Liphetoho ka har'a sebopeho sa maqhubu le thepa ea ho tšoarela nakong ea ha ho ne ho bata

Tšoarelokamora ho qhala, martensite le austenite e bolokiloeng e sa tsitsa, ba na le ts'ebetso ea phetoho ea mekhahlelo ho ea ho botsitso, joalo ka khomphutha e kaholimo ho ts'ebetso bakeng sa ho khothaletsa phetoho, joalo ka ha ho chesa moea ke mokhatlo o sa lekanang. ho lekola lits'ebetso tsa mokhatlo, ts'ebetso ena e itšetleha ka ho falla ha atomiki le phallo ea tumello ena hammoho le mocheso oa hau o felisitsoeng, lebelo la phapang e potlakileng; Ka lehlakoreng le leng, ka keketseho ea mocheso o fokang, sebopeho sa tšoarelo se tla fela. tlasa liphetoho tse ngata. Ho latela maemo a phetoho ea micostform, moea o fokang ka sekhahla o arotsoe ka mekhahlelo e mene: martensite decomposition, residual austenite decomposition, kholo ea ho bokellana ha carbide le prerrstallization ea ferrite.
Mokhahlelo oa pele (200)
(1) oa betloa ha theola mocheso oa mocheso oa mocheso oa mocheso oa mocheso oa mocheso oa 80, o tima tšepe ntle le phetoho ea mokhatlo oa Ming S, ketsahalo ea khabone ho martensite e sa lekanyetsoang, 'me ha ho qale ho senyeha ka moea o matla oa 80-200, martensite e qala. ho bata, ho theola monokotšoai o poteletseng haholo, fokotsa karolo ea boima ba martensite khokahanong ea khabone sethaleng sena, ka lebaka la mocheso o tlase oa mocheso, martensitic pula feela karolo ea liathomo tsa kh'abeche tse phahameng, ka hona e ntse e le khabone ka - Fe supersaturated solid solution phetisetso ea carbide e ntle haholo e tsamaisoa ka mokhoa o tšoanang ka har'a matrix a martensite. Sebopeho se tsoakiloeng sa low satellite Martensite le carbide e ntle haholo se bitsoa tempered Martensite.

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(2) ho theola mocheso mohatong oa bobeli (200-300), ho qepha hoa masale austenite ha thempereichara e phahama ho isa ho 200-300, ho bola hoa martensite ho ile ha tsoela pele, empa phetoho e matla ke ho saroloha hoa ts'oaetso ea masala e bile ka tšusumetso e setseng Ho atolosoa ha liathomo tsa khabone ho etsa sebaka se lekanang, ebe se kenngoa mokhatlong oa alpha le motsoako oa mokhatlo oa carbide, e leng ho reoa ha boima ba tšepe e sa pheleng ha ho hlakile ho fokotseha mohatong ona
(3) Karolo ea boraro (250-400) phetoho ea carbide ofging tempering e maemong ana a mocheso. Ka lebaka la mocheso o phahameng, bokhoni ba ho kopanya atomate ea Carbon bo matla ho feta, bokhoni ba ho kopanya liathomo tsa tšepe le bona, martensite decompate phetoho ea carbides ea pula le ho fifala hoa masale ho tla fetoloa cementite e tsitsitseng e nang le karohano le phetoho ea li-carbides, ho fokotseha ea martensite karolong ea khase e ngata, martensite lattice e kheloha, phetoho ea martensitic bakeng sa ferrite, fumana ferritic matrix phepelo kahare ho granular kapa samellar cementite ea mokhatlo, mokhatlo o bitsoang tempering ha e le hantle o felisitse karolo ena ea khatello e felisang khatello, ho ba thata, polasetiki e thata.

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(4) Mokhahlelo oa bone oa ho theola moea (& GT; 400) o ile oa hola carbide e bokelletsoeng le ho ts'oaroa ha ferrite ka lebaka la mocheso oa mocheso o phahame haholo, liathomo tsa khabone le tšepe li na le bokhoni bo matla ba ho eketseha, karolo ea boraro ea li-flakesite tsa samente e tla tsoelapele. spheroidizing le ho hola ho feta 500-600, alpha recrystallization etsahala butle-butle, lahleheloa ke ferrite morphology ea mantlha poleiti kapa lesela, 'me ba theha polygon lijo-thollo ho mokhatlo e le ferritic matrix granular carbides, sehlopha se bitsoang tempering sorbite tempered sorbite le thepa e ntle e phethahetseng ea mochini oa sekhechana le karohano e lateloang e tlosa khatello ea kelello.

(Ho tloha 168 ho theha net


Nako ea poso: Aug-05-2020

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