P91 steel yeeb nkab vuam txheej txheem

Weldability tsom xam

• tshuaj muaj pes tsawg leeg ntawm steel

Cov tshuaj muaj pes tsawg leeg ntawm A335-P91 steel yog raws li nram no:

C	Mn	P Tsawg dua lossis sib npaug	S Tsawg dua los yog sib npaug	Si	Cr
0.08-0.12	0.30-0.60	0.020	0.010	0.20-0.50	8.0-9.50
Mo	V	N	Ni tsawg dua los yog sib npaug	Al Tsawg dua lossis sib npaug	Nb
0.85-1.05	0.18-0.25	0.03-0.07	0.40	0.04	0.06-0.10

Raws li tuaj yeem pom los ntawm cov lus saum toj no, cov hlau no yog ib qho nruab nrab alloy kub-resistant steel.

• Vuam yam ntxwv ntawm P91 steel

① Txij li thaum P91 yog ib qho nruab nrab hlau alloy, nws muaj qhov nyiam ntawm qhov txias txias. Vuam tawg tuaj yeem ncav cuag 100% yam tsis muaj preheating. Txias tawg tuaj yeem zam tau thaum preheating ntawm 200 ~ 250 degree.

② nruj me ntsis tswj lub interlayer kub ntawm lub weldment thaum lub sij hawm vuam txheej txheem kom nws nyob rau hauv lub preheating kub los yog siab dua yog lub luag hauj lwm tseem ceeb. Qhov thib ob, kev saib xyuas zoo yuav tsum tau them rau lub sijhawm luv ntawm qhov sib txawv ntawm qhov kub thiab txias mus rau qhov pib ntawm kev kho cua sov tom qab vuam.

③ Cov kev cai tswj kev siv vuam cov khoom siv hluav taws xob yog qhov siab. Cov kev paub dhau los tau ua pov thawj tias qhov cuam tshuam toughness tuaj yeem txhim kho tau zoo los ntawm kev siv cov kab hluav taws xob me me, qhov kub nruab nrab ntawm qhov nruab nrab thiab me me vuam kab hluav taws xob.

④ Cov pob qij txha welded yog cov qauv tsis ruaj khov nrog cov tawv tawv siab tom qab vuam, thiab kev kho cua sov yuav tsum tau ua tom qab vuam.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Kev xaiv ntawm txoj kev vuam

P91 steel muaj lub siab tawv tawv thiab muaj kev nkag siab zoo rau vuam cov kab nrib pleb. Nws tuaj yeem welded nrog tungsten argon arc bottoming thiab qis hydrogen hom electrode filling thiab npog electrode arc vuam.

• Vuam txheej txheem specifications thiab parameters

Txheej naj npawb	Vuam txoj kev	Cov khoom siv vuam		Vuam tsis
		Qauv	Specification	Polarity	Hluav taws xob tam sim no (A)	Qhov voltage (V)
1-2	GTAW	ER90S-B9	φ2.5	Kev sib txuas ncaj qha tam sim no	90-110	10-14
3-6	SMAW	E9015-B9	φ3.2	DC rov qab kev twb kev txuas	100-120	20-24
Saum 7 pem teb	SMAW	E9015-B9	φ4.0	DC rov qab kev twb kev txuas	135-150	20-24
Npog txheej	SMAW	E9015-B9	φ3.2	DC rov qab kev twb kev txuas	100-120	20-24