1. Carbon steel thiab qis alloy steel
1.1 Lub hardness ntawm carbon steel thiab tsawg alloy steel yog tsawg dua los yog sib npaug zos rau 22HRC, thiab cov nram qab no tej yam kev mob tau ntsib:
1. 1.1 Nickel cov ntsiab lus<1%
1.1.2 Nws yog ib qho tsim nyog yuav tsum tau tso tawm thermal stress tshwm sim los ntawm dov, txias nias los yog lwm yam txheej txheem tsim, uas yog tshwm sim los ntawm cov txheej txheem txheej fiber ntau deformation ntau tshaj 5 feem pua. Qhov tsawg kawg nkaus thermal kev ntxhov siab tso tawm kub yog 595 degree. Raws li cov kev cai ntawm ASME Volume VIII, Division I. Thiab ua tau raws li ib qho ntawm cov kev kho cua sov hauv qab no:
a) kub dov xeev
b) Annealed xeev
c) Normalizing lub xeev
d) Normalized thiab tempered xeev
e) Normalizing, austenitizing, quenching thiab tempering xeev
f) Austenitized, quenched thiab tempered xeev
1.2 ASTM A105 forging hardness Tsawg dua los yog sib npaug rau 187HB.
1.3 Nws yog txwv tsis pub siv cov hlau txiav dawb.
2. Austenitic stainless hlau
2.1 Cov tshuaj muaj pes tsawg leeg ntawm austenitic stainless hlau ua tau raws li qhov yuav tsum tau muaj nyob rau hauv Table 1, thiab tsis muaj kev ua haujlwm txias yog siv los txhim kho nws cov khoom siv kho tshuab, thiab nws yog siv los ntawm qhov siab tshaj plaws hardness ntawm 22HRC tom qab kev daws teeb meem, txawm tias nws yog casting lossis forging. . .
| C | 0.08 feem pua Max | Cr | 16% Min. |
| Ni | 8% Min. | P | 0.045 feem pua Max |
| S | 0.04 feem pua | Mn | 2.0 feem pua Max |
| Si | 2.0 feem pua Max |
2.2 High-alloy austenitic stainless steel with Ni%+2Mo%>30% and Mo%>2 feem pua yog siv tau rau hauv lub xeev cov tshuaj.
2.3 PREN>40 (Cr%+3.3(Mo%+0.5W%)+16N%>40 feem pua ) High-alloy austenitic stainless hlau tau txais nyob rau hauv lub xeev cov tshuaj.
3. Duplex stainless hlau
Duplex stainless hlau tau txais nyob rau hauv cov tshuaj annealing thiab kua quenching, txias ua hauj lwm tej yam kev mob, ferrite muaj pes tsawg leeg 35 ~ 65 feem pua, hnub nyoog hardening tshav kub kev kho mob yog txwv tsis pub.
