CN102764959B - Manufacturing technique of 150-300mm thick low-alloy high-strength steel plate - Google Patents
Manufacturing technique of 150-300mm thick low-alloy high-strength steel plate Download PDFInfo
- Publication number
- CN102764959B CN102764959B CN201210263864.3A CN201210263864A CN102764959B CN 102764959 B CN102764959 B CN 102764959B CN 201210263864 A CN201210263864 A CN 201210263864A CN 102764959 B CN102764959 B CN 102764959B
- Authority
- CN
- China
- Prior art keywords
- welding
- continuous casting
- steel plate
- blank
- vacuum
- 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
Landscapes
- Arc Welding In General (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a manufacturing technique of a 150-300mm thick low-alloy high-strength steel plate. The chemical components of the used continuous casting slabs are as follows: 0.14-0.20% of C, 0.20-0.50% of Si, 1.10-1.60% of Mn, equal to or less than 0.010% of S and equal to or less than 0.20% of micro-alloyed elements; and at least two continuous casting slabs are provided with grooves, overlapped and welded into a big-thickness continuous casting blank by using a combined welding technique of gas shielded welding, submerged-arc welding and electron-bombardment welding, and then, the blank is arranged in a bogie-type furnace or a soaking pit furnace for heating, rolled by a thick plate rolling machine after being discharged from the furnace, cooled under control and subjected to heat treatment so as to obtain the steel plate. The produced low-alloy high-strength steel plate has the following characteristics that the comprehensive mechanical properties are excellent, the inspection qualified rate is higher than 98%, the Q345E level steel plate low-temperature (-40) DEG C impact absorbing energy is more than 160J averagely, the Z-direction tensile section shrinkage factor is more than 60%, and the blank yield is higher than 88%.
Description
Technical field
The invention belongs to metal material field, relate to a kind of common continuous casting steel billet production 150～300mm thick low-alloy high-strength steel plate method of manufacturing technology of utilizing.
Background technology
150～300mm low-alloy high-strength steel plate is widely used in the national economy fields such as heavy-duty machinery manufacture, skyscraper, bridge, electric power.The intensity that product requirement is higher, good plasticity and toughness and internal soundness.Be subject to the restriction of continuous casting material thickness, domesticly with continuous casting billet, produce to protect flaw detection guaranteed cost super-thick steel plate generally the thickest 150mm generally adopts the forms such as static ingot, ESR ingot with upper steel plate to 150mm, production process exists lumber recovery low, the shortcomings such as energy consumption is high, and production efficiency is low.
Summary of the invention
The present invention breaks through common continuous casting billet sotck thinkness restriction, provides a kind of and utilizes existing continuous casting steel billet to produce the above thickness low-alloy high-strength steel plate of guarantor flaw detection guaranteed cost 150mm manufacturing technique method, can realize the production that maximum ga(u)ge 300mm protects flaw detection guaranteed cost steel plate.
The present invention is achieved through the following technical solutions: a kind of 150～300mm thick low-alloy high-strength steel plate method of manufacturing technology, it is characterized in that,
(1) the surrounding same size with two above (comprising two) (is that length, width equate, thickness can be different) continuous casting steel billet be raw material, continuous casting steel billet used comprises following chemical composition (mass percent, wt%): C0.14～0.20%, Si0.20～0.50%, Mn1.10～1.60%, S≤0.010%, micro alloying element (Nb+V+Ti)≤0.20%;
(2) three of all continuous casting steel billets limits are cut to or the form finished edge such as plane, milling groove depth 10-40mm, bevel angle 15-35 ° by flame; Continuous casting steel billet is stacked together, half-twist is vertically placed, and group aligns together, then adopt the welding manner of gas shielded arc welding, to continuous casting steel billet, there is the side seam on three faces of groove to carry out bottoming welding, adopt Lincoln weld to fill and cover welding again, finally the side seam on residue face is carried out under high vacuum to vacuum electron beam and weld, assembly welding becomes large thickness blank; Or square groove, is stacked together continuous casting steel billet, and half-twist vertically places, and group aligns together, then all adopts the mode of vacuum electron beam welding that 4 faces are welded into large thickness blank;
(3) the large thickness blank that butt welding connects adopts bogie-type furnace or soaking pit to heat, and tapping temperature is controlled at 1160～1280 ℃;
(4) come out of the stove after rolling, 1000～1150 ℃ of first stage start rolling temperatures, 820～920 ℃ of second stage start rolling temperatures, workpiece thickness is not less than 1.4 times of finished product thickness;
(5) to rolling rear steel plate, carry out weak water cooling, cooling velocity <5 ℃/S, 620～780 ℃ of surperficial red temperatures;
(6) steel plate is carried out to normalizing heat treatment, 880～930 ℃ of heat treatment temperatures, heat insulating coefficient 1.2～2.0min/mm.
Described step (2) gas shielded arc welding, its gage of wire 1.2-2.0mm, weldingvoltage 20-35V, welding current 120-400A, speed of welding 250-600mm/min, dry extension of electrode degree 15-25mm, protective gas CO
2or Ar+CO
2, shield gas flow rate 15-25L/min, fusion penetration 5-20mm;
Described step (2) Lincoln weld, its gage of wire 4.0-6.0mm, weldingvoltage 30-45V, welding current 250-1600A, speed of welding 250-600mm/min, dry extension of electrode degree 25-45mm, fusion penetration 10-30mm;
Described step (2) vacuum electron beam welding, its weldingvoltage 30-150KV, vacuum is higher than 1 * 10
-1pa, welding current 100-500mA, speed of welding 50-700mm/min, fusion penetration 20-50mm.
Described step (2) continuous casting steel billet, by machine-tooled methods such as milling machines, planer, removes the iron scale, greasy dirt on surface to be composite etc. before its welding, realizes surface clean.
The continuous casting steel billet of described step (1) is the continuous casting steel billet through pneumatic steelmaking, external refining, continuous casting working procedure, in described external refining operation, will carry out degassed processing, requires: more than lower dwell time of≤100Pa >=10 minute.
This technology utilization, through the continuous casting steel billet of pneumatic steelmaking, external refining, is taked the route of multicomponent microalloying Composition Design, and chemical composition as mentioned above; Design principle is as follows: C, Mn are main intensified element, for reducing production costs, is guaranteeing under the prerequisite of easy weldability, and C, Mn content are as far as possible high; S constituent content reduces as far as possible, to reduce the impact on internal quality of steel plate such as steel inclusion; The microalloy elements such as Nb, V, Ti suppress austenitic Deformation recrystallization and stop its grain growth in heating process, and separate out by their strain inducing of carboritride, and steel is carried out to precipitation strength.
Employing external refining is degassed, and more than requiring following dwell time >=10 of 100Pa minute, its main purpose one is for fully degassed, reduces as far as possible the content of the gases such as hydrogen in steel, reduces the impact on internal quality of steel plate such as hydrogen induced cracking; The 2nd, for the field trash in molten steel is floated as far as possible, reduce the content of steel inclusion.
By two or above continuous casting material limit portion cuts by flame or the form finished edge such as plane, milling, groove depth 10-40mm, bevel angle 15-35 °; After being stacked together after Surface Machining cleaning, by gas shielded arc welding, submerged-arc welding and three kinds of assembled welding process of electron-bombardment welding, by blank surrounding Combination Welding together, assembly welding becomes large thickness blank; The large thickness blank that makes full use of formation increases the compression ratio of mill product steel plate, and because weld interface place blank is high vacuum state, in subsequent thermal processing deformation process, very easily seam together, forms an integral body, is consistent with matrix.
The large thickness blank that butt welding connects adopts bogie-type furnace or soaking pit to heat, and suitably increases high temperature section heat insulating coefficient, guarantees to grill thoroughly, burns evenly.
In the operation of rolling, adopt two-stage rolling.In first stage rolling, carry out high temperature low speed and depress greatly rolling, by recrystallization process crystal grain thinning repeatedly; Two-stage controlled rolling, increases phase deformed nucleus point crystal grain thinning, and 1.4 times of finished product thicknesses of intermediate blank are in order to guarantee the cumulative deformation of the two-stage operation of rolling.
To rolling rear steel plate, carry out weak water cooling, cooling velocity <5 ℃/S, 620～780 ℃ of surperficial red temperatures.Rolling rear water-cooled is in order to be cooled to faster transformation temperature, prevents that crystal grain from too growing up, and low cooling velocity is in order to reduce the structure property difference in steel plate thickness direction.
Steel plate is carried out to normalizing heat treatment, by normalizing heat treatment, make steel plate even tissue, increase plasticity and toughness and the steel plate thickness direction structure property uniformity of steel plate.
By above manufacture method, 150 ~ 300mm low-alloy high-strength steel plate of producing possesses good comprehensive mechanical property, flaw detection qualification rate reaches more than 98%, Q345E level steel plate low temperature-40 ℃ impact absorbing energy is on average more than 160J, the Z-direction stretching contraction percentage of area reaches more than 60%, and base material recovery rate is more than 88%.Production technology is workable, and cost is low, and production efficiency is high.Especially the assembly welding mode of gas shielded arc welding, submerged-arc welding and electron-bombardment welding, has following advantage:
1, first the present invention adopts gas shielded arc welding to carry out bottoming welding to three of continuous casting steel billet group side seams, completes automatically and efficiently that basis is welded and be that next step submerged-arc welding is ready under the prerequisite of composition surface produce not being polluted; Then to these three side seams, adopt again the mode of Lincoln weld to complete rapidly the filling welding of weld seam, finally will remain a side seam and apply electron-bombardment welding technique under vacuum environment, complete the final welding of blank; Therefore relative four limit electron-bombardment welding techniques have increased substantially welding efficiency.
2, the present invention adopts permanent order to carry out the successively technique of welding; it not the simple combination of gas shielded arc welding, submerged-arc welding and electron-bombardment welding; but the inherent quality requirement of preparing in strict accordance with large thickness slab; at the outstanding advantage that has taken into full account these welding manners, and by the result of its optimum organization.Because can not polluting slab group faying face, gas shielded arc welding can not realize automation raising welding efficiency simultaneously, Lincoln weld is than the more efficient a kind of welding manner of gas shielded arc welding, and gas shielded arc welding and submerged-arc welding operation are all carried out under home, during unlike vacuum welding, need to repeatedly pass in and out vacuum chamber, thereby vacuum pumping repeatedly, therefore significantly reduced the vacuum operation time, this Combination Welding order and mode can increase substantially welding efficiency under the prerequisite that guarantees welding requirements (particularly the cleanliness factor on composition surface being required), reduced production cost.
3, the present invention, because slab group is that vertical direction is placed, therefore can guarantee to keep between blank the gap of 1mm left and right, and can not form local closed area.Electron-bombardment welding has guaranteed that final being welded in high vacuum completes, avoided place, composition surface to exist air impact to roll the possibility of rear quality, the existing vacuum welding technique of comparing, only need disposable vacuumizing and welding operation, simultaneously because slab group is vertically to place welding, while having avoided level welding, mechanical mechanism and the descending operation of complexity, increased substantially welding efficiency.
4, further experiment of the present invention proves, large thickness slab manufacturing process of the present invention can substitute the manufacturing process under vacuum environment completely, large thickness slab and the super-thick steel plate internal soundness of producing are good, and excellent performance reaches the level of vacuum composite rolling technique completely; And compare with vacuum composite rolling technique, the present invention is simple to operate, small investment, cost is more than 80%, production efficiency is significantly enhanced about more than once, productive organization is flexible, be applicable to the large thickness slab of mass industrialized production, being especially applicable to the electron beam welding of thickness >=800mm(vacuum cannot produce in batches) slab produce.
Accompanying drawing explanation
Fig. 1 is the original strand superposed surfaces of the steel plate metallographic structure figure that embodiment 1 produces.
The specific embodiment
Below in conjunction with specific embodiment, the manufacturing process of this kind 150～300mm low-alloy high-strength steel plate is described in detail.
Embodiment 1: produce the thick Q345E low-alloy high-strength steel plate of 254mm:
1) high cleanliness smelting molten steel, molten steel carries out the two refinings of LF+RH after converter smelting, LF refining fully remove be mingled with, desulfurization, RH application of vacuum keeps vacuum 100Pa lower 10 minutes, gas after refining [O] 11ppm, [H] 1.5ppm.
2) continuous casting of molten steel process adopts whole process protection cast, and uses electromagnetic agitation, and the continuous casting billet of two thick same sizes of 250mm is produced in constant speed cast, and smelting component analysis result is as following table:
Table 1 embodiment 1 continuous casting billet chemical composition
| Chemical composition | C | Si | Mn | P | S | Nb | V | Ti |
| Content wt% | 0.18 | 0.25 | 1.46 | 0.010 | 0.004 | 0.04 | 0.035 | 0.02 |
3) by three lateral dominance flame cutting method finished edges of the thick continuous casting steel billet of two 250mm of having produced, groove depth 25mm, 25 ° of bevel angles.
4) blank that completes finished edge is processed by milling machine, removed surperficial iron scale, greasy dirt etc., realize surface cleaning.
5) after the blank processing is stacked together, half-twist is vertically placed, and group aligns together.
6) adopt the welding manner of gas shielded arc welding, to processing three side seams of groove, carry out bottoming welding, gage of wire 2.0mm, weldingvoltage 20V, welding current 200A, speed of welding 300mm/min, dry extension of electrode degree 25mm, protective gas CO
2, shield gas flow rate 20L/min, fusion penetration 15mm.
7) by three side seams after gas shielded arc welding bottoming welding, then adopt Lincoln weld to fill and cover welding, gage of wire 5.0mm, weldingvoltage 30V, welding current 400A, speed of welding 350mm/min, dry extension of electrode degree 30mm, fusion penetration 20mm.
8) remaining sides is sewn under condition of high vacuum degree and adopts vacuum electron beam welding, finally form the large thickness blank of 500mm.Weldingvoltage 100KV, vacuum 1.5 * 10
-2pa, welding current 300mA, speed of welding 150mm/min, fusion penetration 35mm.
9) adopt bogie-type furnace to heat 500mm thick stock material, total heat time is more than 12 hours, 1280 ℃ of tapping temperatures.
10) 1120 ℃ of roughing open rollings in process processed, rough rolling process strengthens every time drafts as far as possible, the thick 350mm of intermediate blank; 880 ℃ of finish rolling start rolling temperatures, control steel plate template by the adjustment of drafts in the operation of rolling good.
11) after, steel plate carries out weak water-cooled, 4 ℃/S of cooling velocity, 740 ℃ of cooling rear surface of steel plate red temperatures.
12) plate carries out normalizing heat treatment, 920 ℃ ± 10 ℃ of heat treatment temperatures, heat insulating coefficient 1.5min/mm.
Utilize the original strand superposed surfaces of steel plate and the matrix of this explained hereafter in full accord, obtained good fusion, as shown in Figure 1.
Embodiment 2 produces the thick Q345E low-alloy high-strength steel plate of 254mm:
1) high cleanliness smelting molten steel, molten steel carries out the two refinings of LF+RH after converter smelting, LF refining fully remove be mingled with, desulfurization, RH application of vacuum keeps vacuum 100Pa lower 12 minutes, gas after refining [O] 10ppm, [H] 1.2ppm.
2) continuous casting of molten steel process adopts whole process protection cast, and uses electromagnetic agitation, and the continuous casting billet of two thick same sizes of 250mm is produced in constant speed cast, and smelting component analysis result is as following table:
Table 2 embodiment 2 continuous casting billet chemical compositions
| Chemical composition | C | Si | Mn | P | S | Nb | V | Ti |
| Content wt% | 0.17 | 0.27 | 1.42 | 0.008 | 0.005 | 0.05 | 0.04 | 0.02 |
3) these two continuous casting steel billets are processed by milling machine, removed surperficial iron scale, greasy dirt etc., realize surface cleaning.
4) after the blank processing is stacked together, half-twist is vertically placed, and group aligns together.
5) four edges is sewn under condition of high vacuum degree and adopts vacuum electron beam welding, finally form the large thickness blank of 500mm.Weldingvoltage 100KV, vacuum 1.5 * 10
-2pa, welding current 300mA, speed of welding 150mm/min, fusion penetration 35mm.
6) adopt bogie-type furnace to heat 500mm thick stock material, total heat time is more than 12 hours, 1280 ℃ of tapping temperatures.
7) 1120 ℃ of roughing open rollings in process processed, rough rolling process strengthens every time drafts as far as possible, the thick 350mm of intermediate blank; 880 ℃ of finish rolling start rolling temperatures, control steel plate template by the adjustment of drafts in the operation of rolling good.
8) after, steel plate carries out weak water-cooled, 4 ℃/S of cooling velocity, 740 ℃ of cooling rear surface of steel plate red temperatures.
9) plate carries out normalizing heat treatment, 920 ℃ ± 10 ℃ of heat treatment temperatures, heat insulating coefficient 1.5min/mm.
To the steel plate of embodiment 1 and embodiment 2 by standard stretch, the experiment such as impact, Z-direction, flaw detection detects, it is excellent that properties detects index, as shown in table 3 below.The assembly welding mode of the gas shielded arc welding of embodiment 1, submerged-arc welding and vacuum electron beam welding (being called for short assembly welding mode) is compared with the vacuum electron beam welding mode of embodiment 2; vacuumize number of times, production cycle and indicator of power consumption as shown in table 4; as can be seen from Table 4: assembly welding mode significantly improves than vacuum electron beam welding mode production efficiency, and energy-conservation.
The performance indications of steel plate for the wind-power tower of table 3 embodiment 1 and embodiment 2 preparations
Two kinds of welding manner leading indicator contrasts of table 4.
| Technique | Vacuumize number of times | Production cycle (h) | Power consumption (unit/t) |
| Embodiment 2 vacuum electron beam welding modes | 2 | 24 | 32 |
| Embodiment 1 assembly welding mode | 1 | 10 | 18 |
Claims (2)
1. 150～300mm thick low-alloy high-strength steel plate method of manufacturing technology, is characterized in that,
(1) take the continuous casting steel billet of two above surrounding same sizes is raw material, continuous casting steel billet used comprises following chemical composition: C 0.14～0.20 wt %, Si 0.20～0.50 wt %, Mn 1.10～1.60 wt %, S≤0.010 wt %, micro alloying element≤0.20 wt %; Described micro alloying element is Nb+V+Ti;
(2) to three of all continuous casting steel billets limit finished edges, groove depth 10-40mm, bevel angle 15-35 °; Continuous casting steel billet is stacked together, half-twist is vertically placed, and group aligns together, then adopt the welding manner of gas shielded arc welding, to continuous casting steel billet, there is the side seam on three faces of groove to carry out bottoming welding, adopt Lincoln weld to fill and cover welding again, finally the side seam on residue face is carried out under high vacuum to vacuum electron beam and weld, assembly welding becomes large thickness blank;
Described vacuum electron beam welding, its weldingvoltage 30-150KV, vacuum is higher than 1 * 10
-1pa, welding current 100-500mA, speed of welding 50-700mm/min, fusion penetration 20-50mm;
Described gas shielded arc welding, its gage of wire 1.2-2.0mm, weldingvoltage 20-35V, welding current 120-400A, speed of welding 250-600mm/min, dry extension of electrode degree 15-25 mm, protective gas CO
2or Ar+CO
2, shield gas flow rate 15-25L/min, fusion penetration 5-20mm;
Described Lincoln weld, its gage of wire 4.0-6.0mm, weldingvoltage 30-45V, welding current 250-1600A, speed of welding 250-600mm/min, dry extension of electrode degree 25-45 mm, fusion penetration 10-30mm;
(3) the large thickness blank that butt welding connects adopts bogie-type furnace or soaking pit to heat, and tapping temperature is controlled at 1160～1280 ℃;
(4) come out of the stove after rolling, 1000～1150 ℃ of first stage start rolling temperatures, 820～920 ℃ of second stage start rolling temperatures, workpiece thickness is not less than 1.4 times of finished product thickness;
(5) to rolling rear steel plate, carry out weak water cooling, cooling velocity <5 ℃/S, 620～780 ℃ of surperficial red temperatures;
(6) steel plate is carried out to normalizing heat treatment, 880～930 ℃ of heat treatment temperatures, heat insulating coefficient 1.2～2.0min/mm.
2. a kind of 150～300mm thick low-alloy high-strength steel plate method of manufacturing technology as claimed in claim 1, it is characterized in that, the continuous casting steel billet of described step (1) is the continuous casting steel billet through pneumatic steelmaking, external refining, continuous casting working procedure, in described external refining operation, to carry out degassed processing, require: lower dwell time of≤100Pa >=10 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210263864.3A CN102764959B (en) | 2012-07-27 | 2012-07-27 | Manufacturing technique of 150-300mm thick low-alloy high-strength steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210263864.3A CN102764959B (en) | 2012-07-27 | 2012-07-27 | Manufacturing technique of 150-300mm thick low-alloy high-strength steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102764959A CN102764959A (en) | 2012-11-07 |
| CN102764959B true CN102764959B (en) | 2014-11-19 |
Family
ID=47092651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210263864.3A Expired - Fee Related CN102764959B (en) | 2012-07-27 | 2012-07-27 | Manufacturing technique of 150-300mm thick low-alloy high-strength steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102764959B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108273A (en) * | 2015-08-10 | 2015-12-02 | 安徽富煌钢构股份有限公司 | Welding process for high-strength type steel plate |
| CN116175098A (en) * | 2023-02-27 | 2023-05-30 | 鞍钢股份有限公司 | Production method of extra-thick module steel for cold working die |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4321373B2 (en) * | 2004-06-15 | 2009-08-26 | Ｊｆｅスチール株式会社 | Manufacturing method of extra heavy steel sheet |
| CN101773931A (en) * | 2009-12-30 | 2010-07-14 | 东北大学 | Method for rolling special thick board by means of vacuum compositing |
| CN101879645A (en) * | 2010-07-06 | 2010-11-10 | 蓬莱巨涛海洋工程重工有限公司 | Marine engineering large thick steel plate submerged arc welding process method in low-temperature environment |
| CN101590596B (en) * | 2009-06-25 | 2010-12-29 | 莱芜钢铁集团有限公司 | Method for manufacturing extra-thick plate blank by accumulative roller welding process |
| CN102009332A (en) * | 2010-09-15 | 2011-04-13 | 北京科技大学 | Method for producing super-thick plate by packrolling welding process |
| CN102199725A (en) * | 2011-05-13 | 2011-09-28 | 莱芜钢铁集团有限公司 | Bridge structural steel and production method thereof |
| CN102319951B (en) * | 2011-08-30 | 2013-07-17 | 哈尔滨汽轮机厂有限责任公司 | Electron beam welding method for large-thickness diaphragms of steam turbines |
-
2012
- 2012-07-27 CN CN201210263864.3A patent/CN102764959B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4321373B2 (en) * | 2004-06-15 | 2009-08-26 | Ｊｆｅスチール株式会社 | Manufacturing method of extra heavy steel sheet |
| CN101590596B (en) * | 2009-06-25 | 2010-12-29 | 莱芜钢铁集团有限公司 | Method for manufacturing extra-thick plate blank by accumulative roller welding process |
| CN101773931A (en) * | 2009-12-30 | 2010-07-14 | 东北大学 | Method for rolling special thick board by means of vacuum compositing |
| CN101879645A (en) * | 2010-07-06 | 2010-11-10 | 蓬莱巨涛海洋工程重工有限公司 | Marine engineering large thick steel plate submerged arc welding process method in low-temperature environment |
| CN102009332A (en) * | 2010-09-15 | 2011-04-13 | 北京科技大学 | Method for producing super-thick plate by packrolling welding process |
| CN102199725A (en) * | 2011-05-13 | 2011-09-28 | 莱芜钢铁集团有限公司 | Bridge structural steel and production method thereof |
| CN102319951B (en) * | 2011-08-30 | 2013-07-17 | 哈尔滨汽轮机厂有限责任公司 | Electron beam welding method for large-thickness diaphragms of steam turbines |
Non-Patent Citations (2)
| Title |
|---|
| 于均，王宏启.机械工程材料.《机械工程材料》.冶金工业出版社,2008,第137-139页. * |
| 邹莉.机械工程材料及应用.《机械工程材料及应用》.重庆大学出版社,2005,第137页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102764959A (en) | 2012-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102764962B (en) | Manufacturing technique of heavy piece-weight thick steel plate used for offshore wind turbine tower tube | |
| CN102896466B (en) | Production method of 150-400mm thick steel plate for plastic moulds | |
| CN102764961B (en) | Technique for manufacturing 150-400mm thick carbon constructional steel plate by using continuous casting slabs | |
| CN102416404B (en) | Method for producing cold-rolled steel strips | |
| JP5928654B2 (en) | Thick and high toughness high strength steel sheet and method for producing the same | |
| CN102764936B (en) | Big-thickness slab manufacturing technique | |
| CN106544590B (en) | 1000MPa grade high ductility high-performance uniformity easily welds super-thick steel plate and its manufacturing method | |
| CN102764960B (en) | Method for manufacturing composite steel plate for hydrogenation reaction kettle barrel | |
| CN102672447B (en) | Manufacturing method of high-purity nickel strap | |
| CN109112423B (en) | Super-thick alloy steel plate with excellent low-temperature toughness and preparation method thereof | |
| CN107385328B (en) | The low-alloy super-thick steel plate with superior internal quality, low-temperature impact toughness and anti-lamellar tearing performance of two base laminating productions | |
| CN108239725B (en) | High-shear-strength rolled composite steel plate and manufacturing method thereof | |
| KR20160124847A (en) | High toughness and high tensile strength thick steel plate and production method therefor | |
| CN102649203B (en) | Gas shielded welding wire and coil rod, with low cost, for nuclear power containment shell | |
| CN105239003A (en) | Thick gauge steel plate for offshore platform and production method of thick gauge steel plate | |
| CN102689104B (en) | Gas shielded welding wire and wire rod for nuclear containment | |
| CN103834873B (en) | A kind of heavy thickness boiler pot cylinder low-alloy high-strength steel plate and manufacture method thereof | |
| CN105274433A (en) | Super-thick steel plate and composite production method thereof | |
| CN104233129B (en) | A kind of production method of high-magnesium aluminum alloy thin plate | |
| CN102764959B (en) | Manufacturing technique of 150-300mm thick low-alloy high-strength steel plate | |
| CN105063503A (en) | Highly abrasion-resistant cold roller and preparation method thereof | |
| CN104148832B (en) | Forging hook tail frame robot automatic soldering method | |
| CN105499922B (en) | A kind of aluminium alloy thick plate laminated rolling technique | |
| CN106702287B (en) | A kind of method for improving high boron stainless steel hot processing performance and temperature-room type plasticity | |
| CN107119237A (en) | The production method of Q690D medium plates and reduction Q690D medium plate energy consumptions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20170727 |