 1
The mechanical property of vanadium titanium class welding steel gren rod and metallographic structure in table 3 embodiment 1
Embodiment 2
As shown in table 4 is the chemical composition of vanadium titanium class welding steel gren rod in embodiment 2, is the process program of the rolling technique of vanadium titanium class welding steel gren rod in embodiment 2 shown in table 5.Process furnace soaking zone temperature is reduced to 1040 DEG C by 1170 DEG C, and subtract sizing temperature in and be reduced to 790 DEG C by original 850 DEG C, laying temperature has brought up to 900 DEG C by original 830 DEG C, and roller table speed is reduced to 0.1m/s by original 0.22m/s.
As chart 6 is depicted as mechanical property and the metallographic structure of the vanadium titanium class welding steel gren rod of embodiment 2, Fig. 2-1 is the metallograph of the vanadium titanium class welding steel gren rod adopting former method in embodiment 2; Fig. 2-2 is the metallographs adopting vanadium titanium class welding steel gren rod of the present invention in embodiment 2.Tensile strength under this rolling technology is reduced to 785MPa by original 910MPa, unit elongation is promoted to 34% by original 14%, reduction of area is promoted to 76% by original 54%, and intensity and plasticity and toughness reach good mating, and can carry out exempting from direct drawing of annealing.
The chemical composition of vanadium titanium class welding steel gren rod in table 4 embodiment 2
| Element | C | Mn | Si | V | Ti | Ni | Mo |
| Content | 0.07 | 1.9 | 0.55 | 0.045 | 0.2 | 1.0 | 0.48 |
The rolling technology scheme of vanadium titanium class welding steel gren rod in table 5 embodiment 2
The mechanical property of vanadium titanium class welding steel gren rod and metallographic structure in table 6 embodiment 2
Claims (7)
1. the rolling method of a vanadium titanium class welding steel gren rod, it is characterized in that: the method is by controlling Heating temperature, subtracting the microstructure and property that sizing temperature in, laying temperature and stelmor cooling technique control vanadium titanium class welding steel, the moiety of this welding steel is C%:0.06 ~ 0.10, Mn%:1.60 ~ 1.80, Si%:0.5 ~ 0.1, V%:0.02 ~ 0.10, Ti%:0.10 ~ 0.20, all the other are Fe; Specifically comprise the following steps:
1) regulate process furnace burner aperture to make soaking zone temperature ensure at 1000 ~ 1100 DEG C, suppress V, Ti alloying element to back dissolving in austenite by low-temperature heat, thus reach the amount of precipitation of control V, Ti alloying element in process of cooling;
2) regulating the rolling line water-cooled line water yield to make to subtract sizing temperature in ensures at 750 ~ 850 DEG C, increases phase deformed nucleus particle, improves nucleation rate, promote ferrite+pearlitic transformation, reach deformation-induced ferrite transformation by low temperature finish to gauge;
3) after regulating finish to gauge, the water-cooled line water yield makes laying temperature ensure at 850 ~ 950 DEG C, the morphology and distribution of control V, Ti precipitate of being weaved silk by high temperature;
4) Stanermo wind-cooling linear blower fan is closed, and adjust roller table speed to 0.09 ~ 0.15m/s, thus wire rod cooling rate < 0.5 DEG C/s in guarantee air-cooled line, and give the transformation time of ferritic-pearlitic phase transformation abundance, promote ferrite+pearlitic transformation.
2. the rolling method of vanadium titanium class welding steel gren rod according to claim 1, it is characterized in that: welding steel moiety is C%:0.06 ~ 0.10, Mn%:1.60 ~ 1.80, Si%:0.50 ~ 1.00, V%:0.02 ~ 0.10, Ti%:0.10 ~ 0.20, Ni%:0.50 ~ 1.00, Mo%:0.30 ~ 0.50, all the other are Fe.
3. the rolling method of vanadium titanium class welding steel gren rod according to claim 1, is characterized in that: the open range of process furnace soaking zone burner is 10 ~ 50%.
4. the rolling method of vanadium titanium class welding steel gren rod according to claim 1, is characterized in that: before finish to gauge, the regulation range of the water-cooled line water yield is 1000 ~ 1500L/min.
5. the rolling method of vanadium titanium class welding steel gren rod according to claim 1, is characterized in that: after finish to gauge, the regulation range of the water-cooled line water yield is 500 ~ 1000L/min.
6. the rolling method of vanadium titanium class welding steel gren rod according to claim 1, it is characterized in that: close Stanermo wind-cooling linear blower fan, roller table speed controls at 0.09 ~ 0.15m/s, and what ensure welding steel gren rod enters cover cap temperature at 800 ~ 850 DEG C.
7. the rolling method of vanadium titanium class welding steel gren rod according to claim 1, it is characterized in that: the tensile strength < 800MPa of vanadium titanium class welding steel gren rod, unit elongation > 30%, reduction of area > 70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510559693.2A CN105132804A (en) | 2015-09-06 | 2015-09-06 | Method for rolling vanadium-titanium welding steel hot-rolled wire rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510559693.2A CN105132804A (en) | 2015-09-06 | 2015-09-06 | Method for rolling vanadium-titanium welding steel hot-rolled wire rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105132804A true CN105132804A (en) | 2015-12-09 |
Family
ID=54718367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510559693.2A Pending CN105132804A (en) | 2015-09-06 | 2015-09-06 | Method for rolling vanadium-titanium welding steel hot-rolled wire rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105132804A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234508A (en) * | 2018-10-10 | 2019-01-18 | 邢台钢铁有限责任公司 | A kind of medium carbon steel wire rod and its production method with high intensity and high-ductility |
| CN110079736A (en) * | 2019-05-23 | 2019-08-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Uniform low carbon low silicon welding steel of structure property and preparation method thereof |
| CN111424210A (en) * | 2020-03-31 | 2020-07-17 | 江苏省沙钢钢铁研究院有限公司 | Hot-rolled wire rod for welding wire and production method thereof |
| CN112226594A (en) * | 2020-10-19 | 2021-01-15 | 江苏永钢集团有限公司 | Production method for reducing abnormal 50CrV tissue |
| CN113546962A (en) * | 2021-06-21 | 2021-10-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Production method of corrosion-resistant wire rod for winding steel wire on bridge main cable |
| CN113584385A (en) * | 2021-07-26 | 2021-11-02 | 青岛特殊钢铁有限公司 | Controlled cooling method for martensite/bainite-based high-strength annealing-free welding wire rod |
| CN114606366A (en) * | 2022-02-08 | 2022-06-10 | 首钢集团有限公司 | Production method for improving drawing performance of steel for 70 kg-grade gas shielded welding wire |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255354A (en) * | 2013-06-03 | 2013-08-21 | 江苏大学 | Steel for composite microalloying welding wire and preparation method thereof |
| CN103305675A (en) * | 2013-06-13 | 2013-09-18 | 攀钢集团成都钢钒有限公司 | Method for controlling surface decarburized layer of hot-finished rod for steel cord |
| CN103667925A (en) * | 2013-12-16 | 2014-03-26 | 天津钢铁集团有限公司 | Production technology of wire rod for solid surfacing welding wires |
| KR101417590B1 (en) * | 2013-02-06 | 2014-07-09 | 주식회사 포스코 | Method for manufacturing wire rod for weldind rod having reduced michanical property and wire rod for weldind rod produced by the same |
| CN104551441A (en) * | 2014-11-27 | 2015-04-29 | 宝山钢铁股份有限公司 | Ultrahigh-strength gas protection welding wire containing V and manufacturing method thereof |
-
2015
- 2015-09-06 CN CN201510559693.2A patent/CN105132804A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101417590B1 (en) * | 2013-02-06 | 2014-07-09 | 주식회사 포스코 | Method for manufacturing wire rod for weldind rod having reduced michanical property and wire rod for weldind rod produced by the same |
| CN103255354A (en) * | 2013-06-03 | 2013-08-21 | 江苏大学 | Steel for composite microalloying welding wire and preparation method thereof |
| CN103305675A (en) * | 2013-06-13 | 2013-09-18 | 攀钢集团成都钢钒有限公司 | Method for controlling surface decarburized layer of hot-finished rod for steel cord |
| CN103667925A (en) * | 2013-12-16 | 2014-03-26 | 天津钢铁集团有限公司 | Production technology of wire rod for solid surfacing welding wires |
| CN104551441A (en) * | 2014-11-27 | 2015-04-29 | 宝山钢铁股份有限公司 | Ultrahigh-strength gas protection welding wire containing V and manufacturing method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234508A (en) * | 2018-10-10 | 2019-01-18 | 邢台钢铁有限责任公司 | A kind of medium carbon steel wire rod and its production method with high intensity and high-ductility |
| CN109234508B (en) * | 2018-10-10 | 2020-07-24 | 邢台钢铁有限责任公司 | Medium-carbon steel wire rod with high strength and high plasticity and production method thereof |
| CN110079736A (en) * | 2019-05-23 | 2019-08-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Uniform low carbon low silicon welding steel of structure property and preparation method thereof |
| CN111424210A (en) * | 2020-03-31 | 2020-07-17 | 江苏省沙钢钢铁研究院有限公司 | Hot-rolled wire rod for welding wire and production method thereof |
| CN112226594A (en) * | 2020-10-19 | 2021-01-15 | 江苏永钢集团有限公司 | Production method for reducing abnormal 50CrV tissue |
| CN113546962A (en) * | 2021-06-21 | 2021-10-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Production method of corrosion-resistant wire rod for winding steel wire on bridge main cable |
| CN113584385A (en) * | 2021-07-26 | 2021-11-02 | 青岛特殊钢铁有限公司 | Controlled cooling method for martensite/bainite-based high-strength annealing-free welding wire rod |
| CN114606366A (en) * | 2022-02-08 | 2022-06-10 | 首钢集团有限公司 | Production method for improving drawing performance of steel for 70 kg-grade gas shielded welding wire |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105132804A (en) | Method for rolling vanadium-titanium welding steel hot-rolled wire rod | |
| CN103952633B (en) | There is high-strength steel wire and the production method thereof of favorable low-temperature impact toughness | |
| CN108220798A (en) | A kind of 460MPa grades of antidetonation fire-resistive construction steel and preparation method thereof | |
| CN107127212A (en) | The method of manganese cold-rolled steel sheet in super rapid heating technique productions high strength and ductility | |
| CN102936688B (en) | Wire with tensile strength>=2000MPa for bridge cable and production method | |
| CN102409229B (en) | N80Q grade straight seam ERW (Electric Resistance Welding) petroleum casing and manufacturing method thereof | |
| CN103484768B (en) | The high-strength engineering steel plate of a kind of length >=30m and production method | |
| CN111455281B (en) | Method for controlling yield strength fluctuation of same ring of HRB400E wire rod twisted steel and HRB400E wire rod twisted steel | |
| CN104388820A (en) | High-strength hot-rolled strip steel having favorable stretch-flangeability and production method thereof | |
| CN104988409A (en) | Non-annealed cold forging steel hot-rolled wire rod and production method thereof | |
| CN108559917A (en) | A kind of yield strength 1100MPa grades of Ultra-fine Grained high strength steel plates and its manufacturing method | |
| CN110453153A (en) | A kind of low cost Wire Rod Steel for Curtain String Purpose and its production method | |
| CN104357743A (en) | Hot-rolled strip steel with hole expansion rate of greater than 90% and production method of hot-rolled strip steel | |
| CN103966411A (en) | Manufacturing method for medium-carbon cold forging steel rods and wires | |
| CN104962817A (en) | Simple annealing cold heading steel hot rolled wire rod for high-strength fastener and production method of simple annealing cold heading steel hot rolled wire rod | |
| CN113943883A (en) | Method for improving Agt of Nb microalloying HRB400E hot-rolled wire rod reinforcing steel bar and hot-rolled wire rod reinforcing steel bar | |
| CN114517254B (en) | Low-temperature-resistant flat bulb steel for ship and preparation method thereof | |
| CN106480373A (en) | A kind of 9.8 grades of securing members non-quenched cold heading steel wire rod and its production methods | |
| CN103757536B (en) | The high-strength tie of thin strap continuous casting economy of tensile strength >=1100MPa and manufacture method thereof | |
| CN103484764B (en) | Ti precipitation strength type superhigh-strength hot rolls thin plate and production method thereof | |
| CN101899616B (en) | Steel for 600MPa-grade high-strength engineering machines and production method thereof | |
| CN106480372A (en) | A kind of 8.8 grades of securing members non-quenched cold heading steel wire rod and its production methods | |
| CN109554631A (en) | A kind of low-alloy steel and steel wire prepared therefrom processing High-strength high-plasticity wire rod | |
| CN103233169B (en) | The high strength thin specification steel plate that plate shape is excellent and production method thereof | |
| CN104694846B (en) | A kind of low temperature seamless steel pipe and its production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151209 |