Rarraba Bakin Karfe

Bakin karfe za a iya raba austenitic bakin karfe, ferritic bakin karfe, martensitic bakin karfe da duplex bakin karfe bisa ga metallographic tsarin.

(1) Austenitic bakin karfe

Tsarin zafin jiki na austenitic bakin karfe shine austenite, wanda aka kafa ta hanyar ƙara nickel mai dacewa zuwa babban chromium bakin karfe.

Austenitic bakin karfe yana da tsayayyen tsarin austenite kawai lokacin da Cr ya ƙunshi kusan 18%, Ni 8% zuwa 25%, da C kusan 0.1%. Austenitic bakin karfe dogara ne a kan Cr18Ni9 baƙin ƙarfe tushen gami. Tare da amfani daban-daban, an haɓaka jerin nau'ikan bakin karfe shida na austenitic.

Yawan maki na austenitic bakin karfe:
(1) 1Cr17Mn6Ni15N; (2) 1Cr18Mn8Ni5N; (3) 1Cr18Ni9; (4) 1Cr18Ni9Si3; (5) 06Cr19Ni10; (6) 00Cr19Ni10; (7) 0Cr19Ni9N; (8) 0Cr19Ni10NbN; (9) 00Cr18Ni10N; (10) 1Cr18Ni12; (11) 0Cr23Ni13; (12) 0Cr25Ni20; (13) 0Cr17Ni12Mo2; (14) 00Cr17Ni14Mo2; (15) 0Cr17Ni12Mo2N; (16) 00Cr17Ni13Mo2N; (17) 1Cr18Ni12Mo2Ti; (18) 0Cr; 1Cr18Ni12Mo3Ti; (20) 0Cr18Ni12Mo3Ti; (21) 0Cr18Ni12Mo2Cu2; (22) 00Cr18Ni14Mo2Cu2; (23) 0Cr19Ni13Mo3; (24) 00Cr19Ni13Mo3; (25) 0Cr18Ni16Mo5; (26) 1Cr18Ni9Ti; (27) (29) 0Cr18Ni; 0Cr18Ni13Si4;

Austenitic bakin karfe yana ƙunshe da adadi mai yawa na Ni da Cr, yana yin austenite ƙarfe a zafin jiki. Yana da kyawawan filastik, tauri, weldability, juriya na lalata da kaddarorin maganadisu mara ƙarfi ko rauni. Yana da kyakkyawan juriya na lalata a cikin oxidizing da rage yawan watsa labarai. Ana amfani da shi don yin kayan aiki masu jurewa acid, kamar kwantena masu jure lalata da rufin kayan aiki da sufuri. Hakanan ana iya amfani da bututu, sassan kayan aiki na nitric acid-resistant, da dai sauransu, azaman babban kayan kayan ado. Bakin karfe na Austenitic gabaɗaya yana ɗaukar maganin maganin, wato, ƙarfen yana dumama zuwa 1050 zuwa 1150 ° C, sannan a sanyaya ruwa ko sanyaya iska don samun tsarin austenite lokaci-lokaci.

(2) ferritic bakin karfe

Makin da aka fi amfani da shi na bakin karfe na ferritic: (1) 1Cr17; (2) 00Cr30Mo2; (3) 00Cr17; (4) 00Cr17; (5) 1Cr17Mo; (6) 00Cr27Mo;

Ferritic bakin karfe bakin karfe ne wanda tsarinsa yafi ferrite a dakin da zafin jiki. Chromium abun ciki shine 11% -30%, juriya na lalata, taurin kai da weldability yana ƙaruwa tare da haɓaka abun ciki na chromium, juriyawar lalatawar chloride ya fi sauran nau'ikan bakin karfe, irin wannan ƙarfe gabaɗaya baya ƙunshi nickel, wani lokacin Hakanan yana ƙunshe da ƙaramin adadin Mo, Ti, Nb da sauran abubuwa. Irin wannan nau'in karfe yana da halaye na babban zafin jiki na thermal, ƙananan haɓaka haɓakawa, kyakkyawan juriya na iskar shaka, da kyakkyawan juriya na lalata. Ana amfani da shi mafi yawa don samar da juriya na yanayi, tururin ruwa, ruwa da oxidizing acid. Rushewar sassa. Koyaya, kaddarorin injina da aikin aiwatarwa ba su da kyau, kuma galibi ana amfani da su a cikin sifofin juriya na acid tare da ɗan damuwa kuma azaman ƙarfe na anti-oxidation. Hakanan yana iya samar da sassan da ke aiki a yanayin zafi mai zafi, kamar sassan injin turbin gas.