Saukewa: ASTM A213T91(ASME SA213 T91) bututun ƙarfe ne da aka saba amfani da shi wanda ya ƙunshi 8.0% zuwa 9.5% Cr, 0.85% zuwa 1.05% Mo, da sauran abubuwan microalloying.
Wadannan abubuwan haɗin gwal suna samar da bututun ƙarfe na T91 tare da kyakkyawan ƙarfin zafi mai ƙarfi, juriya mai raɗaɗi, da juriya na iskar shaka, yana sanya su yadu amfani a cikin tukunyar jirgi, superheaters, da masu musayar zafi da ke aiki a ƙarƙashin yanayin zafi da matsanancin yanayi.
Lambar UNS: K90901.
T91 karfe bututu za a iya classified a cikinNau'i na 1kumaNau'i na 2, tare da babban bambanci kasancewa ƴan gyare-gyare a cikin sinadaran sinadaran.
Nau'in 2 yana da tsauraran buƙatu don abubuwan sinadaran; alal misali, an rage abun cikin S daga max na 0.010% a cikin nau'in 1 zuwa max na 0.005%, kuma babba da ƙananan iyakokin sauran abubuwa kuma ana daidaita su.
Nau'in 2 an yi niyya ne don ƙarin yanayin zafi mai zafi ko lalata, yana samar da ingantacciyar ƙarfi da juriya.
Na gaba, bari mu ɗan yi la'akari da ƙayyadaddun abubuwan da ake buƙata don Nau'in 1 da Nau'in 2 a cikin binciken samfur.
| Abun ciki, % | ASTM A213 T91 Nau'in 1 | ASTM A213 T91 Nau'in 2 |
| C | 0.07 ~ 0.14 | 0.07 ~ 0.13 |
| Mn | 0.30 ~ 0.60 | 0.30 ~ 0.50 |
| P | 0.020 max | |
| S | 0.010 max | 0.005 max |
| Si | 0.20 ~ 0.50 | 0.20 ~ 0.40 |
| Ni | 0.40 max | 0.20 max |
| Cr | 8.0 ~ 9.5 | |
| Mo | 0.85 ~ 1.05 | 0.80 ~ 1.05 |
| V | 0.18 ~ 0.25 | 0.16 ~ 0.27 |
| B | - | 0.001 max |
| Nb | 0.06 ~ 0.10 | 0.05 ~ 0.11 |
| N | 0.030 ~ 0.070 | 0.035 ~ 0.070 |
| Al | 0.02 max | 0.020 max |
| W | - | 0.05 max |
| Ti | 0.01 max | |
| Zr | 0.01 max | |
| Sauran Abubuwan | - | Ku: 0.10 max SB: 0.003 max Sn: 0.010 max Matsayi: 0.010 max N/Al: 4.0 min |
Nau'in T91 na 1 da 2 suna da ƴan bambance-bambance a cikin abubuwan sinadaran, amma suna raba buƙatu iri ɗaya don kaddarorin injina da maganin zafi.
Tensile Properties
| Daraja | Ƙarfin Ƙarfi | Ƙarfin Haɓaka | Tsawaitawa a cikin 2 in. ko 50 mm |
| T91 Nau'in 1 da 2 | 85 ksi [585 MPa] min | 60 ksi [415 MPa] min | 20% min |
Abubuwan Hardness
| Daraja | Brinell / Vickers | Rockwell |
| T91 Nau'in 1 da 2 | 190 zuwa 250 HBW 196 zuwa 265 HV | 90 HRB zuwa 25 HRC |
Gwajin Lalacewa
Hanyar gwaji za ta bi ka'idodin da suka dace na Sashe na 19 na ASTM A1016.
Za a yi gwajin lallasa ɗaya akan samfurori daga kowane ƙarshen bututu da aka gama, ba wanda aka yi amfani da shi don gwajin walƙiya ba, daga kowane ƙuri'a.
Gwajin Walƙiya
Hanyar gwaji za ta bi ka'idodin da suka dace na Sashe na 22 na ASTM A1016.
Za a yi gwajin walƙiya ɗaya a kan samfurori daga kowane ƙarshen bututu da aka gama, ba wanda aka yi amfani da shi don gwajin baƙaƙe ba, daga kowane ƙuri'a.
Mai ƙera da Sharadi
Bututun ASTM A213 T91 za a yi su ta hanyar tsari mara kyau kuma za su kasance ko dai an gama su da zafi ko kuma an gama su da sanyi, kamar yadda ake buƙata.
Bututun ƙarfe mara nauyi, Tare da ci gaba da tsarin su na kyauta ba tare da walda ba, suna rarraba damuwa a ko'ina a ƙarƙashin yanayin zafi mai zafi, matsa lamba, da kuma yanayin kaya masu rikitarwa, suna ba da ƙarfin ƙarfi, ƙarfi, da juriya ga gajiya.
Maganin zafi
Duk bututun ƙarfe na T91 dole ne a sake mai da su kuma a bi da su da zafi daidai da buƙatun da aka ƙayyade a cikin tebur.
Za a gudanar da maganin zafi daban kuma ban da dumama don samar da zafi.
| Daraja | Nau'in maganin zafi | Austenitizing / Magani Magani | Subcritical Annealing ko Zazzabi |
| T91 Nau'in 1 da 2 | normalize da fushi | 1900 - 1975 ℉ [1040 - 1080 ℃] | 1350 - 1470 ℉ [730 - 800 ℃] |
Don nau'in nau'in nau'in nau'in T91 na Grade, maganin zafi zai tabbatar da cewa bin inganta ƙimar sanyaya daga 1650 °F zuwa 900 °F [900 °C zuwa 480 °C] bai yi hankali ba fiye da 9 °F/min [5 °C/min].
Girman bututun T91 da kaurin bango galibi ana tanadar su da diamita na ciki daga 3.2 mm zuwa diamita na waje na 127 mm, da ƙaramin kauri na bango daga 0.4 mm zuwa 12.7 mm.
Hakanan za'a iya ba da wasu nau'ikan bututun ƙarfe na T91, muddin duk sauran buƙatun ASTM A213 sun cika.
Haƙurin juzu'i na T91 iri ɗaya ne da na T11. Don cikakkun bayanai, zaku iya komawa zuwaT11 Girma da Haƙuri.
| UNS | ASME | ASTM | EN | GB |
| K90901 | Saukewa: ASME SA213T91 | Saukewa: ASTM A335P91 | EN 10216-2 X10CrMoVNb9-1 | GB/T 5310 10Cr9Mo1VNbN |
Samfura:ASTM A213 T91 Nau'in 1 da Nau'in 2 na bututun ƙarfe da kayan aiki marasa ƙarfi;
Girman:1/8 "zuwa 24", ko musamman bisa ga bukatun ku;
Tsawon:Tsawon bazuwar ko yanke don yin oda;
Marufi:Black shafi, beveled iyakar, bututu karshen kare, katako akwakun, da dai sauransu.
Taimako:Takaddun shaida na IBR, TPI dubawa, MTC, yankan, sarrafawa, da gyare-gyare;
MOQ:1 m;
Sharuɗɗan Biyan kuɗi:T / T ko L / C;
Farashin:Tuntube mu don sabon farashin bututun ƙarfe na T91.
