I-AISI 347 iStainless Steel esetyenziselwa ukuCalwa

Insimbi engagqwali yintsimbi ephezulu yealloy enokumelana nokubola emoyeni okanye kwimithombo yeendaba ekrwadayo ngokwekhemikhali. Intsimbi estainless ayifuni kunyango lomphezulu onje ngokutyalwa kombala, kodwa inokuba neempawu zendalo zentsimbi engatyiwayo. Ukusuka kwimbono ye-metallographic, insimbi engenasici iqulethe ichromium, eyenza ifilimu yechromium encinci kakhulu kumphezulu. Le filimu inokwahlulaiicasts steel stainlessukusuka ekungeneni kweoksijini, ngaloo ndlela inika ukuxhathisa ukubola. Ukuze kugcinwe ukuxhathisa kwe-corrosion yendalo yensimbi engenasici, ngokuqhelekileyo, isinyithi esingenasici kufuneka sibe ngaphezu kwe-12% yechromium.

I-347 insimbi engenasici ibakala kwinqanaba le-ASTM A240 / 240M. Yintsimbi ye austenitic stainless. E-China, ibakala elihambelanayo le-347 yensimbi engenasici yi-0Cr18Ni11Nb. Ngenxa yokuba iqulethe inani elithile le-niobium (Nb) element, i-347 yensimbi engenasici inokumelana kakuhle ne-crystallographic corrosion, kwaye inamandla aphezulu kunye neplastiki. I-347 insimbi engenasici inokumelana ne-oxidation elungileyo kunye nokushisela emoyeni ongaphantsi kwe-800 ° C.

I-347 insimbi engenasici inokumelana ne-corrosion elungileyo kumajelo eendaba anjengeeasidi, iialkali, kunye nezisombululo zetyuwa. Ubushushu bobushushu obuphezulu bokugqabhuka kwentsebenzo kunye nobushushu obuphezulu bokumelana noxinzelelo lweempawu zentsimbi ezingama-347 zingcono kunezo304 intsimbi engenasici. Imimandla yesicelo sayo ibanzi kakhulu, njengokubhabha, ukuveliswa kwamandla, ikhemistri, ishishini lepetrochemical, ukutya, ukwenza iphepha,ukukhupha okuninzi, njl.

Ukwakhiwa kweekhemikhali ze-347 yensimbi engenasici kulandelayo:

Ikhabhoni C: ≤0.08%
ISilicon Si: ≤1.00%
Manganese uMn: ≤2.00%
Phosphorus P: ≤0.045%
Isulfure S: ≤0.030%
IChromium Cr: 17.00 ~ 19.00
Nikel Ni: 9.00 ~ 12.00
I-Niobium Nb: ≥10*C %

Iimpawu zemishini ye-347 yensimbi engenasici (imeko yesisombululo esiqinileyo) zilandelayo:

Amandla esivuno (N/mm2) ≥205
Amandla okuqina (N/mm2) ≥515
Ukwandiswa (%) ≥ 40
Ukuqina: HB: ≤187