F51, F53, F55, F60 na F61 bụ duplex na super duplex igwe anaghị agba nchara nke ewepụtara na ASTM A182. Ụkpụrụ a bụ otu n'ime ụkpụrụ ndị a na-edekarị maka ịnye igwe anaghị agba nchara.
American Society of Testing and Materials (ASTM) bụ otu n'ime ụlọ ọrụ ụkpụrụ kachasị n'ụwa, na-enyocha, na-achịkọta na ibipụta ụkpụrụ nka maka ọtụtụ ngwa na-arịwanye elu. Ụkpụrụ ebipụta na-amalite site na mkpụrụ akwụkwọ 'A' mkpuchi ọla.
Standard ASTM A182 ('Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service') dị ugbu a na mbipụta 19th (2019). N'ime usoro mbipụta ndị a, etinyela alloys ọhụrụ wee kenye nọmba 'ọkwa' ọhụrụ. Prefix 'F' na-egosi mkpa ọkọlọtọ a na ngwaahịa adịgboroja. A na-achịkọta suffix nọmba ahụ site n'ụdị alloy ya bụ austenitic, martensitic, mana ọ bụghị ndenye kpamkpam. A na-agụ ihe a na-akpọ 'Ferritic-Austenitic' nchara duplex n'etiti F50 na F71, yana ọnụọgụ na-arịgo na-eru nso na akara ule agbakwunyere nso nso a.
Ọkwa dị iche iche nke Duplex igwe anaghị agba nchara
ASTM A182 F51 dabara na UNS S31803. Nke a bụ isiokwu izizi maka igwe anaghị agba nchara 22% Cr duplex. Agbanyeghị, dị ka akọwara n'isiokwu bu ụzọ, ndị na-emepụta na-emeziwanye ihe mejupụtara ya na nsọtụ elu nke oke iji melite nguzogide corrosion. Edebere ọkwa ọkwa a, yana nkọwa siri ike, dị ka F60, na-adaba na UNS S32205. N'ihi ya, S32205 nwere ike ịbụ nke abụọ-gbaara dị ka S31803 ma ọ bụghị vice versa. Ọ bụ ihe dịka 80% nke mmepụta igwe anaghị agba nchara duplex. Langley Alloys ihe ndekọ akụkọ egoSanmac 2205, nke bụ ngwaahịa nke Sandvik nke na-enye 'emelitere machinability dị ka ọkọlọtọ'. Ọnụ ahịa ngwaahịa anyị na-esi na ½" ruo 450mm mmanya siri ike, gbakwunyere oghere oghere na efere kwa.
ASTM A182 F53 dabara na UNS S32750. Nke a bụ 25% Cr super duplex igwe anaghị agba nchara nke Sandvik kwalitere dị kaSAF2507. Site na ụbara ọdịnaya chromium ma e jiri ya tụnyere F51 ọ na-enye nguzogide corrosion ka mma. Ike mkpụrụ ahụ dịkwa elu, na-enye ohere ka ndị na-emepụta akụrụngwa belata nha ngalaba maka ngwa ibu ibu. Langley Alloys na-echekwa SAF2507 ụlọ mmanya siri ike sitere na Sandvik, n'ogo site na ½" ruo 16" dayameta.
ASTM A182 F55 dabara na UNS S32760. Enwere ike ịchọta mmalite nke ọkwa a na mmepe nke Zeron 100 site na Platt & Mather, Manchester UK. Ọ bụ igwe anaghị agba nchara ọzọ nwere nnukwu duplex dabere na ihe mejupụtara 25% Cr, mana yana mgbakwunye tungsten. Langley Alloys ihe ndekọ akụkọ egoSAF32760Ogwe siri ike sitere na Sandvik, na nha site na ½" ruo 16" dayameta.
ASTM A182 F61 dabara na UNS S32550. Nke a, n'aka nke ya, bụ ihe dị ka Ferralium 255, nke mbụ super duplex igwe anaghị agba nchara chepụtara site na.Langley Alloys. Amalitere na 1969, ọ nyela ihe karịrị afọ 50 ọrụ na-aga nke ọma n'ọtụtụ ngwa na-achọsi ike. E jiri ya tụnyere F53 na F55, ọ na-ewepụta ike na arụmọrụ corrosion. Opekempe ike mkpụrụ ya karịrị 85ksi, ebe akara ule ndị ọzọ nwere oke na 80ksi. Tụkwasị na nke ahụ, ọ nwere ihe ruru 2.0% nke ọla kọpa, nke na-enyere aka ịmepụta nguzogide corrosion. Langley Alloys ihe ndekọ akụkọ egoFerralium 255-SD50na nha site na 5/8" ruo 14" mmanya siri ike dayameta, gbakwunyere efere ruru 3" ọkpụrụkpụ.
Oge nzipu: Mar-06-2020