Vanhu vazhinji vanofunga kuti Stainless simbi isimbi isingaite ngura uye inoshingirira asidhi uye alkali. Asi muupenyu hwezuva nezuva, vanhu vanoona kuti hari dzesimbi dzisina simbi nemaketeni emagetsi anoshandiswa pakubika kazhinji ane ngura kana kuti ngura. Chii chaizvo chiri kuitika?
Ngatitangei kunzwisisa, chii chinonzi Stainless steel?
Zvinoenderana neyakajairwa yenyika GB/T20878-2007 "Stainless Steel uye Heat-Resistant Steel Magiredhi uye Chemical Compositions", tsananguro yesimbi isina tsvina ndeye: Stainless simbi uye corrosion resistance seyakanyanya hunhu, ine chromium yemukati inosvika 10.5% uye kabhoni yemukati isingapfuure 1.2%. simbi. Mhando dzinopesana nemakemikari corrosion media (asidhi, alkali, munyu, nezvimwewo) inonzi acid-resistant steel.
Saka sei Stainless simbi isingaite ngura?
Nekuti simbi isina tsvina, mushure mekuumbwa, inozopinda yakazara pickling uye passivation kubvisa marudzi ese emafuta, ngura uye imwe tsvina pamusoro. Iyo yepamusoro ichave yakafanana sirivheri, ichigadzira yunifomu uye dense passivation firimu, nokudaro ichideredza kushorwa kwesimbi isina tsvina kune oxidizing media. Mwero wekuora kwepakati uye yakagadziridzwa kusaita ngura.
Saka nefirimu rakadaro rekufambisa pasimbi isina tsvina, hazvizoiti ngura here?
Kutaura zvazviri, muupenyu hwedu hwezuva nezuva, maion chloride mumunyu ane mhedzisiro inoparadza pafirimu yepasi pesimbi isina tsvina, iyo inogona kukonzera kunaya kwezvinhu zvesimbi.
Parizvino, ne theoretically, kune marudzi maviri ekukuvadza kune passivation firimu inokonzerwa ne chlorine ions:
1. Phase film theory: Chloride ions ine radius diki uye simba rekupinda nekugona. Vanokwanisa kupinda nyore nyore maburi madiki-diki mufirimu reoxyde, vosvika pamusoro pesimbi, uye vachidyidzana nesimbi kuti vagadzire zvinonyungudika, izvo zvinoshandura chimiro cheiyo oxide film.
2. Adsorption theory: Chloride ions ine simba rakasimba rekuve adsorbed nesimbi. Dzinogona kushambadzwa nesimbi zviri nani uye dzinodzinga okisijeni kubva pamusoro pesimbi. Chloride ions uye maion eokisijeni anokwikwidzana kune adsorption point pamusoro pesimbi uye inogadzira chloride nesimbi; Iyo adsorption yechloride uye simbi haina kugadzikana, ichigadzira soluble zvinhu, izvo zvinotungamira mukukurumidzira ngura.
Zvekuongorora simbi isina tsvina:
Stainless simbi yekuongorora yakakamurwa kuita matanhatu ekuita bvunzo uye maviri ekuongorora mapurojekiti
Performance Testing:
Zvimiro zvemuviri, makemikari zvimiro, michina zvivakwa, processability, metallographic yekuongorora uye isiri-inoparadza yekuongorora.
Analysis Project:
Kuongororwa kwekuputsika, kuongororwa kwekuora, nezvimwewo;
Pamusoro pezviyero zvinoshandiswa kusiyanisa GB/T20878-2007 "Stainless Steel uye Heat-Resistant Steel Grades uye Chemical Compositions", kune zvakare:
GB/T 13305
GB/T 13671
GB/T 19228.1, GB/T 19228.2, GB/T 19228.3
GB/T 20878 Simbi isina simbi uye inodzivirira kupisa simbi mamakisi uye maumbirwo emakemikari
Chiyero chenyika chekudya-giredhi yeStainless simbi yekuongorora ndeye GB9684-2011 (stainless simbi zvigadzirwa). Kuongororwa kwechikafu-giredhi simbi isina tsvina yakakamurwa kuita zvikamu zviviri: huru zvinhu uye zvisiri-main materials.
Mashandiro:
1. Kumaka: Kuedza kwesimbi isina tsvina kunoda kumaka magumo emidziyo yekuyedza nependi yemavara akasiyana.
2. Kudhinda: Nzira yekupfapfaidza pendi pane zvikamu (kumagumo, zviso zvekupedzisira) zvakatsanangurwa mukuongorora, zvichiratidza giredhi, chiyero, tsanangudzo, nezvimwe zvezvinhu.
3. Tag: Mushure mekunge kuongorora kwapera, zvinhu zvichaiswa mumasumbu, mabhokisi, uye shafts kuratidza giredhi rayo, saizi, uremu, nhamba yakajairwa, mutengesi, nezvimwe.
Nguva yekutumira: Zvita-27-2023