Brief gabatarwar Q690 waldi sanda ga karfe

2.Brief gabatarwar Q690 karfe farantin karfe

Ƙasashen Duniya Q690 karfe grade	Q690A	Q690B	Q690C	Q690D	Q690E	Q690F
Tsuntsaye	Zafafan birgima		Quenching + zafin jiki (yankin da aka kashe da fushi)
Abubuwan da ke cikin najasa	Babban P/S		low P/S		Mafi ƙarancin P/S
Bukatun girgiza	NO	Matsanancin zafin jiki na al'ada	0 ℃	-20 ℃	-40 ℃	-60 ℃

Koyaya, a halin yanzu, farantin karfe na 690MPa don jiragen ruwa na cikin gida galibi ya dogara ne akan ma'aunin Turai EN10028-6, kuma an jera abubuwan da suka dace a cikin tebur mai zuwa:

Samar da 690MPA karfe don ƙa'idodin matsa lamba na Turai	P690Q	P690QH	Saukewa: P69QL1	Saukewa: P69QL2
Tsuntsaye	lallausan hatsin da aka kashe da karfe
ƙarfi bukatun	Haihuwa≥690MPa(farantin kauri≤50mm) Tensile770-940MPa
Abubuwan da ke cikin najasa	P≤0.025%, S≤0.015%		P≤0.02%, S≤0.010%
Bukatun girgiza	20℃≥60J	20℃≥60J	0≥60J	-20℃≥40J
	0≥40J	0≥40J	-20℃≥40J	-40℃≥27J
	-20℃≥27J	-20℃≥27J	-40℃≥27J	-60℃≥27J
Babban wuraren aikace-aikacen	Tsarin matsi ko tasoshin matsa lamba tare da ƙananan buƙatun taurin tasiri		Spherical tank tare da high fasaha bukatun	Ruwan ruwa mai ruwan iskar gas

A matsayin farantin karfe don tankunan ajiya da ƙarfin matsa lamba, dole ne ya sami ƙarfin ƙarfi da ƙarfi, aikin lankwasa sanyi da ƙarancin ƙima.Ko da yake quenched da tempered Q690 karfe yana da ƙananan carbon daidai kuma m Properties, shi har yanzu yana da wani hardening hali idan aka kwatanta da sauran 50/60kg matsa lamba jirgin ruwa steels, da kuma post-weld zafi magani ake bukata.Duk da haka, babban adadin gwaje-gwajen gwaje-gwaje sun nuna cewa don kayan aikin walda na ƙarfe na Q690, ƙarancin zafin jiki mai tasiri mai ƙarfi zai ragu sosai bayan maganin zafi mai zafi, kuma tare da ƙara yawan zafin jiki na maganin zafi da rage yawan zafin jiki, da lalacewa. na waldi m tauri zai zama mafi bayyane.Sabili da haka, yana da mahimmanci mai mahimmanci don haɓaka ƙarfin ƙarfi, ƙarfin ƙarfi mai ƙarfi, da sandunan walda masu zafi don Q690 karfe don samun nasarar amfani da ƙarfe Q690 zuwa kayan aiki mai ɗaukar nauyi, rage kayan ƙarfe, da rage farashin masana'anta.

3.Brief gabatarwar mu Q690 karfe waldi sanda

Abu	Daidaitawa	Nau'in fata	Polarity	babban fasali
GEL-118M	AWS A5.5 E1108MISO 18275-BE7618-N4M2A	Iron foda low hydrogen irin	DC+/AC	Ƙarfin ƙarfi, ƙarancin hydrogen, ingantaccen haɓakawa, ingantaccen kayan aikin injiniya, ingantaccen tasirin tasirin zafi mai ƙarfi a -50 ° C, da tasirin tasiri mai kyau a -40 ° C bayan jiyya mai zafi.
GEL-758	AWS A5.5 E11018-GISO 18275-BE7618-G A	Iron foda low hydrogen irin	DC+/AC	Ultra-low hydrogen, babban jigon inganci, babban tauri (-60℃≥70J), tasiri mai kyau a -40/-50 ℃ bayan magani mai zafi
GEL-756	AWS A5.5 E11016-GISO 18275-BE7616-G A	Low hydrogen potassium irin	AC/DC+	Ultra-low hydrogen, AC / DC + dual-manufa, babban tasiri tauri (-60 ℃≥70J), tasiri mai kyau a -50/-60 ℃ bayan zafi magani

4.Q690 karfe waldi sanda nuni inji yi nuni

Misali:
1. "X" da aka yiwa alama a cikin jajayen rubutu a cikin Ma'aunin Amurka da Turai yana wakiltar nau'in fata na miyagun ƙwayoyi.
2. GEL-758 yayi daidai da E11018-G da ISO 18275-B E7618-G A a cikin AWS da ka'idodin ISO bi da bi.
3. GEL-756 yayi daidai da E11016-G da ISO 18275-B E7616-G A a cikin AWS da ka'idodin ISO bi da bi.
Mechanical Properties na Q690 karfe waldi sanda a zafi magani jihar

Misali:

1. AWS da ka'idodin ISO ba su da buƙatun aikin aikin zafi don samfuran da ke sama.Ana taƙaita magungunan zafi na sama bisa ga yanayin fasaha na yawancin abokan ciniki kuma don tunani kawai.
2. GEL-118M yana da tasirin tasiri mai kyau a -40 ° C bayan maganin zafi, kuma tasirin tasiri a -50 ° C ya fi bayyane.
3. Bayan maganin zafi, GEL-758 yana da tasirin tasiri mai kyau a -40 ° C, tasiri mai kyau a -50 ° C, da kuma lalacewa a fili a ƙananan zafin jiki a -60 ° C.
4. Ƙarƙashin ƙananan zafin jiki na rashin ƙarfi na GEL-756 bayan maganin zafi yana da ƙananan ƙananan, kuma ƙananan zafin jiki a -60 ° C har yanzu yana da kyau.

Weldability nuni na Q690 karfe waldi sanda

1.Flat fillet waldi (φ4.0mm)

GEL-118M lebur fillet waldi kafin da kuma bayan slag cire (DC+)

Kafin da kuma bayan GEL-758 lebur fillet waldi slag cire (DC+)

GEL-756 lebur fillet waldi kafin da kuma bayan slag cire (AC)

GEL-756 lebur fillet waldi kafin da kuma bayan slag cire (DC+))

Q690 karfe waldi sanda waldi kariya

1. Adana kayan aikin walda:
Ana ba da shawarar abubuwan amfani da walda don adana su a ƙarƙashin yanayin zafi akai-akai da busassun yanayi, kuma a sanya su a kan pallets ko shelves, guje wa hulɗa kai tsaye tare da bango da ƙasa.

2. Shiri kafin walda:
Cire damshi sosai, tsatsa, tabon mai, da sauransu a saman kayan tushe, kuma a guji danshin saman ko fallasa ruwan sama da dusar ƙanƙara.

3. Matakan hana iska:
Lokacin walda, ya kamata a tabbatar da cewa iyakar gudun iska a wurin waldawar bai wuce 2m/s ba.In ba haka ba, ya kamata a dauki matakan kariya.

4. Preheating:
Ana ba da shawarar yin amfani da kayan dumama lantarki don dumama kayan aikin zuwa sama da 150 ° C kafin waldawa.Kafin dasa shuki, ya kamata a sanya shi a zafin jiki na 150 ° C.

5. Layer da kula da zafin jiki na hanya:
A lokacin duk aikin walda, zafin jiki na tsaka-tsakin kada ya zama ƙasa da zafin jiki na preheating, kuma shawarar wucewar zafin jiki shine 150-220 ° C.

6. Cire hydrogen bayan walda:
Bayan an welded din dinkin, nan da nan sai a kara yawan zafin wutar lantarki zuwa 250 ℃ ~ 300 ℃, sai a rika dumama shi tsawon awanni 2 zuwa 4, sannan a yi sanyi a hankali.
① Idan kauri daga cikin workpiece ne ≥50mm, da rike lokaci ya kamata a mika zuwa 4-6 hours, sa'an nan sanyaya sannu a hankali.
② A ƙarƙashin yanayin babban kauri da babban hani, ana iya ƙara ƙarin dehydrogenation bayan waldawa zuwa kauri 1/2, kuma a hankali sanyaya zuwa zafin jiki na tsaka-tsaki.

7. Tsarin bene:
Ana ba da shawarar yin amfani da walda mai yawa-Layer da Multi-pass, kuma saurin walda ya kamata a kiyaye shi a koyaushe.

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