AmaBanga 321 kunye ne-347 yintsimbi ye-austenitic eyisiseko ye-18/8 (iBakala 304) iqiniswe yi-Titanium (321) okanye i-Niobium (347) izongezo.La mabanga asetyenziswa ngenxa yokuba awakhathali kwi-corrosion ye-intergranular emva kokufudumeza ngaphakathi koluhlu lwemvula ye-carbide ye-425-850 °C.IBanga lama-321 linqanaba lokukhethwa kwezicelo kuluhlu lobushushu ukuya kuthi ga kwi-900 °C, ukudibanisa amandla aphezulu, ukuchasana nokulinganisa kunye nokuzinza kwesigaba kunye nokuchasana nokukhula okumanzi okulandelayo.
IBanga le-321H luhlengahlengiso lwe-321 kunye nomxholo ophezulu wekhabhoni, ukubonelela ngamandla aphuculweyo obushushu obuphezulu.
Umda nge-321 kukuba i-titanium ayidlulisi kakuhle kwi-arc ephezulu yobushushu, ngoko ke ayikhuthazwa njengento esetyenziswayo ye-welding.Kule meko ibakala 347 likhethwa - i-niobium yenza umsebenzi ofanayo wokuzinzisa i-carbide kodwa inokudluliselwa kwi-arc welding.IBakala 347, ke ngoko, ngumgangatho osetyenziswayo wokuwelda u-321. IBakala 347 lisetyenziswa ngamaxesha athile kuphela njengezinto ezizipleyiti zabazali.
Njengamanye amabakala e-austenitic, i-321 kunye ne-347 ineempawu ezibalaseleyo zokubumba kunye ne-welding, i-brake ngokulula okanye i-roll-formed kwaye ineempawu ezibalaseleyo ze-welding.I-post-weld annealing ayifuni.Kananjalo banokuqina okuhle kakhulu, kude kube phantsi ukuya kumaqondo obushushu e-cryogenic.IBanga le-321 alipolisheli kakuhle, ngoko ke alikhuthazwa ukuba lifake izicelo zokuhombisa.
IBanga le-304L lifumaneka ngokulula kwiifom ezininzi zemveliso, kwaye ke isetyenziswa ngokubanzi ngokukhetha i-321 ukuba imfuno yeyokumelana ne-intergranular corrosion emva kwe-welding.Nangona kunjalo, i-304L inamandla asezantsi ashushu kune-321 kwaye ngoko ayilona khetho lungcono ukuba imfuno iyaxhathisa indawo yokusebenza engaphezulu kwe-500 °C.
Iimpawu eziphambili
Ezi zakhiwo zichazwe kwiimveliso eziqengqelekayo (ipleyiti, icwecwe, kunye nekhoyili) kwi-ASTM A240/A240M.Iipropati ezifanayo kodwa zingafane zichazwe kwezinye iimveliso ezinjengombhobho kunye nebar kwiinkcukacha zazo.
Ukuqamba
Uluhlu oluqhelekileyo lokuqulunqa kwibanga lama-321 lamaphepha ensimbi anikezelwa kwitheyibhile yoku-1.
Uluhlu loku-1.Ukuqulunqwa koluhlu lwe-321-grade steel stainless
| IBanga | C | Mn | Si | P | S | Cr | Mo | Ni | N | Okunye | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 321 | imiz. max | - 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 | - | 9.0 12.0 | 0.10 | Ti=5(C+N) 0.70 |
| 321H | imiz. max | 0.04 0.10 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 | - | 9.0 12.0 | - | Ti=4(C+N) 0.70 |
| 347 | imiz. max | 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 | - | 9.0 13.0 | - | Nb=10(C+N) 1.0 |
Iipropati zoomatshini
Iimpawu eziqhelekileyo zoomatshini kwibakala lama-321 amaxwebhu entsimbi anikwe kwitafile yesi-2.
Itheyibhile 2.Iipropati ze-Mechanical ze-321-grade yensimbi engenasici
| IBanga | Amandla e-Tensile (MPa) min | Amandla eSivuno 0.2% Ubungqina (MPa) min | Ubude (% kwi-50 mm) min | Ukuqina | |
|---|---|---|---|---|---|
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 321 | 515 | 205 | 40 | 95 | 217 |
| 321H | 515 | 205 | 40 | 95 | 217 |
| 347 | 515 | 205 | 40 | 92 | 201 |
Iipropati Zomzimba
Iimpawu ezibonakalayo zemigangatho ye-321 yensimbi engenasici inikwe kwitheyibhile yesi-3.
Itheyibhile 3.Iimpawu ezibonakalayo ze-321-grade yensimbi engenasici kwimeko edibeneyo
| IBanga | Ubuninzi (kg/m3) | I-Elastic Modulus (GPA) | I-Mean Coefficient yoKwandiswa kweThermal (μm/m/°C) | I-Thermal Conductivity (W/mK) | Ubushushu obubodwa 0-100 °C (J/kg.K) | Ukuxhathisa koMbane (nΩ.m) | |||
|---|---|---|---|---|---|---|---|---|---|
| 0-100 °C | 0-315 °C | 0-538 °C | kwi-100 °C | ku-500 °C | |||||
| 321 | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
Uthelekiso lweNgcaciso yeBanga
Ukuthelekisa ukulinganisa ukulinganisa kwemigangatho ye-321 yamaphepha ensimbi anikezelwa kwitafile yesi-4.
Uluhlu lwesi-4.Iimpawu zeBanga le-321-grade stainless steel
| IBanga | Inombolo ye-UNS | Old British | I-Euronorm | Swedish SS | I-JIS yaseJapan | ||
|---|---|---|---|---|---|---|---|
| BS | En | No | Igama | ||||
| 321 | S32100 | 321S31 | 58B, 58C | 1.4541 | X6CrNiTi18-10 | 2337 | SUS 321 |
| 321H | S32109 | 321S51 | - | 1.4878 | X10CrNiTi18-10 | - | I-SUS 321H |
| 347 | S34700 | 347S31 | 58G | 1.4550 | X6CrNiNb18-10 | 2338 | SUS 347 |
Ixesha lokuposa: Jun-06-2023