CN102703809A - Hot-rolled steel and manufacturing method thereof - Google Patents
Hot-rolled steel and manufacturing method thereof Download PDFInfo
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- CN102703809A CN102703809A CN2011100750733A CN201110075073A CN102703809A CN 102703809 A CN102703809 A CN 102703809A CN 2011100750733 A CN2011100750733 A CN 2011100750733A CN 201110075073 A CN201110075073 A CN 201110075073A CN 102703809 A CN102703809 A CN 102703809A
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- 239000010959 steel Substances 0.000 title claims abstract description 71
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 claims description 42
- 238000007670 refining Methods 0.000 claims description 17
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- 238000010438 heat treatment Methods 0.000 claims description 9
- 229910052748 manganese Inorganic materials 0.000 claims description 9
- 239000011572 manganese Substances 0.000 claims description 9
- 238000007669 thermal treatment Methods 0.000 claims description 9
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- 239000010955 niobium Substances 0.000 claims description 8
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 8
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- 239000011574 phosphorus Substances 0.000 claims description 6
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- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 239000005864 Sulphur Substances 0.000 claims description 5
- 238000009933 burial Methods 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
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- 238000001816 cooling Methods 0.000 claims description 5
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract 1
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- 235000011941 Tilia x europaea Nutrition 0.000 description 3
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Abstract
The invention provides a hot-rolled steel and a manufacturing method thereof. The hot-rolled steel contains 1.70 to 1.85% (by weight) of manganese, so the hot-rolled steel has high obdurability, and can be used as the steel for anchor chains. The manufacturing method of the hot-rolled steel can obtain the hot-rolled steel having same or even better obdurability by a small size continuous casting billet compared with that by a large size continuous casting billet.
Description
Technical field
The invention belongs to field of metallurgy, relate to a kind of with HRS and method of manufacture thereof.
Background technology
Three grades of anchor chains are shipbuilding industry a kind of steel commonly used with hot rolled circular steel, often adopt big section continuously cast bloom to form so that the hot rolling mode is rolling.At present employed three grades of anchor chains require the obdurability after modified will reach following requirement with hot rolled circular steel, like ys (σ
s) be 410Mpa, tensile strength (σ
b) be 690Mpa, elongation (δ) is 17%, relative reduction in area (φ) 40%, v-notch average ballistic work in central position is 60J in the time of 0 ℃, in the time of-20 ℃, is 35J.In order to satisfy the high-strong toughness requirement of three grades of anchor chains with hot rolled circular steel, in manufacturing processed, the compression ratio minimum of continuously cast bloom should be 7: 1, and during like the round steel of production diameter of phi 150mm, the cross dimensions that requires continuously cast bloom is at least more than 350 * 350mm.That is to say; Prior art is produced three grades of anchor chains at first will obtain the continuously cast bloom of section greatly with hot rolled circular steel, yet the cross dimensions of continuously cast bloom is by the appointed condition decision of continuous caster; If continuous caster only can be produced the continuously cast bloom that section is 260 * 340mm; When then it being rolled into the round steel of diameter of phi 150mm, the compression ratio of hot rolling material is merely 5: 1, and three grades of anchor chains making thus can't reach the obdurability of design requirements with the obdurability of hot rolled circular steel.
Summary of the invention
Technical problem to be solved by this invention is to the above-mentioned defective that exists in the prior art, and a kind of HRS and method of manufacture thereof are provided, and said HRS has high-strong toughness.
The present invention also provides a kind of method of manufacture of HRS, and this method can obtain the HRS of high-strong toughness, and the production of HRS can partly remedy the restriction of continuous caster appointed condition.
For this reason, the present invention provides a kind of HRS, and this HRS contains the manganese of 1.70～1.85% (weight).
Preferably, said HRS also contains (by weight percentage):
Carbon 0.29～0.33, silicon 0.22～0.28, aluminium 0.020～0.065, titanium 0.020～0.030.
Preferably, also contain following trace element in the said HRS, said trace element comprises:
Weight accounts for 0.00～0.20% chromium, and weight accounts for 0.00～0.02% molybdenum, and weight accounts for 0.00～0.20% nickel; Weight accounts for 0.00～0.20% copper; Weight accounts for 0.000～0.025% phosphorus, and weight accounts for 0.000～0.015% sulphur, and weight accounts for 0.00～0.010% nitrogen; Weight accounts for 0.00～0.04% niobium, and weight accounts for 0.000～0.04% vanadium.
Preferably, HRS at the average ballistic work of the v-notch of central position is: in the time of 0 ℃, and ballistic work 120～150J; In the time of-20 ℃, ballistic work 70～100J; Ys 495～the 535Mpa of said HRS after the complete modified thermal treatment of diameter, and/or tensile strength 715～750Mpa, and/or elongation 20～25%, and/or relative reduction in area 62～72%.
In addition, the present invention also provides a kind of method of manufacture of HRS, may further comprise the steps:
Raw material is fused into molten steel, in the process of tapping with said molten steel in the content of manganese be controlled at 1.70～1.85% (weight);
Said molten steel is carried out ladle refining;
Said molten steel to behind the ladle refining carries out vacuum refinement;
Said molten steel casting after the vacuum refinement is become strand;
Said strand is rolled into HRS;
The said HRS of thermal treatment.
Preferably, said molten steel also comprises (by weight percentage):
Carbon 0.29～0.33, silicon 0.22～0.28, aluminium 0.020～0.065, titanium 0.020～0.030.
Preferably, said molten steel also comprises trace element, and said trace element comprises:
Weight accounts for 0.00～0.20% chromium, and weight accounts for 0.00～0.02% molybdenum, and weight accounts for 0.00～0.20% nickel; Weight accounts for 0.00～0.20% copper; Weight accounts for 0.000～0.025% phosphorus, and weight accounts for 0.000～0.015% sulphur, and weight accounts for 0.00～0.010% nitrogen; Weight accounts for 0.00～0.04% niobium, and weight accounts for 0.000～0.04% vanadium.
Preferably, the step of the said HRS of thermal treatment comprises:
Said HRS is heated to 920 ± 40 ℃, and is incubated 3～5 hours;
The HRS of insulation after 3～5 hours put into water carry out shrend;
The HRS that will carry out after the shrend is heated to 610 ± 40 ℃, and is incubated 4～5 hours;
The HRS of insulation after 4～5 hours put into water carry out water-cooled.
Preferably, the heating cycle when said strand is rolled into HRS is: preheating section temperature≤820 ℃; 1140 ± 30 ℃ of heating zone temperature; 1170 ± 40 ℃ of soaking zone temperature.
Preferably, said strand is rolled into HRS after, place it in cooling in heap in the air so that the inside of said HRS is segregated in below 1.0 grades, loosen below 1.5 grades.
Preferably, after said molten steel casting becomes strand, said strand is put into burial pit carry out slow cooling.
Preferably, when tapping, the gross weight of the niobium in the said molten steel, vanadium, titanium is not more than 0.12% of said molten steel gross weight.
The present invention has following beneficial effect:
HRS provided by the invention can obtain high obdurability through the content of manganese in the adjustment steel, is applied to the structural part of productive life, can improve the safety and the work-ing life of structural part.
In addition, the method for manufacture of HRS provided by the invention can reach the purpose of crystal grain thinning through the content of controlling manganese in the HRS, thereby improves the obdurability of HRS.And; When making HRS by this method of manufacture; Even rolling compression ratio less than 7, can obtain the HRS of high-strong toughness equally, and the obdurability HRS that is superior to adopting at present the continuously cast bloom of big specification to be produced; In other words, the HRS of this method of manufacture production high-strong toughness can remedy the restriction of continuous caster appointed condition.
As a preferred embodiment of the present invention, through the heating cycle in the controlled rolling process, can improve the interior tissue of continuously cast bloom, thereby improve the obdurability of HRS.
As another preferred embodiment of the present invention,, can further improve the obdurability of HRS through the heat treating regime of suitable HRS.
Description of drawings
Fig. 1 is the technological process of production figure of HRS provided by the invention.
Embodiment
For making those skilled in the art understand technical scheme of the present invention better, HRS provided by the invention and method of manufacture thereof are described in detail below in conjunction with accompanying drawing.
The chemical constitution of HRS provided by the invention and content (weight percent) are: carbon 0.29～0.33, silicon 0.22～0.28, manganese 1.70～1.85, chromium 0.00～0.20; Molybdenum 0.00～0.02, aluminium 0.020～0.065, nickel 0.00～0.20, copper 0.00～0.20; Phosphorus 0.000～0.025, sulphur 0.000～0.015, nitrogen 0.00～0.010, niobium 0.00～0.04; Vanadium 0.000～0.04, titanium 0.020～0.030, surplus is an iron.
This HRS can obtain high-strong toughness through the content of manganese in the control steel, is specially: at the average ballistic work of the v-notch of central position be: in the time of 0 ℃, and ballistic work 120～150J; In the time of-20 ℃, ballistic work 70～100J; Ys σ
s495～535Mpa, and/or tensile strength sigma
b715～750Mpa, and/or elongation δ>=20～25%, and/or relative reduction in area φ 62～72%.HRS provided by the invention is applied to the structural part of productive life, safety and the work-ing life that can improve structural part.
Present embodiment has been developed a kind of method of manufacture of new HRS; Three grades of anchor chains that are used to make high-strong toughness are used hot rolled circular steel; Even the compression ratio of hot rolling material is merely 5: 1; Also can obtain the hot rolled circular steel of high-strong toughness, this method can remedy the working method of the HRS of continuous caster appointed condition restriction.
The operational path of manufacturing HRS provided by the invention may further comprise the steps: FAF (Electric furnace steel making) → LF refining (ladle refining) → VD refining (vacuum refinement) → continuous casting → cutting → cooling (slow cooling) → check → judgement → heating → rolling → cutting → cooling in heap → thermal treatment → ultrasonic+magnetic-particle inspection → (finishing) → judge → pack → weigh → put in storage.Describe in the face of key step in the above-mentioned steps down.
Fig. 1 is the process flow sheet of HRS provided by the invention.See also Fig. 1, the method for manufacture of HRS of the present invention may further comprise the steps:
Step s1 is fused into molten steel and tapping with raw material.
Raw material comprises major ingredient and auxiliary material, and wherein, major ingredient comprises the pig iron and steel scrap, and certainly, the pig iron also can replace with molten iron, perhaps the pig iron and molten iron is added simultaneously.The pig iron and molten iron should meet the relevant requirements of GB/T717-1998, and steel scrap should meet GB/T4223-2004 " iron and steel scrap " relevant requirements.Auxiliary material comprises iron alloy and other auxiliary material material, and wherein, the auxiliary material material should meet the requirement of reference number of a document: SG.J.002-04 " technological standards such as alloy, subsidiary material ".
Present embodiment is an example with the electric furnace of 100 tons of tonnages, and major ingredient is added in the electric furnace, and wherein, the pig iron of adding is no less than 50 tons.Steel scrap is selected for use heavily useless and is sheared material; And, in the steel scrap large-scale cast iron and structural part must not be arranged, and control the content of residual element in the steel scrap; All less than 0.02 (weight) %, the content of residual element meets DNV surveying society (Veritas) standard in the steel scrap like Sn, Sb, B, As percentage composition.Start electric furnace and make major ingredient be fused into molten steel, and made foamy slag, strengthen the dephosphorization of smelting process, make phosphorus content be reduced to 0.009 (weight) below the %.
Baking ladle in the fusing major ingredient, and inspection confirms gas permeable brick ventilative whether good of ladle, taps when treating the ladle red packet.Ladle should adopt the good ladle of slag line.
Tapping when the liquid steel temperature in the electric furnace reaches more than 1680 ℃, tap is not more than 105 tons, and endpoint carbon content is not less than 0.06 (weight) %.
Tap hole volume slag when preventing to tap, the tap hole life-span is in mid-early stage, and the slag of must not tapping down.In tapping process, add auxiliary material, auxiliary material comprises alloy and slag charge, and wherein, alloy comprises silicomanganese, ferromanganese, carburelant and aluminium block, and slag charge comprises lime and pre-melted slag.Add 600kg lime, 500kg pre-melted slag and an amount of alloy during tapping.For practicing thrift the consumption of aluminium block; Reduce smelting cost; The addition sequence of auxiliary material is: silicomanganese, ferromanganese, carburelant, lime, pre-melted slag, aluminium block; Thereby the chemical ingredients of the molten steel after the tapping and content (weight percent) are controlled in the scope of table 1, and wherein, the gross weight of the niobium in the molten steel, vanadium, titanium should be less than or equal to 0.12% of (promptly being not more than) said molten steel gross weight.In addition, alloy and slag charge are under 500 ℃ temperature, to use after the baking.
Through the chemical ingredients of control HRS and the purpose that content can reach crystal grain thinning, thus the obdurability of raising HRS.
In step s 10, except that when tapping molten steel chemical ingredients and content with prior art is different, other smelting technology is all identical with prior art.
Step s20 carries out the LF refining to molten steel.
In the LF refining process, guarantee the operation of slag fluidity and white slag look, protect white slag with carbon dust, ferrosilicon powder and aluminum shot, the white slag hold-time was not less than 20 minutes.Simultaneously, through the composition of sampling analysis molten steel repeatedly, and according to the content strict control carbon dust of steel water oxygen and the add-on of ferrosilicon powder.Can feed aluminum steel early stage in the LF refining, and seat alclad content is controlled in 0.060%.Must not use the ferrosilicon powder deoxidation in the LF refining later stage.
In addition, for making the abundant deoxidation of molten steel, the LF refining time was not less than 40 minutes.Preferably no longer in ladle, added any slag charge at preceding 15 minutes that ladle are hung in the VD stove.And, in whole LF refining process, in time adjust the flow of argon gas, forbid molten steel exposed.
Step s30 carries out the VD refining to molten steel.
Ladle is hung in the VD stove carry out the VD refining.When the VD refining, for accelerating the pumpdown time, generally should shift to an earlier date subscription offerings steam, the vacuum tightness in the VD stove is more than the 66.7Pa, ladle keeps being no less than 15 minutes under the vacuum tightness more than the 66.7Pa.
The VD refining treatment finishes the composition of post analysis molten steel, and the content with aluminium is adjusted to 0.030～0.040 (weight) % then, and the feeding titanium wire is adjusted to 0.02～0.04 (weight) % with the content with titanium.At feeding titanium wire after 5 minutes, stir through argon gas and can make in the molten steel each composition even.Feed silicon-calcium wire afterwards, the amount that feeds silicon-calcium wire usually is not more than 200 meters.Then, add big covering agent and carry out the soft blow argon, the soft blow argon time is no less than 15 minutes, reaches bull ladle after the steel grade teeming temperature.
Need to prove that in actual smelting process, the amount of feeding silicon-calcium wire also can be greater than 200 meters.
Step s40 becomes continuously cast bloom with continuous casting of molten steel.
The matching relationship of table 2 pulling rate and temperature and section
Adopt the high-quality submerged nozzle, mold toasts with covering slag before use, 500～650 ℃ of storing temperatures, and preferred 600 ℃, storing time is more than 3 hours.During continuous casting, adopt the argon gas seal protection.Big water-coating port accomplishes that the superheating temperature of molten steel is controlled about 30 ℃ from opening, and notes the coupling of pulling rate and temperature simultaneously, to water the continuously cast bloom that casts out required specification and specified length.Pulling rate is relevant with the section of temperature (superheating temperature) and HRS, and along with the increase pulling rate of HRS cross section diameter falls for a short time, and the low more pulling rate of temperature is big more, and concrete matching relationship is seen table 2.At last, continuously cast bloom is put into the burial pit slow cooling, shop, burial pit bottom one deck steel billet, add a cover at the top, and continuously cast bloom is placed back taking-up more than 48 hours at burial pit.
Need to prove that the afterbody of the head of the continuously cast bloom of continuous casting first stove and last stove continuously cast bloom of continuous casting should have enough excision amounts.
Step s50 is rolled into HRS with continuously cast bloom.
In the process of rolling continuous casting base, the heating cycle of process furnace is: preheating section temperature≤820 ℃; 1140 ± 30 ℃ of heating zone temperature; 1170 ± 40 ℃ of soaking zone temperature.And, guarantee that continuously cast bloom evenly pass through to burn, after the rolling completion, cold bed under the HRS, and in air cooling in heap.
Through the heating cycle in the controlled rolling process, can improve the interior tissue of continuously cast bloom, according to " GB/T1979-2001 structure iron macrostructure defective grading figure " evaluation, the continuously cast bloom interior tissue is segregated in below 1.0 grades, loosens below 1.5 grades.The improvement of the interior tissue of continuously cast bloom can improve the obdurability of HRS.
Step s60, thermal treatment HRS (modifier treatment).
Modifier treatment technology is adopted in the full diameter integral thermal treatment of HRS, that is, quench earlier, carries out tempering again.Be specially:
Quench, HRS is incubated 3～6 hours under 920 ± 40 ℃ of temperature, preferred 4 hours, put it into then and carry out shrend in the water.
Tempering, HRS is incubated 3～6 hours under 610 ± 40 ℃ temperature, preferred 4.5 hours, put it into then and carry out water-cooled in the water.
Quenching among the step s60 and tempering temperature all exceed 30 ℃ than the normal temperature that adopts in the prior art, and this can improve the inner ferritic content of HRS, and then improve the obdurability of HRS.
The obdurability of the HRS that the hot-rolled steel making method that provides through present embodiment obtains is seen table 3.
Can know by table 3; The obdurability of the HRS that obtains through hot-rolled steel making method that present embodiment provided after modified can not only satisfy the request for utilization of three grades of anchor chains with hot rolled circular steel, and each item performance of obdurability all to be superior to be the obdurability of the HRS of acquisition in 7: 1 at present through compression ratio.
The obdurability characteristic of the HRS that table 3 present embodiment provides
Need to prove; Method and processing parameter that method that present embodiment step s20, step s30 and step s40 are adopted and processing parameter are corresponding with prior art are all same or similar; In other words, present embodiment step s20, step s30 and step s40 all can adopt prior art disclosed method and processing parameter to realize.
What also need explain is; Method of manufacture through HRS provided by the invention can be used to make three grades of anchor chains and use hot rolled circular steel; Can also be used to make the hot rolled circular steel that other requirement has the high-strong toughness characteristic; And be not limited to hot rolled circular steel, and can be the HRS of other shapes such as hot-rolled square steel.
The method of manufacture of HRS provided by the invention can reach the purpose of crystal grain thinning through the content of chemical ingredients and content, especially manganese of control HRS, thereby improves the obdurability of HRS.And; When making HRS by this method of manufacture; Even rolling compression ratio less than 7, can obtain the HRS of high-strong toughness equally, and the obdurability HRS that is superior to adopting at present the continuously cast bloom of big specification to be produced; In other words, the HRS of this method of manufacture production high-strong toughness can remedy the restriction of continuous caster appointed condition.
It is understandable that above embodiment only is the illustrative embodiments that adopts for principle of the present invention is described, yet the present invention is not limited thereto.For the one of ordinary skilled in the art, under the situation that does not break away from spirit of the present invention and essence, can make various modification and improvement, these modification also are regarded as protection scope of the present invention with improving.
Claims (12)
1. a HRS is characterized in that, this HRS contains weight and accounts for 1.70～1.85% manganese.
2. HRS according to claim 1 is characterized in that, said HRS also contains:
Weight accounts for 0.29～0.33% carbon, and weight accounts for 0.22～0.28% silicon, and weight accounts for 0.020～0.065% aluminium weight and accounts for 0.020～0.030% titanium.
3. HRS according to claim 2 is characterized in that, also contains following trace element in the said HRS, and said trace element comprises:
Weight accounts for 0.00～0.20% chromium, and weight accounts for 0.00～0.02% molybdenum, and weight accounts for 0.00～0.20% nickel; Weight accounts for 0.00～0.20% copper; Weight accounts for 0.000～0.025% phosphorus, and weight accounts for 0.000～0.015% sulphur, and weight accounts for 0.00～0.010% nitrogen; Weight accounts for 0.00～0.04% niobium, and weight accounts for 0.000～0.04% vanadium.
4. HRS according to claim 1 is characterized in that, HRS at the average ballistic work of the v-notch of central position is: in the time of 0 ℃, and ballistic work 120～150J; In the time of-20 ℃, ballistic work 70～100J; Said HRS after the modified thermal treatment of full diameter: ys 495～535Mpa, and/or tensile strength 715～750Mpa, and/or elongation 20～25%, and/or relative reduction in area 62～72%.
5. the method for manufacture of a HRS is characterized in that, may further comprise the steps:
Raw material is fused into molten steel, in the process of tapping, contains weight control in said molten steel at 1.70～1.85% manganese;
Said molten steel is carried out ladle refining;
Said molten steel to behind the ladle refining carries out vacuum refinement;
Said molten steel casting after the vacuum refinement is become strand;
Said strand is rolled into HRS;
The said HRS of thermal treatment.
6. method of manufacture according to claim 5 is characterized in that, said molten steel also comprises:
Weight accounts for 0.29～0.33% carbon, and weight accounts for 0.22～0.28% silicon, and weight accounts for 0.020～0.065% aluminium, and weight accounts for 0.020～0.030% titanium.
7. method of manufacture according to claim 6 is characterized in that said molten steel also comprises trace element, and said trace element comprises:
Weight accounts for 0.00～0.20% chromium, and weight accounts for 0.00～0.02% molybdenum, and weight accounts for 0.00～0.20% nickel; Weight accounts for 0.00～0.20% copper; Weight accounts for 0.000～0.025% phosphorus, and weight accounts for 0.000～0.015% sulphur, and weight accounts for 0.00～0.010% nitrogen; Weight accounts for 0.00～0.04% niobium, and weight accounts for 0.000～0.04% vanadium.
8. method of manufacture according to claim 5 is characterized in that, the step of the said HRS of thermal treatment comprises:
Said HRS is heated to 920 ± 40 ℃, and is incubated 3～5 hours;
The HRS of insulation after 3～5 hours put into water carry out shrend;
The HRS that will carry out after the shrend is heated to 610 ± 40 ℃, and is incubated 4～5 hours;
The HRS of insulation after 4～5 hours put into water carry out water-cooled.
9. method of manufacture according to claim 5 is characterized in that, the heating cycle when said strand is rolled into HRS is: preheating section temperature≤820 ℃; 1140 ± 30 ℃ of heating zone temperature; 1170 ± 40 ℃ of soaking zone temperature.
10. method of manufacture according to claim 9 is characterized in that, said strand is rolled into HRS after, place it in cooling in heap in the air so that the inside of said HRS is segregated in below 1.0 grades, loosen below 1.5 grades.
11. method of manufacture according to claim 5 is characterized in that, after said molten steel casting becomes strand, said strand is put into burial pit carry out slow cooling.
12. method of manufacture according to claim 5 is characterized in that, when tapping, the gross weight of the niobium in the said molten steel, vanadium, titanium is not more than 0.12% of said molten steel gross weight.
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Cited By (7)
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| CN107304458A (en) * | 2016-04-21 | 2017-10-31 | 北大方正集团有限公司 | A kind of hot-rolled steel and its manufacture method, mooring cable and its manufacture method |
| CN108083792A (en) * | 2016-11-21 | 2018-05-29 | 宜兴市帝洲新能源科技有限公司 | A kind of hinge material of hardware appliance |
| CN108760524A (en) * | 2018-03-19 | 2018-11-06 | 江阴兴澄特种钢铁有限公司 | A kind of simulation experiment method reducing crackle tendency in the curling of hot rolled plate containing P |
| CN109234645A (en) * | 2018-09-30 | 2019-01-18 | 镇江宝海船舶五金有限公司 | A kind of composite material and preparation method thereof applied in marine anchor chain |
| CN110923395A (en) * | 2019-12-26 | 2020-03-27 | 舞阳钢铁有限责任公司 | Method for smelting wind power steel Q345D by electric furnace |
| CN111172473A (en) * | 2020-02-24 | 2020-05-19 | 江苏利淮钢铁有限公司 | Steel for D-shaped anchor chain terminal shackle |
| CN111655889A (en) * | 2018-01-26 | 2020-09-11 | 日本制铁株式会社 | Steel for anchor chain and anchor chain |
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| CN101602078A (en) * | 2009-07-03 | 2009-12-16 | 马景怡 | Make the method for section steel with high strength and high toughness with hot rolled steel plate |
| CN101838769A (en) * | 2010-04-09 | 2010-09-22 | 武汉钢铁(集团)公司 | Steel for hot rolling U type steel sheet pile with tensile strength more than or equal to 600MPa and production method thereof |
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| CN101602078A (en) * | 2009-07-03 | 2009-12-16 | 马景怡 | Make the method for section steel with high strength and high toughness with hot rolled steel plate |
| CN101838769A (en) * | 2010-04-09 | 2010-09-22 | 武汉钢铁(集团)公司 | Steel for hot rolling U type steel sheet pile with tensile strength more than or equal to 600MPa and production method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107304458A (en) * | 2016-04-21 | 2017-10-31 | 北大方正集团有限公司 | A kind of hot-rolled steel and its manufacture method, mooring cable and its manufacture method |
| CN107304458B (en) * | 2016-04-21 | 2019-06-25 | 北大方正集团有限公司 | A kind of hot-rolled steel and its manufacturing method, mooring cable and its manufacturing method |
| CN108083792A (en) * | 2016-11-21 | 2018-05-29 | 宜兴市帝洲新能源科技有限公司 | A kind of hinge material of hardware appliance |
| CN111655889A (en) * | 2018-01-26 | 2020-09-11 | 日本制铁株式会社 | Steel for anchor chain and anchor chain |
| CN108760524A (en) * | 2018-03-19 | 2018-11-06 | 江阴兴澄特种钢铁有限公司 | A kind of simulation experiment method reducing crackle tendency in the curling of hot rolled plate containing P |
| CN109234645A (en) * | 2018-09-30 | 2019-01-18 | 镇江宝海船舶五金有限公司 | A kind of composite material and preparation method thereof applied in marine anchor chain |
| CN110923395A (en) * | 2019-12-26 | 2020-03-27 | 舞阳钢铁有限责任公司 | Method for smelting wind power steel Q345D by electric furnace |
| CN110923395B (en) * | 2019-12-26 | 2021-11-16 | 舞阳钢铁有限责任公司 | Method for smelting wind power steel Q345D by electric furnace |
| CN111172473A (en) * | 2020-02-24 | 2020-05-19 | 江苏利淮钢铁有限公司 | Steel for D-shaped anchor chain terminal shackle |
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| CN102703809B (en) | 2014-06-04 |
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