Project of oil storage tank studies with high strenth steel and apply progress

Normal > summary: The article is setting with construction of storage tank of our country large oil, explained storage tank of our country oil uses spread cables energy to solder steel origin, sort and characteristic, analysed design of this steel alloy and the value that produce craft to cooperate, and smelt, rolling and heat treatment craft are affected to function, pointed out the reason of HAZ tenacity deterioration and the step that should take. The energy of 610MPa spread cables that proposal our country is badly in need of at present in development solders steel and its form a complete set solder material while, develop the rolled steel that 200 thousand M3 or place of larger volume storage tank need and solder material, make storage tank of our country oil uses steel research, development and applied level to have apparent progress. Normal > keyword: Energy of spread cables of oil storage tank solders with steel material preface Normal > to make sure our country the sources of energy is safe, the country begins to establish reserve of national oil strategy first half of the year from 2003, plan the long-dated goal that achieved oil reserve 90 days 2015. The premise condition that achieves this goal is the 150 thousand M3 of 10 ～ that construction uses at oil storage (or volume is larger) storage tank of large crude oil. Use steel amount to reduce storage tank, a few wainscot all use high strenth armor plate to make below general storage tank, wainscot of motherboard, roof, upside can use other intensity level to fasten inferior rolled steel to make. Among them the our country of high strenth armor plate that wainscot place uses still cannot mass production. Before 2004 place of company of our country petrifaction builds storage tank of oil of 100 thousand M3, basically use what enterprise of Japanese main iron and steel produces to succumb intensity 490MPa above, the spread cables energy that tensile strength is more than 610MPa solders armor plate of air qualitative high strength, plate thickness is commonly between 12 ～ 40mm [[I]] . Be in in after this our country large-scale during building oil storage tank, high strenth armor plate offers the money amount, cycle that offer money, price to wait become the problem that creates oilcan to must pay close attention to. At present to solve oil storage tank offers the condition with goods ground and onefold channel with high strenth armor plate, national hair changes appoint the steely enterprise that asks home has actual strength conditionally is developed as soon as possible agree with large oilcan project uses steel. For this, place of courtyard of petrifaction, metallurgy, scientific research is various together, established oil to lay in base construction to lead group and form a complete set to solder with armor plate material attacks correlation to join a working group [[Ii]] . Normal > plants to promote this kind of domestic steel, the article used the development of steel and application to undertake summing up to storage tank of domestic and international oil, with drawing lessons from foreign experience better, make domestic new research and development congener rolled steel company takes roundabout way less, reach the level of foreign congener product as soon as possible. 1 oil storage tank uses steel and its characteristic Normal > oil storage tank belongs to combustible danger to taste. Accordingly, after the attestation of branch of authority qualitative check that builds storage tank place to need rolled steel and solder material to need to be appointed through the country, just can use. Current, our country is large-scale built storage tank volume 100 thousand M3, the spread cables energy that wainscot basically uses 610MPa solders high strenth armor plate. End in June 2004, via Hefei general and mechanical institute experiments, what countrywide boiler pressure vessel standardizes technical committee to evaluate attestation is OK use at storage tank of our country oil to build high strenth steel to plant reach manufacturing unit to see watch 1. From the watch 1 in can see, steel plants the high strength that with Yu Shi oily storage tank builds to basically come from Japan 3 large and steely enterprises: Iron of JFE, new day is mixed friendly metal. Current, JFE and the spread cables energy that new day iron produces solder steel is representing world banner level. Normal > our country already used enterprise of Japanese different iron and steel to produce built 10 ~15 storage tank of oil of different cubage of 10 thousand M3, make domestic oilcan design and construction company correspondence are planted with Japanese steel function, treatment, solder etc accumulated richer experience. The energy of WH610D2 spread cables that company of group of domestic Wuhan iron and steel produces solders high strenth armor plate, undertook more thorough theory studies [[Iii]] , [[Iv]] , built storage tank of 4 100 thousand M3 in petrifaction of Beijing swallow hill only, experience of accumulated design, construction, application is less. Although company of dance in relief iron and steel produced WY610D stencil steel, but without applied outstanding achievement [[V]] . Normal > is current, our country is large-scale the storage tank of 10 thousand M3 of built 10~15, basically choose succumb intensity 490MPa, the spread cables energy of tensile strength 610MPa solders high strenth shift is simple board. The storage tank volume that 610MPa class can make most greatly 17.

50 thousand M3. Be in not far in the future, our country will be built 20 or storage tank of oil of 300 thousand M3, 610MPa steel already cannot satisfy a requirement, need intensity level is higher the spread cables energy of 690MPa or 780MPa solders high strenth shift is simple board. Japan has developed a success this kind of steel, have applied example, at present our country still did not begin the development that this kind of steel plants, need as soon as possible to begin to develop. Normal > to reduce cost of material, oilcan basically uses high strenth attune to pledge with steel capacity board. If use,succumb the spread cables energy of intensity 490MPa solders steel is replaced succumb the 16MnR of intensity 350MPa manufactures storage tank, the wall is large can decrease thin 25%~30% . To reduce production cost, basically solder through rising efficiency, when soldering like negative, iron pink or broken welding wire are added in welding line, technology of the gas electricity vertical position welding of spread cables energy and horizontal position welding of the solder that bury arc basically is used in wainscot construction. Accordingly, oil storage tank should satisfy with high strenth steel: (1) index of contented and mechanical function asks (tall succumb and tensile strength, tall tenacity, tall uniformity and stability) , use tone qualitative steel commonly. (2) must get used to spread cables energy to solder, use a list the steel that attestation of branch of authority of 1 classics state can use at oil storage tank to build plants, manufacturing company and time [[Vi]] Normal Align=center> steel plants name or brand Normal Align=center> produces enterprise Normal Align=center> attestation lives Normal Align=center>2004. Normal Align=center>2004. 2 WT-610EQ new Japan makes iron company limited Normal Align=center>2003. Low temperature of 10 NT-490EQ N-TUF490 WEL-TEN610SCF WEL-TEN610CF NK-HITEN610U2L uses Normal Align=center>2002. Low temperature of River Ace 610L of armor plate of qualitative high strength of 12 NK-HITEN610U2 air pledges with tone 12MnNiVR of high strenth armor plate moves qualitative high strenth board dance this world is steely and finite liability company Normal Align=center>2002. 7 SUMITEN610F Japan lives Normal Align=center>2002. Energy of 6 spread cables solders with iron and steel of Wuhan of WH610D2 armor plate (group) company Normal Align=center>2001. Normal Align=center>1998. After the spread cables energy of 10 10KJ/mm solders, tenacity of its HAZ model is not reduced apparently, the mechanical function of contact achieves as identical as mother capable person requirement. Accordingly, oil storage tank calls spread cables energy to solder again with steel steel. (3) solder to suit the spot, warm-up does not need before soldering, do not arise after solder solder cold crack. This kind of steel calls steel of coefficient of low crackle sensitivity again. From this knowable, oil storage tank uses steel main characteristic is satisfying mechanical function to ask premise falls namely, have get used to spread cables energy to solder with the character with low sensitive crackle. Oil storage tank uses CF steel unlike production sphere with steel. Oil storage tank must get used to spread cables energy to solder with steel requirement, and heat treatment of the whole after storage tank does not need to undertake solder normally (the heat treatment after undertaking local solder only sometimes) ; Although CF steel has low crackle sensitivity, but cannot suit spread cables energy to solder normally. When be being used at making sphere, need satisfies the requirement of heat treatment of the whole after solder, do not have tendency of SR reheat crackle namely. 2 oil storage tank is designed with the composition of steel and produce craft characteristic 2.

1 alloy composition designs characteristic Normal > asks to satisfy mechanical function, assure the uniformity of organization, function and stability, normally oil storage tank pledges for tone with high strenth steel condition delivers the goods. Introduce different alloying element commonly, use solid dissolve, photograph to change to differ equally with a few separate out aggrandizement mechanism satisfies high strenth requirement. Basically use reasonable composition design, organization to refine technology, Jiang Ren to match wait for contented tall tenacity to ask. Those who use tone to pledge heat treatment achieves organization and performance is even change. Basically be to pass reasonable composition to design, especially carbolic equivalent control, microelement is added, smelt composition control and constituent control achieve weldability requirement, energy of implementation spread cables solders and low solder crackle sensitivity. Nitride of the aluminium that energy of contented spread cables solders to basically use smelt and high temperature to form, titanium, vanadium, niobium, prevent solder to the grain of hot influence area is brought up and prevent M-A group yuan form. Low crackle sensitivity basically uses control carbolic equivalent and reduce crackle coefficient of sensitivity. Normal > put together, the element that the design of system of alloy of oil storage tank needs to consider has: Reduce contented and cost, mechanical performance requirement, get used to smelt, rolling and heat treatment craft, weldability to wait. The shift that expresses the 2 610MPa intensity level that produce for Japanese JFE to fasten is simple board chemical composition. Suiting the steel that makes oil storage tank is energy of JFE-HITEN610E spread cables solders steel. Its move the point of qualitative steel unlike common JFE-HITEN610 high strenth, depended on reducing carbolic content apparently (by 0.

16% reduce 0.

009% ) with crackle coefficient of sensitivity (by 0.

26 fall 0.

20 the following) ; As good as weldability but photograph of steel JFE-HITEN610U1, U2, U2L compares microtherm use high strenth, advocate alloying element does not have apparent difference, but the microelement in objective has difference, reflect in product standard do not go out normally, the technology that belongs to an enterprise is secret. 2.

Energy of 2 spread cables solders the manufacturing technology Normal > clean steel, TMCP has been in large and steely enterprise to apply generally, a lot of enterprises equiped big tonnage of board base Lian Zhu, wide cut is thick board rolling mill, wait from line and equipment of online heat treatment, can use rolling and different smelt craft, heat treatment craft to express 2 Japan JFE610MPa to move qualitative high strenth board chemical composition [[Vii]]JFE-HITEN board thick (Mm) C Si Mn P S Cu Ni Cr Mo V Ceq Pcm 610E* 6~75 Normal > ≤ 0.

09 0.

15 ~0.

55 1.

00 ~1.

60 ≤ 0.

020 ≤ 0.

010 ≤ 0.

30 ≤ 1.

00 ≤ 0.

30 ≤ 0.

30 ≤ 0.

08- - ≤ 0.

≤ of 50 of ≤ of 20 610** T 0.

16 0.

15 ~0.

55 ≤ 1.

50 ≤ 0.

025 ≤ 0.

015 ≤ 0.

30 ≤ 1.

00 ≤ 0.

30 ≤ 0.

30 ≤ 0.

08 ≤ 0.

45 ≤ 0.

≤ of 75 of ≤ of T of 26 50 ≤ 0.

47 ≤ 0.

≤ of 75 of 28 T ≥ 0.

49 ≤ 0.

≤ of 28 610L*** 6~50 0.

16 ≤ 0.

55 ≤ 1.

50 ≤ 0.

025 ≤ 0.

015Add ≤ Ni, Cr, Mo, V according to need 0.

≤ of 610U1**** 6~100 of 45 　 0.

09 0.

15 ~0.

55 1.

20 ~1.

60 ≤ 0.

025 ≤ 0.

010 ≤ 0.

30 ≤ 1.

00 ≤ 0.

30 ≤ 0.

30 ≤ 0.

08- - ≤ 0.

≤ of 20 610U2**** 6~75 0.

09 0.

15 ~0.

55 1.

00 ~1.

60 ≤ 0.

025 ≤ 0.

010 ≤ 0.

30 ≤ 1.

00 ≤ 0.

30 ≤ 0.

30 ≤ 0.

08- - ≤ 0.

≤ of 20 610U2L**** 6~75 0.

09 0.

15 ~0.

55 1.

00 ~1.

60 ≤ 0.

025 ≤ 0.

010 ≤ 0.

30 ≤ 1.

00 ≤ 0.

30 ≤ 0.

30 ≤ 0.

08- - ≤ 0.

20 * JFE-HITEN610E solders for spread cables energy high strenth moves qualitative steel; **JFE-HITEN610 moves qualitative steel for high strenth; ***JFE-HITEN610L moves qualitative steel with high strenth for microtherm; ****JFE-HITEN610U1 moves qualitative steel for the high strength with good weldability; The put together resultant force that sets requirement of place of steel of energy of implementation spread cables learns function. Different smelt, cast, the difference of means of rolling, heat treatment, formed different company to manufacture the manufacturing technology with 610MPa respective steel. Smelt basically has converter, electric stove two kinds, but 2 chastening because difference of configuration of company production condition is apparent. The kind that billet produces basically has modular casting and Lian Zhu. Rolling means has: Traditional rolling, TMCP craft. Quench means has: Online quench, quench from the line; Temper means has: Online temper and temper leaving a line. The different combination of craft of smelt, chastening, rolling, heat treatment, make the manufacturing process with different peculiar company. Accordingly, although be the same as the steel of composition, the product performance that by different technology production gives also is put in notable difference. TMCP rolling refines an organization specificly is Jiang Ren changes the basis that match. Inchoate, level of 610MPa high strenth, accordingly, develop the key of steel of energy of 610MPa spread cables, besides composition design, combination of smelt, chastening, rolling, heat treatment is deciding steel more finally integral performance. Accordingly, the composition design that this steel plants must fit the craft requirement such as the smelt of the oneself of the enterprise and rolling. Normal > clean is purified is to realize steel of energy of 610MPa class spread cables the premise of Gao Ren sex and assure. Technology of clean steel production basically is outside passing molten iron smelt and 2 furnace chastening, reduce content of the sulfur in steel, phosphor, nitrogen, oxygen, hydrogen. Current, the spread cables energy that Japanese JFE produces solders content of S of requirement of steel industry standard, P is 610MPa class high strenth S ≤ 0.

010% , p ≤ 0.

020% , but content of the S in content, P is actually far ask under this standard, inferior sulfur phosphor content also is to reduce the amount of slag inclusion content in steel to offer premise. From document [the oil storage tank that 1] place detects uses steel part, sulfur phosphor content all very low. Accordingly, whether energy of manufacturing spread cables solders steel, the smelt level of the enterprise is the key restricts one of elements. Our country GB19189-2003 " pressure vessel uses board of air qualitative high strength " in, 12MnNiVR medium sulfur phosphor content asks to be: S ≤ 0.

010% , p ≤ 0.

025% , among them phosphorous content requirement is wide at standard of Japanese JFE industry. GB19189 standard is in our country carry out, can pass the technical barrier that national level creates, prevent this kind of steel to be produced in the company that does not have smelt requirement. The in kind that smelt enterprise produces achieves content of lower than GB sulfur, phosphor only, just achieve requirement function goal likely. Normal > spread cables solders the manufacturing technology of steel, deciding percent of pass of stability of its composition design, function, production lot, finished product to wait. Current, our country steely enterprise and energy of spread cables of production of Japanese steely company solder main difference depends on steel, of molten iron clean degree, design of composition of heat treatment means and parameter precision control, steel and manufacturing condition are optimal cooperate, production lot and function stability. Japanese JFE progresses according to the technology of its steel rolling and heat treatment product line, the composition that adjusts this steel in time (if reduce carbolic content and alloying element dosage) , with advanced TMCP or DQT technology (if use SUPER-OLAC -- Online Accelerated Cooling, online quench and temper) the impact that offsets alloying element to drop, big batch production gives performance the product with identical, lower cost, make its product has competition ability more [[Viii]] . Energy of 3 spread cables solders Normal > is opposite domestic and internationally the main reason of deterioration of tenacity of HAZ of steel of spread cables energy already undertook a large number of research and summary [[Ix]] , [[X]] . Main reason has: Grain is thick change, the crystal boundary ferrite that forms low tenacity, on organization of body of shellfish family name; In multilayer multi-pass welding receives HAZ in local form M-A group yuan etc. Accordingly, in steel clean premise falls, prevent HAZ grain to be brought up the M-A group with low tenacity yuan appearing is the key that energy of implementation spread cables solders. Current, spread cables energy solders steel basically uses microalloy to change design principle, join alloy or the oxide such as titanium, vanadium, niobium, boron, nitride to wait, the individual or compound particle such as the TiN with limitative HAZ grown grain, NbN, Ti2O3, BN, AlN is formed in the organization, those who restrict HAZ grain is grown. When spread cables energy solders, the HAZ tenacity that contains microalloy steel of Nb, V drops apparent. The nitrogen that basically uses control Ti, Al at present or oxide amount will come true. Normal > grain to concern certainly. Begin mother capable person to organize granuality of phyletic, brilliant and HAZ grain grown rule research, also conduce to spread cables energy soldering steel development. 4 conclusion Normal > (1) at present, the energy of 610MPa class spread cables that construction of storage tank of our country oil uses in great quantities solders tone pledges high strenth steel basically counts foreign import, what our country should develop this steel energetically is homebred change research, promote low cost to realize our country the sources of energy to lay in strategic goal quickly. Build volume in the future before long to satisfy our country the demand of older oil storage tank, should develop as early as possible more the spread cables energy of high strenth level solders high strenth moves qualitative steel. Normal > (2) energy of 610MPa spread cables solders high strenth shift is simple board closely related integral performance and composition and manufacturing technology. When developing this kind of steel, the manufacturing condition such as the oneself rolling that composition design should join a company, cooling, heat treatment considers integratedly, cannot be modelled on blindly the composition of foreign congener steel. (3) prevent spread cables energy to solder the academic basis of deterioration of steel HAZ tenacity still is grain of limitation of the existence in steel is grown inside unripe or ab extra particle, and be refined through what craft of reasonable rolling, heat treatment gets and organization of not easy grown matrix. CNC Milling