Nhanganyaya
Giredhi 304 ndiyo simbi isingatsvedzeri ye "18/8″; ndiyo simbi isingatsvedzeri inoshandiswa zvakanyanya uye inonyanya kushandiswa, inowanikwa mumhando dzakasiyana-siyana dzezvigadzirwa, mafomu uye kupedzisa kupfuura chero imwe. Ine hunhu hwakanaka hwekuumba uye hwekusonta. Maumbirwo akaenzana eGiredhi 304 anoita kuti ikwanise kudhonzwa yakadzika zvakanyanya pasina kudonhedzwa kwepakati, izvo zvakaita kuti giredhi iri rive guru mukugadzira zvikamu zvisingatsvedzeri zvakaita semasinki, zvinhu zvisina chinhu uye mapani. Pakushandisa uku zvakajairika kushandisa mhando dzakasiyana dze "304DDQ" (Deep Drawing Quality). Giredhi 304 inobhurwa kana kumonerwa nyore nyore kuita zvikamu zvakasiyana-siyana zvekushandisa muminda yeindasitiri, yezvivakwa, uye yekufambisa. Giredhi 304 ine hunhu hwakanaka hwekusonta. Kusonta mushure mekusonta hakudiwi pakusonta zvikamu zvitete.
Giredhi 304L, iyo ine kabhoni shoma ye304, haidi annealing mushure mekuweldwa saka inoshandiswa zvakanyanya muzvikamu zve gauge zvinorema (zvinopfuura 6mm). Giredhi 304H ine kabhoni yakawanda inoshandiswa pakupisa kwakakwira. Chimiro che austenitic chinopawo magiredhi aya kusimba kwakanaka, kunyangwe kusvika pakupisa kwe cryogenic.
Zvimiro Zvikuru
Hunhu uhwu hwakatsanangurwa kune chigadzirwa chakapetwa chakati sandara (plate, sheet uye coil) muASTM A240/A240M. Hunhu hwakafanana asi husiri hwechokwadi hwakatsanangurwa kune zvimwe zvigadzirwa zvakaita semapaipi nebhawa muzvirevo zvazvo.
Kuumbwa
Mhando dzakajairika dzesimbi dzisina ngura dzegiredhi 304 dzakapihwa mutafura 1.
| Giredhi | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304 | miniti. zvakawanda. | - 0.08 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | - 0.10 |
| 304L | miniti. zvakawanda. | - 0.030 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 12.0 | - 0.10 |
| 304H | miniti. zvakawanda. | 0.04 0.10 | - 2.0 | - 0.75 | -0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | |
Tafura 1.Kuumbwa kwesimbi isina ngura ye304 grade
Zvivakwa zveMichina
Hunhu hwemakanika hwesimbi dzisina ngura dzegiredhi 304 hunoratidzwa mutafura 2.
Tafura 2.Hunhu hwesimbi isina ngura yemhando ye304
| Giredhi | Simba reKusimba (MPa) min | Simba reGoho 0.2% Uchapupu (MPa) min | Kureba (% mu 50mm) min | Kuoma | |
| Rockwell B (HR B) yepamusoro | Brinell (HB) yepamusoro | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
| 304L | 485 | 170 | 40 | 92 | 201 |
| 304H | 515 | 205 | 40 | 92 | 201 |
| 304H ine chinodiwawo chehukuru hweASTM Nhamba 7 kana kuti hwakakora. | |||||
Kuramba Kuora
Yakanaka kwazvo munzvimbo dzakasiyana-siyana dzemumhepo uye munzvimbo dzakawanda dzinopisa. Inokwanisa kukanganiswa nengura kana kukuvara munzvimbo dzinodziya dzechloride, uye inogona kupwanyika nengura pamusoro pe60°C. Inoonekwa seisingatsvedze mvura inonwiwa ine machloride anosvika 200mg/L patembiricha yekunze, ichidzikira kusvika pa150mg/L pa60°C.
Kuramba Kupisa
Kudzivirira oxidation zvakanaka pakudziya kwemhepo kusvika 870°C uye pakudziya kwemhepo kusvika 925°C. Kushandiswa kwe304 nguva dzose muhuwandu hwe425-860°C hakukurudzirwi kana kuramba kwemvura kuchikosha. Giredhi 304L inodzivirira mvura yekabhoni uye inogona kupiswa kusvika pakupisa kuri pamusoro apa.
Giredhi 304H ine simba rakawanda pakupisa kwakakwira saka inowanzoshandiswa pakushandiswa kwechimiro uye kudzvanywa pakupisa kuri pamusoro pe500°C uye kusvika pa800°C. 304H ichanzwa kupisa kuri pakati pe425-860°C; izvi hazvisi dambudziko pakushandiswa kwekupisa kwakanyanya, asi zvinoguma nekudzikira kwekudzivirira ngura mumvura.
Kurapa Kupisa
Kurapa Mhinduro (Kuisa Mvura) – Pisa kusvika 1010-1120°C wotonhodza nekukurumidza. Magiredhi aya haagoni kuomeswa nekupisa.
Kushongedza
Kugona kupinza zvakanaka kuburikidza nenzira dzese dzakajairwa dzekubatanidza, zvese nesimbi dzinozadza uye dzisina. AS 1554.6 inofanidza kupinza 304 neGiredhi 308 ne304L ne308L tsvimbo kana maelectrode (uye nesilicon yakafanana nazvo). Zvikamu zvakasungirirwa zvakanyanya muGiredhi 304 zvinogona kuda post-weld annealing kuti isanyanya kukora. Izvi hazvidiwi kuGiredhi 304L. Giredhi 321 rinogonawo kushandiswa senzira ye304 kana heavy section welding ichidikanwa uye kurapwa kwekupisa mushure mekupinza simbi hakugoneki.
Mashandisirwo
Maitiro akajairika anosanganisira:
Midziyo yekugadzirisa chikafu, kunyanya mukubika doro, kugadzira mukaka uye kugadzira waini.
Mabhenji ekicheni, masinki, matangi, midziyo nemidziyo yemumba
Mapanera ekuvaka, machira esimbi & zvishongo
Midziyo yemakemikari, kusanganisira yekutakura
Zvinhu Zvinochinja-chinja Kupisa
Zvidzitiro zvakarukwa kana zvakasungirirwa zvekuchera, kuchera matombo uye kusefa mvura
Zvisungo zvine shinda
Zvitubu
