Abantu bavame ukucabanga ukuthi omayibuthe badonsa insimbi engagqwali ukuqinisekisa ikhwalithi kanye nobuqiniso bayo. Uma bengadonsi imikhiqizo engeyona eyomayibuthe, kubhekwa njengento enhle neyangempela; uma bedonsa omayibuthe, kubhekwa njengento engelona iqiniso. Eqinisweni, lena indlela yokuhlonza egxile kakhulu ohlangothini olulodwa, engenangqondo futhi engalungile.
Kunezinhlobo eziningi zensimbi engagqwali, ezingahlukaniswa ngezigaba eziningana ngokwesakhiwo sazo sokuhlelwa emazingeni okushisa egumbi:
1. Uhlobo lwe-Austenitic: njengo-304, 321, 316, 310, njll.;
2. Uhlobo lwe-Martensite noma lwe-ferrite: njengo-430, 420, 410, njll.;
I-Austenite ayinamandla okudonsa noma ayinamandla okudonsa, kuyilapho i-martensite noma i-ferrite inamandla okudonsa.
Iningi lensimbi engagqwali evame ukusetshenziselwa amashidi eshubhu okuhlobisa yizinto ze-austenitic 304. Ngokuvamile, ayinamagnetic noma ayinamandla kakhulu. Kodwa-ke, ngenxa yokuguquguquka kokwakheka kwamakhemikhali ngenxa yokuncibilikisa noma izimo zokucubungula ezahlukene, amandla omagnet nawo angase avele, kodwa lokhu akunakubhekwa njengokungekho emthethweni noma okungafaneleki, siyini isizathu?
Njengoba kushiwo ngenhla, i-austenite ayinamandla kagesi noma ayinamandla kagesi, kuyilapho i-martensite noma i-ferrite inamandla kagesi. Ngenxa yokuhlukaniswa kwezingxenye noma ukwelashwa kokushisa okungafanele ngesikhathi sokuncibilikisa, inani elincane le-martensite noma i-ferrite ensimbini engagqwali ye-austenitic 304 lizobangelwa. izicubu zomzimba. Ngale ndlela, insimbi engagqwali ye-304 izoba namandla kagesi abuthakathaka.
Ngaphezu kwalokho, ngemva kokusebenza ngokubandayo kwensimbi engagqwali engu-304, isakhiwo senhlangano sizoshintsha sibe yi-martensite. Lapho izinga lokuguquguquka kokusebenza okubandayo likhula, ukuguqulwa kwe-martensite kuyanda, futhi amandla okubutha ensimbi ayanda. Njengenani lenqwaba yemichilo yensimbi,ΦKukhiqizwa amapayipi angu-76. Akukho ukwenziwa okubonakalayo kwe-magnetic, futhiΦKukhiqizwa amapayipi angu-9.5. Ngenxa yokuthi ukuguqulwa kokugoba kukhulu, ukufakwa kukazibuthe kuzoba sobala kakhulu. Ukuguqulwa kweshubhu eliyisikwele elingunxande kukhulu kunokweshubhu eliyindilinga, ikakhulukazi ingxenye yekhoneni, ukuguqulwa kunamandla kakhulu futhi amandla okuzibutha asobala kakhulu.
Ukuze kuqedwe ngokuphelele amandla kazibuthe ensimbi engu-304 abangelwa yizizathu ezingenhla, isakhiwo se-austenite esizinzile singabuyiselwa ngokwelashwa kwesisombululo sokushisa okuphezulu, ngaleyo ndlela kuqedwe amandla kazibuthe.
Ngokukhethekile, kufanele kuphawulwe ukuthi amandla okuzibutha ensimbi engagqwali engu-304 ngenxa yezizathu ezingenhla awalingani namandla okuzibutha kwezinye izinto zensimbi engagqwali, njenge-430 kanye nensimbi yekhabhoni. Ngamanye amazwi, amandla okuzibutha ensimbi engu-304 ahlala ebonisa amandla okuzibutha abuthakathaka.
Lokhu kusitshela ukuthi uma insimbi engagqwali inobuthi obubuthakathaka noma ingenayo nhlobo i-magnetism, kufanele ikhonjwe njengezinto ezingu-304 noma ezingu-316; uma inobuthi obufanayo nensimbi yekhabhoni futhi ibonisa ubuthi obuqinile, kufanele ikhonjwe njengezinto ezingu-304.
Iqembu Lensimbi laseJindalaiSikisela ukuthi uma uthenga imikhiqizo yensimbi engagqwali, kufanele ukhethe imikhiqizo evela kubakhiqizi abadumile. Ungabi ngumuntu ohahayo ngamanani aphansi futhi qaphela ukuthi ungakhohliswa. I-Jindalai Steel Group iyimboni enkulu yensimbi engagqwali kanye nebhizinisi lokuhweba elihlanganisa ukuthengiswa kwepuleti lensimbi engagqwali ngobuningi, ukucubungula, ukugcina impahla kanye nokusatshalaliswa. Ithembele ekwethembeni nasekusizweni kozakwethu ekhaya nakwamanye amazwe, inkampani ikhule yaba enye yamabhizinisi amakhulu ahlanganisa ukukhiqizwa kanye nokuhweba embonini yensimbi engagqwali ngemuva kweminyaka engaphezu kweyishumi yentuthuko kanye nokukhula.
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Isikhathi sokuthunyelwe: Okthoba-27-2023
