CN104561786A - Hot rolled wire rod for 600 MPa-grade high-strength welding and production method for hot rolled wire rod - Google Patents
Hot rolled wire rod for 600 MPa-grade high-strength welding and production method for hot rolled wire rod Download PDFInfo
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- CN104561786A CN104561786A CN201510001153.2A CN201510001153A CN104561786A CN 104561786 A CN104561786 A CN 104561786A CN 201510001153 A CN201510001153 A CN 201510001153A CN 104561786 A CN104561786 A CN 104561786A
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Abstract
The invention discloses a hot rolled wire rod for 600 MPa-grade high-strength welding and a production method for the hot rolled wire rod. The production method comprises the processes of heating, rough rolling, finish rolling, spinning, cooling and reel collecting. The steel blank which comprises the following components in percentage by mass is adopted: 0.05 to 0.09 percent of C, 0.40 to 0.80 percent of Si, 1.40 to 1.70 percent of Mn, less than or equal to 0.025 percent of P, less than or equal to 0.025 percent of S, 0.03 to 0.06 percent of V, 0.05 to 0.10 percent of Ti, and the balance of Fe and unavoidable impurities. According to the production method, a carbonitride can be formed by combining alloy elements, namely V and Ti, with C and N by utilizing the effects of microalloy elements, namely vanadium and titanium, in the steel under the condition of the existing production equipment in a vanadium and titanium alloying mode, and can achieve the effects of precipitation strengthening and refined crystalline strengthening; the precipitation of the carbonitride, the recrystallization of the austenite and the deformation state of the austenite are controlled by controlling the finish rolling temperature, the spinning temperature, the cooling speed and the reel collecting temperature; finally, the hot rolled wire rod with required strength index and uniform performance for the 600 MPa-grade high-strength welding is obtained. The hot rolled wire rod has the characteristics of low raw material cost, low production cost and stable product performance.
Description
Technical field
The present invention relates to a kind of gren rod, especially a kind of 600MPa level high-strength soldering gren rod and production method thereof.
Background technology
China is the first in the world welding material big producing country, is also the country using wlding amount maximum.Along with the ferrous materials used in all kinds of production such as pressurized vessel, automobile is tending towards high strength day by day, it is also proposed higher requirement to the intensity of deposited metal in welding, non-alloyed steel wire rod even low alloy steel wire rod can not satisfy the demands completely.
In prior art, application number be 89105436.7 welding wire and application number be 95108258.2 a kind of welding wire for gas shielded welding, all adopt expensive Ni, Mo element; The number of applying for a patent be 01128326.2 microtitanium-boron high-toughness gas protective welding stick and application number be the high-toughness gas protective welding wire for low alloy high-strength steel of 01133651.X; not containing Mo element; adopt B element; although B element can improve the intensity of deposited metal; but there is the phenomenon easily generating BN and specific absorption instability, cause smelting cost to increase.The sealing alloy steel wire rod of regulation in GB/T 3429, and the 600MPa level welding wire specified in GB/T 8110, all adopt the production technique of the multiple element composite alloyings such as Mn, Ni, Mo, V, Ti, Zr, Al; Because alloy species adds many, cause the reinforced complicated and steel rolling process complexity of steel-making on the one hand, and require higher to steel rolling equipment, cause the increase of process cost, the multi-element alloyed performance inconsistency that causes is large on the other hand, affects the stability of quality product.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of cost is low, the 600MPa level high-strength soldering gren rod of stable performance; Present invention also offers a kind of production method of 600MPa level high-strength soldering gren rod.
For solving the problems of the technologies described above, the present invention adopts the billet rolling of following mass percent composition to form: C 0.05% ~ 0.09%, Si 0.40% ~ 0.80%, Mn 1.40% ~ 1.70%, P≤0.025%, S≤0.025%, V 0.03% ~ 0.06%, Ti 0.05% ~ 0.10%, and all the other are Fe and inevitable impurity.
The inventive method comprises heating, roughing, finish rolling, weaves silk, cools and collect volume operation; Adopt the steel billet of above-mentioned mass percent composition.
Finishing rolling step described in the inventive method: entrance finishing temperature is 910 ~ 950 DEG C, finish rolling end temp is 980 ~ 1030 DEG C;
Described operation of weaving silk: the rolled piece of described finishing rolling step is water-cooled to 830 ~ 870 DEG C to start to weave silk;
Described refrigerating work procedure: wire rod after weaving silk adopts slow cooling mode to cool, speed of cooling≤1 DEG C/s;
Described collection volume operation: 500 ~ 550 DEG C of collection volumes, then air cooling.
Heating process described in the inventive method: soaking zone put into by described steel billet is that the process furnace of 1100 ~ 1180 DEG C heats, and soaking time is 40 ~ 60 minutes, comes out of the stove after making steel billet reach the Heating temperature of 1080 ~ 1150 DEG C.
Roughing operation described in the inventive method: it is 1030 ~ 1100 DEG C that roughing starts temperature.
The beneficial effect adopting technique scheme to produce is: the present invention utilizes vanadium, Ti Alloying to produce high-strength soldering gren rod; Optimize and revise the content of C, Si, Mn element, consider the impact adding V, Ti alloying element simultaneously; C, Mn are present on ferrite grain boundaries with interstitial solid solution form and displacement format, can increase dislocation drag, improve the intensity of steel; Alloying element V can be combined and form carbonitride by the N in C and steel, can play the effect of precipitation strength, refined crystalline strengthening; Alloying element Ti can be combined and form carbonitride by the N in C and steel, can play the effect of precipitation strength, refined crystalline strengthening.The present invention has that production cost is low, the feature of stable performance.
The inventive method takes vanadium, Ti Alloying mode, utilize the effect of microalloy element vanadium, titanium in steel, under the smelting and Rolling Production appointed condition of existing steel, carbonitride can be combined into C, N by alloying element V, Ti, the effect of precipitation strength, refined crystalline strengthening can be played; Control the final rolling temperature of steel rolling, laying temperature, speed of cooling and collection volume temperature and control the precipitation of carbonitride, austenitic recrystallize and austenitic deformation state, the intensity index needed for final acquisition and performance uniform 600MPa level high-strength soldering gren rod.The inventive method has the advantages that raw materials cost is low, production cost is low, product performance are stable.
Embodiment
Below in conjunction with specific embodiment, the present invention is further detailed explanation.
Embodiment 1-5: this 600MPa level high-strength soldering gren rod adopts following steel billet composition and production method.
One, the steel billet that this 600MPa level high-strength soldering gren rod adopts adopts V-Ti mode to smelt and forms, and its chemical composition is in table 1.
Table 1: the steel billet composition (wt) that each embodiment adopts
Note: all the other are Fe and inevitable impurity.
Two, the production method of this 600MPa level high-strength soldering gren rod and product performance as described below.
Embodiment 1: the steel billet of embodiment corresponding in table 1 being put into soaking zone furnace temperature is that the process furnace of 1100 ~ 1180 DEG C heats, and is 50 minutes, makes steel billet reach the Heating temperature of 1145 DEG C, come out of the stove in the soaking time of soaking zone; The steel billet of heating carries out roughing rolling after high-pressure water descaling, and it is 1050 DEG C that roughing starts temperature; Rolled piece wears long and is water-cooled to 910 DEG C, starts finish rolling, and controlling finish rolling end temp is 998 DEG C; Wear long and be water-cooled to 865 DEG C and weave silk; Adopt slow cooling mode to cool after weaving silk, speed of cooling is 0.85 DEG C/s, and collection volume temperature is 550 DEG C, air cooling after collection volume, namely obtains performance uniform 600MPa level high-strength soldering gren rod; Tensile strength is 610MPa, and relative reduction in area is 75.5%.
Embodiment 2: the steel billet of embodiment corresponding in table 1 being put into soaking zone furnace temperature is that the process furnace of 1100 ~ 1180 DEG C heats, and is 55 minutes, makes steel billet reach the Heating temperature of 1120 DEG C, come out of the stove in the soaking time of soaking zone; The steel billet of heating carries out roughing rolling after high-pressure water descaling, and it is 1065 DEG C that roughing starts temperature; Rolled piece wears long and is water-cooled to 920 DEG C, starts finish rolling, and controlling finish rolling end temp is 1030 DEG C; Wear long and be water-cooled to 870 DEG C and weave silk; Adopt slow cooling mode to cool after weaving silk, speed of cooling is 0.86 DEG C/s, and collection volume temperature is 500 DEG C, air cooling after collection volume, namely obtains performance uniform 600MPa level high-strength soldering gren rod; Tensile strength is 620MPa, and relative reduction in area is 72.0%.
Embodiment 3: the steel billet of embodiment corresponding in table 1 being put into soaking zone furnace temperature is that the process furnace of 1100 ~ 1180 DEG C heats, and is 45 minutes, makes steel billet reach the Heating temperature of 1140 DEG C, come out of the stove in the soaking time of soaking zone; The steel billet of heating carries out roughing rolling after high-pressure water descaling, and it is 1030 DEG C that roughing starts temperature; Rolled piece wears long and is water-cooled to 918 DEG C, starts finish rolling, and controlling finish rolling end temp is 1000 DEG C; Wear long and be water-cooled to 854 DEG C and weave silk; Adopt slow cooling mode to cool after weaving silk, speed of cooling is 1.0 DEG C/s, and collection volume temperature is 526 DEG C, air cooling after collection volume, namely obtains performance uniform 600MPa level high-strength soldering gren rod; Tensile strength is 630MPa, and relative reduction in area is 76.0%.
Embodiment 4: the steel billet of embodiment corresponding in table 1 being put into soaking zone furnace temperature is that the process furnace of 1100 ~ 1180 DEG C heats, and is 60 minutes, makes steel billet reach the Heating temperature of 1150 DEG C, come out of the stove in the soaking time of soaking zone; The steel billet of heating carries out roughing rolling after high-pressure water descaling, and it is 1060 DEG C that roughing starts temperature; Rolled piece wears long and is water-cooled to 925 DEG C, starts finish rolling, and controlling finish rolling end temp is 980 DEG C; Wear long and be water-cooled to 830 DEG C and weave silk; Adopt slow cooling mode to cool after weaving silk, speed of cooling is 0.90 DEG C/s, and collection volume temperature is 519 DEG C, air cooling after collection volume, and namely obtain performance uniform 600MPa level high-strength soldering gren rod, tensile strength is 615MPa; Relative reduction in area is 74.0%.
Embodiment 5: the steel billet of embodiment corresponding in table 1 being put into soaking zone furnace temperature is that the process furnace of 1100 ~ 1180 DEG C heats, and is 40 minutes, makes steel billet reach the Heating temperature of 1080 DEG C, come out of the stove in the soaking time of soaking zone; The steel billet of heating carries out roughing rolling after high-pressure water descaling, and it is 1100 DEG C that roughing starts temperature; Rolled piece wears long and is water-cooled to 950 DEG C, starts finish rolling, and controlling finish rolling end temp is 1020 DEG C; Wear long and be water-cooled to 851 DEG C and weave silk; Adopt slow cooling mode to cool after weaving silk, speed of cooling is 0.88 DEG C/s, and collection volume temperature is 522 DEG C, air cooling after collection volume, and namely obtain performance uniform 600MPa level high-strength soldering gren rod, tensile strength is 625MPa; Relative reduction in area is 72.5%.
Claims (5)
1. a 600MPa level high-strength soldering gren rod, it is characterized in that, it adopts the billet rolling of following mass percent composition to form: C 0.05% ~ 0.09%, Si 0.40% ~ 0.80%, Mn 1.40% ~ 1.70%, P≤0.025%, S≤0.025%, V 0.03% ~ 0.06%, Ti 0.05% ~ 0.10%, and all the other are Fe and inevitable impurity.
2. a production method for 600MPa level high-strength soldering gren rod, is characterized in that: it comprises heating, roughing, finish rolling, weaves silk, cools and collect volume operation; Adopt the steel billet of following mass percent composition: C 0.05% ~ 0.09%, Si 0.40% ~ 0.80%, Mn 1.40% ~ 1.70%, P≤0.025%, S≤0.025%, V 0.03% ~ 0.06%, Ti 0.05% ~ 0.10%, all the other are Fe and inevitable impurity.
3. the production method of 600MPa level high-strength soldering gren rod according to claim 2, it is characterized in that, described finishing rolling step: entrance finishing temperature is 910 ~ 950 DEG C, finish rolling end temp is 980 ~ 1030 DEG C;
Described operation of weaving silk: the rolled piece of described finishing rolling step is water-cooled to 830 ~ 870 DEG C to start to weave silk;
Described refrigerating work procedure: wire rod after weaving silk adopts slow cooling mode to cool, speed of cooling≤1 DEG C/s;
Described collection volume operation: 500 ~ 550 DEG C of collection volumes, then air cooling.
4. the production method of 600MPa level high-strength soldering gren rod according to claim 2, it is characterized in that, described heating process: soaking zone put into by described steel billet is that the process furnace of 1100 ~ 1180 DEG C heats, and comes out of the stove after making steel billet reach the Heating temperature of 1080 ~ 1150 DEG C.
5. the production method of the 600MPa level high-strength soldering gren rod according to claim 2,3 or 4, is characterized in that, described roughing operation: it is 1030 ~ 1100 DEG C that roughing starts temperature.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756539A (en) * | 2016-12-05 | 2017-05-31 | 北京科技大学 | A kind of endurance high-strength steel with nanometer precipitated phase and preparation method thereof |
| CN108326050A (en) * | 2018-01-25 | 2018-07-27 | 柳州钢铁股份有限公司 | A kind of hot-rolling method reducing cold-heading low-carbon steel rod bundle mixed grain structure |
| CN109234637A (en) * | 2018-10-30 | 2019-01-18 | 河钢股份有限公司承德分公司 | A kind of Korea Spro marks SD600 valve snail steel and its production method |
| CN109706391A (en) * | 2018-12-14 | 2019-05-03 | 河钢股份有限公司承德分公司 | A kind of 60 kg class high-strength welding wire gren rod and its production method |
| CN111041346A (en) * | 2019-11-19 | 2020-04-21 | 河钢股份有限公司承德分公司 | Hot-rolled wire rod for 90 kg-grade welding wire and production method thereof |
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| CN102352469A (en) * | 2011-11-03 | 2012-02-15 | 江苏省沙钢钢铁研究院有限公司 | Ultrahigh-strength vanadium-titanium composite microalloyed high-carbon steel wire rod and preparation method thereof |
| CN102632320A (en) * | 2012-04-09 | 2012-08-15 | 南京钢铁股份有限公司 | Method for welding high-grade wear-resistant steel under protection of carbon dioxide |
| CN104213018A (en) * | 2014-08-25 | 2014-12-17 | 河北钢铁股份有限公司承德分公司 | 500E Australian standard wire and production method thereof |
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2015
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Patent Citations (3)
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| CN102352469A (en) * | 2011-11-03 | 2012-02-15 | 江苏省沙钢钢铁研究院有限公司 | Ultrahigh-strength vanadium-titanium composite microalloyed high-carbon steel wire rod and preparation method thereof |
| CN102632320A (en) * | 2012-04-09 | 2012-08-15 | 南京钢铁股份有限公司 | Method for welding high-grade wear-resistant steel under protection of carbon dioxide |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756539A (en) * | 2016-12-05 | 2017-05-31 | 北京科技大学 | A kind of endurance high-strength steel with nanometer precipitated phase and preparation method thereof |
| CN106756539B (en) * | 2016-12-05 | 2018-05-18 | 北京科技大学 | A kind of endurance high-strength steel with nanometer precipitated phase and preparation method thereof |
| CN108326050A (en) * | 2018-01-25 | 2018-07-27 | 柳州钢铁股份有限公司 | A kind of hot-rolling method reducing cold-heading low-carbon steel rod bundle mixed grain structure |
| CN108326050B (en) * | 2018-01-25 | 2019-07-19 | 柳州钢铁股份有限公司 | A kind of hot-rolling method reducing cold-heading low-carbon steel rod bundle mixed grain structure |
| CN109234637A (en) * | 2018-10-30 | 2019-01-18 | 河钢股份有限公司承德分公司 | A kind of Korea Spro marks SD600 valve snail steel and its production method |
| CN109234637B (en) * | 2018-10-30 | 2021-05-25 | 河钢股份有限公司承德分公司 | Korean SD600 disc screw steel and production method thereof |
| CN109706391A (en) * | 2018-12-14 | 2019-05-03 | 河钢股份有限公司承德分公司 | A kind of 60 kg class high-strength welding wire gren rod and its production method |
| CN111041346A (en) * | 2019-11-19 | 2020-04-21 | 河钢股份有限公司承德分公司 | Hot-rolled wire rod for 90 kg-grade welding wire and production method thereof |
| CN111041346B (en) * | 2019-11-19 | 2021-02-26 | 河钢股份有限公司承德分公司 | Hot-rolled wire rod for 90 kg-grade welding wire and production method thereof |
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Application publication date: 20150429 |