Intshayelelo
IBakala 304 ngumgangatho “18/8″ ongenastainless;iyona nto ixhaphakileyo kwaye isetyenziswa kakhulu insimbi engenasici, ekhoyo kuluhlu olubanzi lweemveliso, iifom kunye nokugqiba kunanoma iyiphi enye.Ineempawu ezibalaseleyo zokubumba kunye ne-welding.Ulwakhiwo olulungeleleneyo lwe-austenitic lweBanga lama-304 lwenza ukuba lutsalwe ngokunzulu ngokuqatha ngaphandle kokuqhotyoshelwa okuphakathi, nto leyo eyenze eli bakala libe longamele ekwenziweni kwamalungu atsaliweyo angenanto anjengesinki, i-hollow-ware kunye neepani.Kwezi zicelo kuqhelekile ukusebenzisa iintlobo ezizodwa ze-"304DDQ" (Umgangatho woMzobo oNzulu).IBanga lama-304 liqhekezwa ngokulula okanye liyilwe libe ngamacandelo ahlukeneyo ukuze kusetyenziswe ushishino, ulwakhiwo, kunye nothutho.IBanga lama-304 nalo lineempawu zokuwelding ezibalaseleyo.I-post-weld annealing ayifuni xa udibanisa amacandelo amancinci.
IBakala 304L, i-low carbon version ye-304, ayifuni i-post-weld annealing kwaye isetyenziswa kakhulu kwi-heavy gauge components (ngaphezulu kwe-6mm).IBanga le-304H elinomxholo walo ophezulu wekhabhoni lifumana ukusetyenziswa kumaqondo obushushu aphezulu.Isakhiwo se-austenitic sikwanika la mabanga ukuqina okugqwesileyo, kude kube phantsi ukuya kumaqondo obushushu e-cryogenic.
Iimpawu eziphambili
Ezi zakhiwo zichazwe kwimveliso ephothiweyo (ipleyiti, iphepha kunye nekhoyili) kwi-ASTM A240/A240M.Iipropati ezifanayo kodwa zingafane zichazwe kwezinye iimveliso ezinjengombhobho kunye nebar kwiinkcukacha zazo.
Ukuqamba
Uluhlu oluqhelekileyo lokuqulunqa kwibakala lama-304 iintsimbi ezingenasici zinikwe kwitheyibhile yoku-1.
| IBanga | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304 | imiz. max. | - 0.08 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | - 0.10 |
| 304L | imiz. max. | - 0.030 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 12.0 | - 0.10 |
| 304H | imiz. max. | 0.04 0.10 | - 2.0 | - 0.75 | -0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | |
Uluhlu loku-1.Ukuqulunqwa koluhlu lwe-304 grade steel stainless
Iipropati zoomatshini
Iimpawu eziqhelekileyo zoomatshini kwibakala lama-304 iintsimbi ezingenasici zinikwe kwitheyibhile yesi-2.
Itheyibhile 2.Iimpawu zeMechanical ze-304 grade steel stainless
| IBanga | Amandla e-Tensile (MPa) min | Amandla eSivuno 0.2% Ubungqina (MPa) min | Ubude (% kwi-50mm) min | Ukuqina | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
| 304L | 485 | 170 | 40 | 92 | 201 |
| 304H | 515 | 205 | 40 | 92 | 201 |
| I-304H ikwanayo nemfuneko yobukhulu obuziinkozo be-ASTM enguNombolo yesi-7 okanye erhabaxa. | |||||
Ukunyangwa kokuMhlwa
Ugqwesileyo kuluhlu olubanzi lwemekobume ye-atmospheri kunye nemithombo yeendaba ezininzi ezonakalisayo.Ixhomekeke kwimingxuma kunye nokuhlwa kwemingxuma kwindawo efudumeleyo yekloridi, kunye nokucinezela ukuqhekeka komhlwa ngaphezulu kwe-60°C.Ithathwa njengokumelana namanzi aselwayo ukuya kuthi ga kwi-200mg/L yekloridi kumaqondo obushushu akwindawo engqongileyo, yehliswa malunga ne-150mg/L ku-60°C.
Ukumelana nobushushu
Ukumelana ne-oxidation elungileyo kwinkonzo yethutyana ukuya kuma-870°C nakwinkonzo eqhubekayo ukuya kuma-925°C.Ukusetyenziswa ngokuqhubekayo kwe-304 kwi-425-860 ° C uluhlu alukhuthazwa ukuba ukuxhatshazwa kwe-corrosion yamanzi okulandelayo kubalulekile.IBanga le-304L lixhathisa ngakumbi kwimvula ye-carbide kwaye inokufudumeza kuluhlu lobushushu obungentla.
IBanga lama-304H linamandla aphezulu kumaqondo obushushu aphezulu ngoko ke lisoloko lisetyenziselwa ulwakhiwo kunye noxinzelelo lwezicelo eziqulathe amaqondo obushushu angaphezu kwama-500°C nokuya kutsho kuma-800°C.I-304H iya kwaziswa kuluhlu lweqondo lokushisa lwe-425-860 ° C;oku akuyongxaki kwizicelo zobushushu obuphezulu, kodwa iyakukhokelela ekuncitshisweni kokunganyangeki kwe-aqueous corrosion.
Unyango lobushushu
Unyango lwesisombululo (Annealing) - Ukushisa kwi-1010-1120 ° C kwaye upholise ngokukhawuleza.La mabanga akakwazi ukuqina ngonyango lwe-thermal.
Ukuwelda
Ukuweldability okugqwesileyo ngazo zonke iindlela zokudityaniswa okusemgangathweni, zombini kunye nangaphandle kweentsimbi zokuzalisa.AS 1554.6 pre-qualifying welding of 304 with Grade 308 and 304L with 308L rods or electrode (kunye ne-silicon ephezulu elinganayo).Amacandelo e-welded welded kwiBanga lama-304 anokufuna i-post-weld annealing ukwenzela ukuxhathisa okukhulu kwi-corrosion.Oku akufuneki kwiBakala 304L.IBakala 321 linokusetyenziswa njengenye indlela ye-304 ukuba i-welding yecandelo elinzima liyafuneka kwaye unyango lwe-post-weld heat treatment alunakwenzeka.
Usetyenziso
Usetyenziso oluqhelekileyo lubandakanya:
Izixhobo zokulungisa ukutya, ngakumbi ekudidiyeleni ibhiya, ekusetyenzweni kobisi kunye nokwenza iwayini.
Iibhentshi zasekhitshini, iisinki, izikhonkwane, izixhobo kunye nezixhobo zombane
Iphaneli yoyilo lwezakhiwo, iintsimbi kunye ne-trim
Izikhongozeli zemichiza, kubandakanywa nezothutho
IziTshintshiso zoBubushushu
Izikrini ezilukiweyo okanye ezidityanisiweyo zokwembiwa kwemigodi, ukugrumba kunye nokuhluzwa kwamanzi
Iifasteners ezinemisonto
Imithombo