CN1116249A - Large sphere steel constitution and heat treatment method - Google Patents
Large sphere steel constitution and heat treatment method Download PDFInfo
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- CN1116249A CN1116249A CN 95104993 CN95104993A CN1116249A CN 1116249 A CN1116249 A CN 1116249A CN 95104993 CN95104993 CN 95104993 CN 95104993 A CN95104993 A CN 95104993A CN 1116249 A CN1116249 A CN 1116249A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 60
- 239000010959 steel Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title abstract description 8
- 238000010438 heat treatment Methods 0.000 title abstract description 7
- 238000005242 forging Methods 0.000 claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 15
- 238000007669 thermal treatment Methods 0.000 claims description 15
- 238000002791 soaking Methods 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 2
- 239000010949 copper Substances 0.000 description 18
- 229910052802 copper Inorganic materials 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 8
- 239000013078 crystal Substances 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000003466 welding Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000005496 tempering Methods 0.000 description 6
- 230000032683 aging Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 238000003483 aging Methods 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- AHADSRNLHOHMQK-UHFFFAOYSA-N methylidenecopper Chemical compound [Cu].[C] AHADSRNLHOHMQK-UHFFFAOYSA-N 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The composition of said invention is C 0.08-0.18, Si 0.01-0.5, Mn 0.08-1.65, P less than 0.025, S less than 0.015, AlT less than 0.060, Cu 0.50-1.0, Ni0.30-1.0, Nb 0.01-0.05, V 0.08-0.16, N 0.01-0.02, Cr less than 0.30, Mo less than 0.30, Fe, and impurities. The heat treatment process is that normalizing is at 910 minus or plus 15 deg.C then cooling in air after keeping temp. or forced cooling; temper is at 540-600 deg.C then cooling in air after keep temp. High yield strength of ball-shell steel plate and forgings can be made by said invention.
Description
The present invention relates to a kind of manufacturing large-size spherical tank steel, particularly high-yield strength (σ
a〉=460MPa) sphere steel constitution and heat treating method thereof.
In essential equipments such as oxygen spherical tank that industries such as metallurgy, chemical industry, oil are used, spherical ethylene tank, lpg spherical tank, use high-yield strength (σ
a〉=460MPa) steel become the developing direction of making large-size spherical tank, be beneficial to enlarge storage capacity, improve work capacity, reduce wall thickness, reduce deadweight, and in the spherical tank manufacturing processed, need finish by welding by equality strength and other sheet material of toughness level and forging, the spherical tank steel plate of present 460MPa level yield strength and forging need the steel manufacturing by two kinds of grades of steel or two kinds of compositions, this is because the sheet material width is big, section thickness less (about 40mm), individual sheet material speed of cooling is very fast after the normalizing, crystal grain is thin, and the heavy froging cross-sectional width is about 250mm, diameter 1m, volume is bigger, and normalizing postcooling speed is slower, and crystal grain is thick, and in entire cross section inner tissue, the uniformity consistency of mechanical property is poor, therefore heavy froging needs composition is adjusted for adapting to the needs of above-mentioned heat treating regime, increases the element such as the Ni that improve hardening capacity, Cr, Mo, B etc., cause the smelting technology complexity, cost improves.And in the welding process of making large sphere steel, sheet material has caused welding pre-heating temperature different with the composition difference of forging, thereby can influence the quality of welding zone.Therefore the steel plate of large-size spherical tank and forging are to be made by the steel of two kinds of compositions in the prior art, regulation P460 NL 1 steel grade only is applicable to rolled piece (≤150mm is thick) in for example German unified DINEN 10028-3-1992 " the flat rolled piece of the pressurized vessel " standard, regulation can not be suitable for supporting forging equally, also need be supporting by other grade of steel or composition, its composition is: C≤0.20, Si≤0.6, Mn1.00～1.70, P≤0.025, S≤0.015, Al
T〉=0.020, Cn≤0.70, Ni≤0.80, Cr≤0.30, Mo≤0.1, V≤0.20, Ti≤0.03, W≤0.025, and point out that its thermal treatment is normalizing, tempering as required when the normalizing resistance is bad, but concrete technology and mentioning.And the flat 2-11721 of Japanese Patent discloses a kind of " liquefied ammonia of the anticorrosion stress-resistant excellence manufacture method of low-temperature pressure vessel steel material ", be to be: C0.03～0.16, Si0.01～0.55, Mn0.8～1.6 with composition, P＜0.03, S＜0.025, and Cu＜0.5, Ni＜0.5, Cr＜0.5, at least a in Mo＜0.5, all the other are heat-treated after forging for steel of Fe and unavoidable impurities, but concrete thermal treatment process is not seen and is mentioned.Require the hardening capacity height owing to forge material in addition, this composition is applied to sheet material can causes intensity to exceed the upper limit, and toughness descends, the coupling of mechanical property is bad.Therefore also do not find a kind of steel grade of 460MPa yield strength can be used to make spherical shell steel plate and forging simultaneously in the prior art.
One of purpose of the present invention is to obtain a kind of large sphere steel constitution, can be applied to make spherical shell steel plate and forging simultaneously.
Another object of the present invention is to obtain a kind of thermal treatment process of above-mentioned steel grade to guarantee to obtain required tissue and mechanical property.For achieving the above object, the present invention is achieved in that
A kind of large sphere steel, its composition (wt%) is: C0.08～0.18, Si0.01～0.5, Mn0.08～1.65, P≤0.025, S≤0.015, Al
T≤ 0.060, Cu0.50～1.0, Ni0.30～1.00, Nb0.01～0.05, V0.08～0.16, N0.01～0.02, all the other are Fe and unavoidable impurities.
The optimum value of this sphere steel constitution is: C0.08～0.15, Si0.01～0.5, Mn1.00～1.65, P≤0.020, S≤0.015, Al
T0.010～0.030, Cu0.50～0.70, Ni0.30～0.80, V0.08～0.15, Nb0.01～0.05, N0.01～0.02, all the other are Fe and unavoidable impurities.This alloy also contains: Cr≤0.30, Mo≤0.30.
A kind of thermal treatment process of large sphere steel, when goods are sheet material, at first carry out normalizing treatment: promptly be heated to 910 ± 15 ℃, air cooling after insulation for some time, tempered then processing: air cooling after 540～600 ℃ of insulation for some time, above-mentioned soaking time is every millimeter thickness of slab 1.5～2.0 minutes.When goods were forging, its normalizing treatment was forced cooling for the back of coming out of the stove.
Below the present invention is described in detail.
The present invention is by design, improvement to spherical tank Steel Alloy composition, can realize making the Wide and Thick Slab and the forging of 460MPa level yield strength with same composition, cooperate thermal treatment process that forging can be delivered goods by normalizing+Annealed Strip simultaneously, and needn't adopt modifier treatment complicated in the prior art.
The present invention mainly finishes by the adjustment of elements such as Cu, Ni, Cr, Mo, V, N the improvement of alloy ingredient, makes this composition not be only applicable to steel plate, also is applicable to the forging in thick cross section, introduces the effect of each alloying element below respectively:
Alloy strength can be improved in C:0.08～0.18, and＜0.08 intensity is lower, and＞0.18 influences weldability.
Si:0.01～0.5, the solution strengthening element carries out deoxidation during smelting, and＜0.01 reduces intensity, and＞0.5 influences toughness.
Mn:0.08～1.65, the solution strengthening element can improve the intensity of steel, and＜0.08 intensity is bad, and＞1.65 influence toughness.
Segregation is caused in P≤0.025, therefore a set upper limit.
S≤0.015, too high formation inclusion.
Al≤0.060, reductor,＞0.06 forms too much inclusion, influences performance.
Cu:0.50～1.0 when Cu plays the solution strengthening effect during content＜0.30 in steel, surpass at 0.30 o'clock, can separate out ε-Cu spheroidal particle, play dispersion-strengthened action, can improve yield strength, are the bioelement that improves resistance to atmospheric corrosion.
Hardening capacity is improved in Ni:0.30～1.0, and crystal grain thinning improves intensity, toughness, and＜0.30 effect is not obvious, and＞1.00 costs increase too high.
Cr≤0.30, hardening capacity can be improved in Mo≤0.30, when＞0.30, causes the steel embrittlement, cold cracking during welding.
Nb:0.01～0.05, V:0.08～0.16, Nb, V are micro alloying element, can form Nb (C, N), V (C, N) dispersed granules, improve yield strength, the improvement of too high then effect is not obvious, but it is too high that cost increases, and influences the heat affected zone toughness of steel welding simultaneously.
N:0.01～0.02 participates in forming dispersed granules, the too high strain aging performance that then influences steel as alloying element.
From above composition as can be seen, steel grade of the present invention is a Copper Bearing Steel, be copper-age hardening steel, the purpose that adds copper, be can in ageing treatment afterwards, make in the steel disperse separate out ε-Cu round particle precipitated phase (≤100nm), to improve the yield strength of steel, can reduce carbon content in the steel like this, improve the weldability of steel.The past people think copper too high levels (＞0.5%) in the steel always, can cause copper to split, in fact this causes owing to existing harmful element such as As and copper chemical combination in the steel, and the present invention is because molten steel itself is pure, can reach at 0.5～1.0 o'clock copper does not take place at copper content to split phenomenon.Simultaneously, handle through micro alloying element Nb, V, the Nb that separates out in the steel (C, N), V (C, N) particle be the refinement ferrite crystal grain both, and yield strength is increased substantially again, thereby guarantees to obtain the above yield strength (upper yield point) of 460MP.In addition, add the solution strengthening effect that suitable Ni, Cr, Mo have improved steel, increased the hardening capacity of steel.
With the alloy of above-mentioned Chemical Composition through batching, smelting, cast, rolling or forge after, obtain air cooling behind required sheet material or the forging, its thermal treatment process is respectively:
Sheet material thermal treatment:
Because the plate surface crystal grain after rolling is thin, middle crystal grain is thick, and thickness cross section performance is inhomogeneous, need carry out following thermal treatment:
Normalizing treatment: be heated to 910 ± 15 ℃ and carry out austenitizing, soaking time is every millimeter thickness of slab 1.5～2.0 minutes, air cooling then, in this temperature range and soaking time, still exist owing to AlN, Nb (C, N) particle, it is tiny that austenite crystal still keeps, and can obtain tiny ferrite+bainite crystal grain behind the air cooling.
Temper: be heated to 540～600 ℃, soaking time is every millimeter thickness of slab 1.5～2.0 minutes, carries out ageing treatment, can make that ε-the Cu particle is separated out, but soaking time is long, causes the overaging meeting to make ε-Cu particle growth excessive.
Forging thermal treatment: basic identical with sheet material, just because the thickness of forging own is big, need after normalizing treatment is come out of the stove, to adopt air-cooled atomized water spray to force cooling, to improve the speed of cooling of forging.
Introduce embodiments of the invention below in conjunction with effect.
1, steel-making
Method for making steel is by the producer oneself decision, but be killed steel, should contain enough nitrogen killers in the steel, present embodiment employing converter steelmaking, and Chemical Composition such as table 1 show.
2, casting:
Die casting, Ar gas shiled, can cast sheet material ingot casting and forging ingot casting.
3, breaking down:
1250～1280 ℃ of steel ingot Heating temperatures, the breaking down cogging, the thick 250～300mm of base, width≤1600mm rolls the back air cooling, and fire cuts piecemeal, can be used as slab, also can be used as forging stock.
4, steel plate rolling:
1220～1250 ℃ of slab heating temperatures.Roughing start rolling temperature 〉=1150 ℃, laterally ratio 〉=50% is depressed in roughing, and temperature is treated to 950～920 ℃ of beginning finish rolling in finishing temperature 〉=1000 ℃ after rolling, and finish rolling is axial rolling, depresses ratio 〉=40%, and the back air cooling is rolled in finishing temperature 〉=850 ℃.
5, sheet material thermal treatment:
910 ± 15 ℃ * soaking time of normalizing treatment, the back air cooling of coming out of the stove.
540～600 ℃ * soaking time of temper, the back air cooling of coming out of the stove.
Soaking time is every millimeter thickness of slab 1.5～2.0 minutes, carries out in normalizing furnace.
6, forge: on fast forging equipment, finish forging.
1220～1250 ℃ of forging stock Heating temperatures.Open forging temperature 〉=1150 ℃, be swaged into cake in advance, the principal section height to the ratio of finished parts height greater than 1.6 times.Melt down heating (≤1100 ℃), secondary forges a fire and finishes, and the back air cooling is forged in final forging temperature≤850 ℃.
7, forging thermal treatment
910 ± 15 ℃ * soaking time of normalizing treatment, the air-cooled or water smoke cooling in the back of coming out of the stove.
540～600 ℃ * soaking time of temper, air cooling.
Soaking time is every millimeter thickness of slab 1.5～2.0 minutes.
The scope of application of said products is: steel plate thickness≤50mm, forging diameter≤1200mm, thickness≤250mm.
Sheet material and its performance of forging through above-mentioned implementation method manufacturing are:
Steel plate: σ
aBe 485～530MPa, σ
bBe 595～630MPa, σ
5Be 26～33% ,-10 ℃ of A
KvVertically being 212～236J, laterally is 100～142J ,-60 ℃ of A
KvVertical 129～170J laterally is 51～64J, and 180 ℃ of wide clod washes are intact.Xia Shi v-notch sample NDT temperature is lower than 100 ℃.Drop weight test P1 sample NDT temperature is lower than-65 ℃, laterally is lower than-60 ℃.Steel plate is insensitive to strain aging, and stress-removal is handled the back stable performance, and alternation state and stress-removal treated state fracture toughness property are good, and da/dN is good for the antifatigue crack growth rate.
Forging: be strict in forging standard JB4726-94, under the JB4727-94 sampling standard, σ
aBe 480～490MPa, σ
bBe 590～600MPa, σ
5Be 27～37% ,-10 ℃ of A
KvBe 176～199J ,-40 ℃ of A
KvBe 111～146J.After UT (Ultrasonic Testing), forging reaches ID level (superlative degree) level.
Compared with prior art, the present invention adjusts on alloy ingredient, improve, show as table 1, and cooperate corresponding thermal treatment process, the present invention and Comparative Examples technology characteristics have been listed in the table 2, the contrast of mechanical property, like this, can make carbon content reduction in the steel, realization improves weldability with the copper carbon drop, and the ε-Cu dispersed granules of separating out through ageing treatment can make the yield strength of steel improve simultaneously, available same stove molten steel produces the spherical shell steel plate and the forging of equal performance requriements, and need not to adopt two steel grades, both simplified smelting technology, reduce cost, can guarantee spherical tank welding zone quality again.
Table 1
| Chemical Composition (weight %) | ||||||||||||||
| Grade of steel | C | ?Si | ?Mn | ?P | ?S | ?AlT | ?Cu | ?Ni | ?Cr | ??Mo | ?Nb | ??V | ???N | |
| The present invention | ?????1 | 0.14 | 0.28 | ?1.44 | 0.007 | 0.005 | 0.039 | ?0.57 | ?0.61 | ?— | ?— | 0.020 | 0.120 | 0.0100 |
| ?????2 | 0.11 | 0.31 | ?1.38 | 0.019 | 0.004 | 0.022 | ?0.62 | ?0.60 | ?0.17 | ?0.06 | 0.029 | 0.12 | 0.0132 | |
| ?????3 | 0.11 | 0.34 | ?1.52 | 0.016 | 0.005 | 0.023 | ?0.57 | ?0.59 | ?0.10 | ?0.05 | 0.021??? | 0.09 | 0.0140 | |
| ?????4 | 0.12 | 0.28 | ?1.42 | 0.009 | 0.005 | 0.030 | ?0.48 | ?0.48 | ?0.016 | ?0.06 | 0.019 | 0.011 | 0.0100 | |
| Comparative Examples | ????CF62 | 0.09 | 0.30 | ?1.35 | 0.009 | 0.006 | ?0.08 | ?1.06 | ?0.30 | ?0.27 | — | 0.05 | ??????? | |
| Japanese Patent * | 0.12 | 0.28 | ?1.21 | 0.023 | 0.003 | 0.038 | ?0.20 | ?0.12 | ?0.15 | ?— | 0.030?? | 0.060 | ||
| ??20MnMoNb | 0.20 | 0.30 | ?1.50 | 0.020 | 0.010 | 0.030 | ??— | ?— | ?0.20 | ?0.55 | 0.030 | — | 0.0070 | |
Table 2
| Grade of steel | Thermal processing method | Thickness mm | Thermal treatment process | σ a??σ b??A kv???J MPa????MPa???-40℃??0℃ | |
| The present invention | ????1 | Forge | 40 | Normalizing+tempering | ≥500?≥600??≥47??≥47 |
| ????2 | Forge | 220 | Normalizing+tempering (air-cooled after the normalizing) | ≥460?≥580??≥47??≥47 | |
| ????2 | Rolling | 46 | Normalizing+tempering | ≥460?≥580??≥47??≥47 | |
| ????3 | Forge | 40 | Normalizing+tempering | ≥500?≥600??≥47??≥47 | |
| ????4 | Forge | 40 | Normalizing+tempering | ≥460?≥590??≥47??≥47 | |
| Comparative Examples | ???CF62 | Forge | ≤300 | Modified (shrend) | ≥490?≥610??≥47??≥47 |
| Japanese Patent * | Forge | Copper or acceleration is cooled off | ?—65kg/mm 2??—????— | ||
| ?20MnMoNb | Forge | ≤300 | Modified (shrend) | ≥470?≥620???—???≥41 |
* Japanese patent laid-open 2-11721
Claims (5)
1, a kind of large sphere steel is characterized in that: Chemical Composition (wt%) is: C0.08～0.18, Si0.01～0.5, Mn0.05～1.65, P≤0.025, S≤0.015, Al
T≤ 0.060, Cu0.50～1.0, Ni0.30～1.00, Nb0.01～0.05, V0.08～0.16, N0.01～0.02, all the other are Fe and unavoidable impurities.
2, spherical tank steel according to claim 1, it is characterized in that: the optimum value of described Chemical Composition is: C0.08～0.15, Si0.01～0.5, Mn1.00～1.65, P≤0.020, S≤0.01 5, Al
T0.010～0.030, Cu0.50～0.70, Ni0.30～0.80, V0.08～0.15, Nb0.01～0.05, N0.01～0.02, all the other are Fe and unavoidable impurities.
3, according to claim 1,2 described spherical tank steel, it is characterized in that: this alloy also contains Cr≤0.30, Mo≤0.30.
4, a kind of thermal treatment process of large sphere steel, it is characterized in that: when goods are sheet material, at first carry out normalizing treatment: promptly be heated to 910 ± 15 ℃, air cooling after insulation for some time, tempered then processing: air cooling after 540～600 ℃ of insulation for some time, above-mentioned soaking time is every millimeter thickness of slab 1.5～2.0 minutes.
5, thermal treatment process according to claim 4 is characterized in that: when described goods were forging, its normalizing treatment was forced cooling for the back of coming out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95104993A CN1040777C (en) | 1995-05-19 | 1995-05-19 | Large sphere steel constitution and heat treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95104993A CN1040777C (en) | 1995-05-19 | 1995-05-19 | Large sphere steel constitution and heat treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1116249A true CN1116249A (en) | 1996-02-07 |
| CN1040777C CN1040777C (en) | 1998-11-18 |
Family
ID=5075370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95104993A Expired - Lifetime CN1040777C (en) | 1995-05-19 | 1995-05-19 | Large sphere steel constitution and heat treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1040777C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430507C (en) * | 2005-08-31 | 2008-11-05 | 宝山钢铁股份有限公司 | 700MPa grade high ductility low-yield ratio thick steel plate and manufacture method thereof |
| CN101914665A (en) * | 2010-08-30 | 2010-12-15 | 南京钢铁股份有限公司 | Process for producing thick plate of plastic die steel |
| CN103060685A (en) * | 2013-01-08 | 2013-04-24 | 舞阳钢铁有限责任公司 | 17MnNiVNbDR steel plate for tank car, and its production method |
| CN103540840A (en) * | 2013-09-30 | 2014-01-29 | 湖南华菱湘潭钢铁有限公司 | Production method of Cr-free high-strength quenched and tempered steel plate for spherical tank |
| CN103695804A (en) * | 2012-09-28 | 2014-04-02 | 上海梅山钢铁股份有限公司 | Steel used for petroleum vessel support and production method of the steel |
| TWI620824B (en) * | 2016-02-29 | 2018-04-11 | Jfe Steel Corp | Steel plate for cans and manufacturing method thereof |
| CN109355570A (en) * | 2018-11-30 | 2019-02-19 | 湖南华菱湘潭钢铁有限公司 | Thin gauge easily welds the production method of low temperature structure steel plate |
| CN114737130A (en) * | 2022-04-29 | 2022-07-12 | 鞍钢股份有限公司 | A kind of 355MPa grade low temperature steel and manufacturing method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5597425A (en) * | 1979-01-19 | 1980-07-24 | Nippon Kokan Kk <Nkk> | Preparation of high-tensile steel with low yield ratio, low carbon and low alloy |
| JPS56130456A (en) * | 1980-03-14 | 1981-10-13 | Kobe Steel Ltd | Hot rolled steel plate for flash butt welding and cold working |
-
1995
- 1995-05-19 CN CN95104993A patent/CN1040777C/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430507C (en) * | 2005-08-31 | 2008-11-05 | 宝山钢铁股份有限公司 | 700MPa grade high ductility low-yield ratio thick steel plate and manufacture method thereof |
| CN101914665A (en) * | 2010-08-30 | 2010-12-15 | 南京钢铁股份有限公司 | Process for producing thick plate of plastic die steel |
| CN103695804A (en) * | 2012-09-28 | 2014-04-02 | 上海梅山钢铁股份有限公司 | Steel used for petroleum vessel support and production method of the steel |
| CN103060685A (en) * | 2013-01-08 | 2013-04-24 | 舞阳钢铁有限责任公司 | 17MnNiVNbDR steel plate for tank car, and its production method |
| CN103540840A (en) * | 2013-09-30 | 2014-01-29 | 湖南华菱湘潭钢铁有限公司 | Production method of Cr-free high-strength quenched and tempered steel plate for spherical tank |
| TWI620824B (en) * | 2016-02-29 | 2018-04-11 | Jfe Steel Corp | Steel plate for cans and manufacturing method thereof |
| US10941456B2 (en) | 2016-02-29 | 2021-03-09 | Jfe Steel Corporation | Steel sheet for can and method for manufacturing the same |
| CN109355570A (en) * | 2018-11-30 | 2019-02-19 | 湖南华菱湘潭钢铁有限公司 | Thin gauge easily welds the production method of low temperature structure steel plate |
| CN114737130A (en) * | 2022-04-29 | 2022-07-12 | 鞍钢股份有限公司 | A kind of 355MPa grade low temperature steel and manufacturing method |
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| CN1040777C (en) | 1998-11-18 |
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Owner name: BAOSHAN IRON & STEEL CO., LTD. Free format text: FORMER NAME OR ADDRESS: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD Owner name: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD Free format text: FORMER NAME OR ADDRESS: BAOSHAN STEEL GROUP IRON AND STEEL CO LTD |
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Address after: 201900, Fujin Road, Shanghai, Baoshan District orchard Patentee after: BAOSHAN IRON & STEEL Co.,Ltd. Address before: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Patentee before: BAOSHAN IRON & STEEL CO.,LTD. Address after: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Patentee after: BAOSHAN IRON & STEEL CO.,LTD. Address before: 201900 No. 1, Middle Road, Baoshan District, Shanghai Patentee before: Baosteel Group Corporation |
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