Igwe anaghị agba nchara bụ nnukwu alloy nke nwere ike iguzogide corrosion na ikuku ma ọ bụ mgbasa ozi na-emebi kemịkalụ. Igwe anaghị agba nchara adịghị mkpa ka a na-enweta ọgwụgwọ n'elu dịka ịkwanye agba, mana ọ nwekwara ike ịnwe ihe dị n'elu ala nke igwe anaghị agba nchara. Site n'echiche metallographic, igwe anaghị agba nchara nwere chromium, nke na-eme ihe nkiri chromium dị ezigbo mkpa n'elu. Ihe nkiri a nwere ike kewapụ yaigwe anaghị agba ncharasite na ịbanye oxygen, si otú a na-enye nguzogide corrosion. Iji nọgide na-enwe nguzogide corrosion nke igwe anaghị agba nchara, n'ozuzu n'ikwu okwu, igwe anaghị agba nchara ga-enwerịrị ihe karịrị 12% chromium.
347 igwe anaghị agba nchara bụ ọkwa na ọkọlọtọ ASTM A240/240M. Ọ bụ austenitic igwe anaghị agba nchara. Na China, kwekọrọ na ọkwa nke 347 igwe anaghị agba nchara bụ 0Cr18Ni11Nb. N'ihi na ọ nwere ụfọdụ ihe niobium (Nb) element, 347 igwe anaghị agba nchara nwere ezigbo nguzogide crystallographic corrosion, na nwere dịtụ elu ike na plasticity. 347 igwe anaghị agba nchara nwere ezigbo nguzogide oxidation na weldability na ikuku n'okpuru 800 Celsius.
Igwe anaghị agba nchara 347 nwere ezigbo nguzogide corrosion na mgbasa ozi kemịkalụ dị ka acid, alkalis, na ngwọta nnu. Nrụgide nrụgide nrụgide dị elu na oke okpomọkụ na-eguzogide nrụgide nrụnye akụrụngwa nke 347 igwe anaghị agba nchara dị mma karịa nke304 igwe anaghị agba nchara. Mpaghara ngwa ya dịkwa obosara nke ukwuu, dị ka ụgbọ elu, ọgbọ ike, kemistri, ụlọ ọrụ petrochemical, nri, ime akwụkwọ,ikpochapu otutu, wdg.
Ihe mejupụtara kemịkalụ nke 347 igwe anaghị agba nchara bụ nke a:
Carbon C: ≤0.08%
Silicon Si: ≤1.00%
Manganese mmadụ: ≤2.00%
Phosphorus P: ≤0.045%
Sulfur S: ≤0.030%
Chromium Cr: 17.00 ~ 19.00
Nickel Ni: 9.00 ~ 12.00
Niobium Nb: ≥10*C %
Njirimara akụrụngwa nke igwe anaghị agba nchara 347 (steeti ngwọta siri ike) bụ ndị a:
Ike mpụta (N/mm2) ≥205
Ike ntanye (N/mm2) ≥515
Mgbatị (%) ≥ 40
Isi ike: HB: ≤187
Oge nzipu: Dec-09-2023