Mhando ina dzeStainless Simbi uye Basa reAlloying Elements:
Simbi isina tsvina inogona kuiswa mumhando ina huru: austenitic, martensitic, ferritic, uye duplex simbi isina tsvina (Tafura 1). Iyi kupatsanurwa kunoenderana neiyo microstructure yesimbi isina tsvina pane tembiricha yekamuri. Kana pasi-kabhoni simbi inopisa kusvika 1550 ° C, microstructure yayo inoshanduka kubva mukamuri-tembiricha ferrite kusvika austenite. Pakutonhora, iyo microstructure inodzokera kune ferrite. Austenite, iyo iripo pakudziya kwepamusoro, haisi-magnetic uye kazhinji ine simba rakaderera asi iri nani ductility kana ichienzaniswa nekamuri-tembiricha ferrite.
Kana iyo chromium (Cr) iri musimbi inodarika 16%, iyo kamuri-tembiricha microstructure inova yakagadziriswa muchikamu cheferrite, ichichengetedza ferrite pamatembiricha ese. Mhando iyi inonzi ferritic Stainless steel. Kana zvese zviri zviviri chromium (Cr) zviri pamusoro pe17% uye nickel (Ni) zviri pamusoro pe7%, iyo austenite chikamu chinova chakadzikama, ichichengetedza austenite kubva kune yakaderera tembiricha kusvika pakunyungudika.
Austenitic Stainless simbi inowanzonzi "Cr-N" mhando, nepo martensitic uye ferritic Stainless simbi dzinonzi zvakananga "Cr" mhando. Zvinhu musimbi isina tsvina uye masimbi ekuzadza zvinogona kuiswa muzvikamu zve austenite-kugadzira zvinhu uye ferrite-kugadzira zvinhu. Iwo ekutanga austenite-ekugadzira zvinhu anosanganisira Ni, C, Mn, uye N, nepo ekutanga ferrite-ekugadzira zvinhu anosanganisira Cr, Si, Mo, uye Nb. Kugadzirisa zviri mukati mezvinhu izvi zvinogona kudzora chikamu cheferrite mune weld joint.
Austenitic Stainless simbi, kunyanya kana iine isingasviki 5% nitrogen (N), iri nyore kupinza uye inopa mhando yewelding iri nani kana ichienzaniswa nesimbi isina tsvina ine yakaderera N content. Austenitic Stainless steel weld joints anoratidza simba rakanaka uye ductility, kazhinji kubvisa kudiwa kwe pre-welding uye post-welding heat treatments. Mumunda weStainless steel welding, austenitic Stainless simbi inoita 80% yezvese kushandiswa kwesimbi, zvichiita kuti ive iyo inonyanya kutariswa yechinyorwa ichi.
Nzira yekusarudza yakaruramaStainless steel weldingConsumables, waya uye electrodes?
Kana mashoko evabereki akafanana, mutemo wokutanga ndewo“kufananidza zvinhu zvevabereki.” Semuenzaniso, kana marasha akabatana ne310 kana 316 simbi isina tsvina, sarudza inoenderana nemarasha zvinhu. Kana welding zvinhu zvakasiyana, tevera gwara rekusarudza base zvinhu zvinoenderana nepamusoro alloying element yezvinhu. Semuenzaniso, kana welding 304 uye 316 Stainless simbi, sarudza 316 mhando welding consumables. Zvisinei, kunewo zvakawanda zvakakosha zviitiko apo nheyo ye "kufananidza nheyo yesimbi" haina kuteverwa. Muchiitiko ichi, zvinokurudzirwa "kutarisa kune welding consumable selection chart". Semuyenzaniso, mhando 304 Stainless simbi ndiyo yakajairika base zvinhu, asi hapana mhando 304 welding tsvimbo.
Kana iyo welding zvinhu ichida kuenderana ne base simbi, ungasarudza sei welding zvinhu kuti weld 304 Stainless simbi waya uye electrode?
Paunenge welding 304 Stainless simbi, shandisa type 308 welding consumables nekuti mamwe maelementi mu308 Stainless simbi anogona kudzikamisa nzvimbo yeweld. Iyo 308L zvakare isarudzo inogamuchirwa. L inoratidza low carbon content, 3XXL Stainless steel inoratidza kabhoni ye 0.03%, ukuwo standard 3XX Stainless simbi inogona kusvika 0.08% carbon content. Sezvo L-mhando welding zvinobatika zviri zvemhando imwechete yemhando sezvisiri-L-mhando welding zvinodyiwa, vagadziri vanofanirwa kufunga nezvekushandisa L-mhando welding zvinodyiwa zvakasiyana nekuti yakaderera kabhoni yemukati inogona kuderedza tsika ye intergranular corrosion. Muchokwadi, munyori anotenda kuti kana vagadziri vachida kukwidziridza zvigadzirwa zvavo, L-yakaita yero zvinhu zvichanyanya kushandiswa. Vagadziri vanoshandisa GMAW welding nzira vari kufungawo kushandisa 3XXSi mhando Stainless simbi nekuti SI inogona kuvandudza wetting uye leakage zvikamu. Kana iyo marasha chidimbu chine peak yepamusoro kana welding pool yekubatanidza haina kunaka paweld toe yekona inononoka musono kana lap weld, kushandiswa kwegasi shielded welding waya ine S inogona kunyorovesa musono wemarasha uye nekuvandudza deposition rate. .
Nguva yekutumira: Sep-26-2023