{"id":8937,"date":"2024-11-19T17:19:28","date_gmt":"2024-11-19T17:19:28","guid":{"rendered":"https:\/\/www.h-metal.ro\/blog\/?p=8937"},"modified":"2024-11-19T17:19:29","modified_gmt":"2024-11-19T17:19:29","slug":"acel-temperalasa","status":"publish","type":"post","link":"https:\/\/www.h-metal.ro\/blog\/hu\/acel-temperalasa\/","title":{"rendered":"Ac\u00e9l megereszt\u00e9se"},"content":{"rendered":"<p>Az ac\u00e9l <strong>temper\u00e1l\u00e1sa<\/strong> egy h\u0151kezel\u00e9s, amely abb\u00f3l \u00e1ll, hogy a f\u00e1zis\u00e1talakul\u00e1sok h\u0151m\u00e9rs\u00e9klete f\u00f6l\u00e9 <strong>hev\u00edtj\u00fck<\/strong>, ezen a h\u0151m\u00e9rs\u00e9kleten tartjuk az \u00f6sszes f\u00e1zis\u00e1talak\u00edt\u00e1s befejez\u00e9s\u00e9hez, \u00e9s nagy sebess\u00e9ggel <strong>h\u0171tj\u00fck<\/strong>.<\/p>\n\n\n\n<p>Az olt\u00f3kezel\u00e9sben a h\u0171t\u00e9si sebess\u00e9gt\u00e9nyez\u0151 mellett az \u00f6tv\u00f6z\u0151 elemek is fontos szerepet j\u00e1tszanak: nikkel, kr\u00f3m, molibd\u00e9n, szil\u00edcium, volfr\u00e1m, van\u00e1dium.<\/p>\n\n\n\n<p>Ezt az elj\u00e1r\u00e1st a k\u00edv\u00e1nt fizikai-k\u00e9miai tulajdons\u00e1gok el\u00e9r\u00e9se \u00e9rdek\u00e9ben hajtj\u00e1k v\u00e9gre: <strong>nagy kem\u00e9nys\u00e9g<\/strong> vagy kop\u00e1s\u00e1ll\u00f3s\u00e1g.<\/p>\n\n\n\n<p>A temper\u00e1l\u00e1s f\u0171t\u00e9si h\u0151m\u00e9rs\u00e9klet\u00e9t att\u00f3l f\u00fcgg\u0151en v\u00e1lasztj\u00e1k meg, hogy az \u00f6sszetev\u0151ket oldatba kell helyezni.<\/p>\n\n\n\n<p>A h\u0171t\u00e9s az adott ac\u00e9l kritikus temper\u00e1l\u00e1si sebess\u00e9g\u00e9n\u00e9l nagyobb sebess\u00e9ggel t\u00f6rt\u00e9nik. Ennek a szerkezetnek az el\u00e9r\u00e9se \u00e9rdek\u00e9ben a sz\u00e9nac\u00e9lokat \u00e9s az \u00f6tv\u00f6z\u00f6tt ac\u00e9lokat, amelyekben a sz\u00e9n meghaladja a 0,15-0,20%-ot, temper\u00e1lj\u00e1k.<\/p>\n\n\n\n<p>A sz\u00e9ntartalom befoly\u00e1solja a temper\u00e1l\u00e1si h\u0151m\u00e9rs\u00e9kletet. Annak az id\u0151tartamnak, amely alatt az <a href=\"https:\/\/www.metal-online.ro\/diferite-tipuri-de-oteluri-81.html\">ac\u00e9ldarabot <\/a>megereszt\u00e9si h\u0151m\u00e9rs\u00e9kletnek vetik al\u00e1, el\u00e9g magasnak kell lennie ahhoz, hogy el\u0151seg\u00edtse az ausztenitben l\u00e9v\u0151 sz\u00e9n teljes felold\u00f3d\u00e1s\u00e1t.<\/p>\n\n\n\n<h2>H\u0171t\u0151k\u00f6zeg ac\u00e9l temper\u00e1l\u00e1sa <\/h2>\n\n\n\n<p>A temper\u00e1l\u00e1s \u00fagy t\u00f6rt\u00e9nik, hogy a f\u00e9mt\u00e1rgyat k\u00fcl\u00f6nb\u00f6z\u0151 h\u0171t\u0151k\u00f6zegekbe mer\u00edtik:<\/p>\n\n\n\n<p>&#8211; v\u00edz \u00e9s vizes oldatok, amelyek vagy hat\u00f3anyagokat (n\u00e1trium-klorid, n\u00e1trium-hidroxid), vagy h\u0171t\u0151teljes\u00edtm\u00e9nyt cs\u00f6kkent\u0151 anyagokat (szilik\u00e1tok, glicerin) tartalmaznak;<\/p>\n\n\n\n<p>&#8211; n\u00f6v\u00e9nyi vagy \u00e1sv\u00e1nyi olajok;<\/p>\n\n\n\n<p>&#8211; s\u00f3- vagy olvadt f\u00e9mf\u00fcrd\u0151, el\u0151\u00edrt h\u0151m\u00e9rs\u00e9kletre meleg\u00edtve;<\/p>\n\n\n\n<p>&#8211; g\u00e1zok (\u00e1ltal\u00e1ban leveg\u0151, kiv\u00e9telesen hidrog\u00e9n).<\/p>\n\n\n\n<p>A k\u00f6rnyezetet az ac\u00e9l \u00f6sszet\u00e9tel\u00e9nek megfelel\u0151en v\u00e1lasztj\u00e1k ki. Megjegyzend\u0151, hogy bizonyos ac\u00e9lok semmilyen k\u00f6rnyezetben nem engedik az edz\u00e9st, fenn\u00e1ll annak a vesz\u00e9lye, hogy nem \u00e9rik el a k\u00edv\u00e1nt kem\u00e9nys\u00e9get, mert vagy t\u00fal gyorsan, vagy nem el\u00e9g gyorsan h\u0171lnek le.<\/p>\n\n\n\n<p>Az ac\u00e9l temper\u00e1l\u00f3 k\u00f6zeg\u00e9nek k\u00e9t f\u0151 k\u00f6vetelm\u00e9nynek kell megfelelnie:<\/p>\n\n\n\n<p>1. El\u0151seg\u00edteni a temper\u00e1l\u00e1s min\u00e9l m\u00e9lyebb behatol\u00e1s\u00e1t az alkatr\u00e9szen bel\u00fcl, lehet\u0151s\u00e9g szerint a teljes szakasz\u00e1n.<\/p>\n\n\n\n<p>2. A temper\u00e1l\u00e1si folyamat sor\u00e1n nem l\u00e9phet fel olyan bels\u0151 fesz\u00fclts\u00e9g, amely a term\u00e9k deform\u00e1l\u00f3d\u00e1s\u00e1hoz vagy reped\u00e9s\u00e9hez vezethet.<\/p>\n\n\n\n<h3>Az ac\u00e9l temper\u00e1l\u00e1s t\u00edpusai<\/h3>\n\n\n\n<p><em>Klasszikus temper\u00e1l\u00e1s: egy k\u00f6rnyezetben<\/em><\/p>\n\n\n\n<p>Ez abb\u00f3l \u00e1ll, hogy a term\u00e9ket egyetlen k\u00f6zegben h\u0171tik le, amely lehet v\u00edz, olaj vagy ak\u00e1r leveg\u0151. A felmeleg\u00edtett darabot addig mer\u00edtj\u00fck a foly\u00e9kony h\u0171t\u0151k\u00f6zegbe, am\u00edg teljesen ki nem h\u0171l.<\/p>\n\n\n\n<p>Az 5 mm-n\u00e9l nagyobb keresztmetszet\u0171 sz\u00e9nac\u00e9l alkatr\u00e9szekn\u00e9l a leggyakrabban haszn\u00e1lt k\u00f6zeg a v\u00edz. M\u00edg az 5 mm-n\u00e9l kisebb keresztmetszet\u0171 vagy \u00f6tv\u00f6z\u00f6tt ac\u00e9lb\u00f3l k\u00e9sz\u00fclt alkatr\u00e9szek eset\u00e9ben a haszn\u00e1lt k\u00f6zeg olaj.<\/p>\n\n\n\n<p>H\u00e1tr\u00e1nyok: termikus ig\u00e9nybev\u00e9telek (k\u00fcl\u00f6nb\u00f6z\u0151 szelv\u00e9ny\u0171 ter\u00fcletek k\u00f6z\u00f6tt) szerkezeti (maxim\u00e1lis t\u00e9rfogat\u00fa a martenzit).<\/p>\n\n\n\n<p>Speci\u00e1lis temper\u00e1l\u00e1si elj\u00e1r\u00e1sok: a klasszikus temper\u00e1l\u00e1s h\u00e1tr\u00e1nyainak (r\u00e9szleges) kik\u00fcsz\u00f6b\u00f6l\u00e9s\u00e9re<\/p>\n\n\n\n<p><em>Megszak\u00edtott olt\u00e1s (2 k\u00f6zeg: v\u00edz \u2013 olaj)<\/em><\/p>\n\n\n\n<p>A bels\u0151 fesz\u00fclts\u00e9gek cs\u00f6kkent\u00e9se \u00e9rdek\u00e9ben a temper\u00e1l\u00e1st k\u00e9t k\u00f6rnyezetben alkalmazz\u00e1k. A darabot el\u0151sz\u00f6r v\u00edzben 300-400 C-ra, majd olajban k\u00f6rnyezeti h\u0151m\u00e9rs\u00e9kletre h\u0171tj\u00fck.<\/p>\n\n\n\n<p>Ac\u00e9l <strong>temper\u00e1l\u00e1sa<\/strong>  l\u00e9p\u00e9sekben (karbantart\u00e1s a h\u0151m\u00e9rs\u00e9klet kiegyenl\u00edt\u00e9se \u00e9rdek\u00e9ben)<\/p>\n\n\n\n<p>Ezzel a m\u00f3dszerrel az alkatr\u00e9szt az Ms martenzites \u00e1talakul\u00e1si h\u0151m\u00e9rs\u00e9kletn\u00e9l valamivel magasabb h\u0151m\u00e9rs\u00e9klet\u0171 (30-50 C-kal) s\u00f3f\u00fcrd\u0151ben gyorsan leh\u0171tj\u00fck, ezen a h\u0151m\u00e9rs\u00e9kleten tartva mindaddig, am\u00edg a h\u0151m\u00e9rs\u00e9klet egyenletess\u00e9 nem v\u00e1lik az alkatr\u00e9sz teljes szakasz\u00e1n \u00e9s a v\u00e9gs\u0151 h\u0171t\u00e9s leveg\u0151n.<\/p>\n\n\n\n<p>A martenzites \u00e1talakul\u00e1s lass\u00fa sebess\u00e9ggel, leveg\u0151ben megy v\u00e9gbe, ami az alkatr\u00e9sz bels\u0151 fesz\u00fclts\u00e9geinek er\u0151teljes cs\u00f6kken\u00e9s\u00e9hez vezet.<\/p>\n\n\n\n<p><em>Izoterm temper\u00e1l\u00e1s (bainites szerkezet el\u00e9r\u00e9s\u00e9hez)<\/em><\/p>\n\n\n\n<p>Az ac\u00e9lt az ausztenit izoterm \u00e1talakul\u00e1s\u00e1nak v\u00e9g\u00e9ig a f\u00fcrd\u0151ben tartj\u00e1k.<\/p>\n\n\n\n<p>A s\u00f3f\u00fcrd\u0151 h\u0151m\u00e9rs\u00e9klete \u00e1ltal\u00e1ban 250-350 C. Az izoterm temper\u00e1l\u00e1s eredm\u00e9nyek\u00e9nt 45-55 HRC kem\u00e9nys\u00e9g\u0171, a plaszticit\u00e1st \u00e9s a sz\u00edv\u00f3ss\u00e1got magas \u00e9rt\u00e9keken tart\u00f3 bainites szerkezetet kapunk.<\/p>\n\n\n\n<p>A karbantart\u00e1s id\u0151tartam\u00e1t az ausztenit izoterm \u00e1talakul\u00e1si diagramok seg\u00edts\u00e9g\u00e9vel hat\u00e1rozzuk meg.<\/p>\n\n\n\n<p>Egyes \u00f6tv\u00f6z\u00f6tt ac\u00e9lokb\u00f3l vagy egyes szersz\u00e1mac\u00e9lokb\u00f3l k\u00e9sz\u00fclt v\u00e9kony alkatr\u00e9szekre alkalmazz\u00e1k.<\/p>\n\n\n\n<p><em>Fel\u00fcletes temper\u00e1l\u00e1s<\/em><\/p>\n\n\n\n<p>Csak a megkem\u00e9nyedett \u00e9s ellen\u00e1ll\u00f3 r\u00e9szek k\u00fclsej\u00e9re; a bels\u0151 t\u00e9r sz\u00edv\u00f3s marad.<\/p>\n\n\n\n<h4>Az edzhet\u0151s\u00e9g az ac\u00e9l azon tulajdons\u00e1ga, hogy m\u00e9lyen edzett, \u00e9s k\u00e9t dimenzi\u00f3 jellemzi:<\/h4>\n\n\n\n<p><strong>1.<\/strong> A megereszt\u00e9ssel el\u00e9rhet\u0151 maxim\u00e1lis kem\u00e9nys\u00e9ggel kifejezett megereszt\u00e9si kapacit\u00e1s az adott \u00f6tv\u00f6zet eset\u00e9ben.<\/p>\n\n\n\n<p><strong>2.<\/strong> A temper\u00e1l\u00e1s m\u00e9lys\u00e9ge, amely az anyag azon k\u00e9pess\u00e9g\u00e9t jelenti, hogy bizonyos m\u00e9lys\u00e9gben martenzites vagy f\u00e9lmartenzites szerkezet\u0171 temper\u00e1lt r\u00e9teget k\u00e9pez.<\/p>\n\n\n\n<p>&nbsp;Az edzhet\u0151s\u00e9g az ac\u00e9l \u00f6sszet\u00e9tel\u00e9t\u0151l, a megereszt\u00e9shez sz\u00fcks\u00e9ges hev\u00edt\u00e9si h\u0151m\u00e9rs\u00e9klett\u0151l \u00e9s az edz\u00e9si k\u00f6rnyezett\u0151l f\u00fcgg.<\/p>\n\n\n\n<p>Az optim\u00e1lis temper\u00e1l\u00e1si szerkezetet mind az alkalmazott elj\u00e1r\u00e1sok, mind a f\u0171t\u0151- \u00e9s h\u0171t\u0151k\u00f6zeg, mind az id\u0151tartam, a sebess\u00e9g, a f\u0171t\u00e9si h\u0151m\u00e9rs\u00e9klet \u00e9s a h\u0171t\u00e9si sebess\u00e9g befoly\u00e1solja.<\/p>\n\n\n\n<p>A megereszt\u00e9s ut\u00e1ni legnagyobb kem\u00e9nys\u00e9get a legmagasabb sz\u00e9ntartalm\u00fa ac\u00e9l \u00e9ri el.<\/p>\n\n\n\n<p>Mivel az edzett ac\u00e9l t\u00f6r\u00e9kenny\u00e9 v\u00e1lik, ez\u00e9rt temper\u00e1l\u00f3 kezel\u00e9st kell alkalmazni, k\u00fcl\u00f6nben kem\u00e9ny ac\u00e9ldarabunk van, de ugyanakkor nagyon t\u00f6r\u00e9keny.<\/p>\n\n\n\n<p><strong>Hasonl\u00f3 cikkek:<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/www.h-metal.ro\/blog\/hu\/az-acel-tortenete\/\">Az ac\u00e9l t\u00f6rt\u00e9nete<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.h-metal.ro\/blog\/hu\/\">Ac\u00e9l hajl\u00e9konys\u00e1g<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.h-metal.ro\/blog\/hu\/milyen-a-csillapitott-acel\/\">Edzett ac\u00e9l<\/a><\/p>\n<div style=\"padding-bottom:20px; padding-top:10px;\" class=\"hupso-share-buttons\"><!-- Hupso Share Buttons - http:\/\/www.hupso.com\/share\/ --><a class=\"hupso_toolbar\" href=\"http:\/\/www.hupso.com\/share\/\"><img src=\"https:\/\/static.hupso.com\/share\/buttons\/share-medium.png\" style=\"border:0px; padding-top:5px; float:left;\" alt=\"Share\"\/><\/a><script type=\"text\/javascript\">var hupso_services_t=new Array(\"Twitter\",\"Facebook\",\"Google Plus\",\"Linkedin\",\"StumbleUpon\",\"Digg\",\"Reddit\",\"Bebo\",\"Delicious\"); var hupso_toolbar_size_t=\"medium\";var hupso_url_t=\"\";var hupso_title_t=\"Ac\u00e9l megereszt\u00e9se\";<\/script><script type=\"text\/javascript\" src=\"https:\/\/static.hupso.com\/share\/js\/share_toolbar.js\"><\/script><!-- Hupso Share Buttons --><\/div>","protected":false},"excerpt":{"rendered":"<p>Az ac\u00e9l temper\u00e1l\u00e1sa egy h\u0151kezel\u00e9s, amely abb\u00f3l \u00e1ll, hogy a f\u00e1zis\u00e1talakul\u00e1sok h\u0151m\u00e9rs\u00e9klete f\u00f6l\u00e9 hev\u00edtj\u00fck, ezen a h\u0151m\u00e9rs\u00e9kleten tartjuk az \u00f6sszes f\u00e1zis\u00e1talak\u00edt\u00e1s befejez\u00e9s\u00e9hez, \u00e9s nagy sebess\u00e9ggel h\u0171tj\u00fck. Az olt\u00f3kezel\u00e9sben a h\u0171t\u00e9si sebess\u00e9gt\u00e9nyez\u0151 mellett az \u00f6tv\u00f6z\u0151 elemek is fontos szerepet j\u00e1tszanak: nikkel, kr\u00f3m, molibd\u00e9n, szil\u00edcium, volfr\u00e1m, van\u00e1dium. Ezt az elj\u00e1r\u00e1st a k\u00edv\u00e1nt fizikai-k\u00e9miai tulajdons\u00e1gok el\u00e9r\u00e9se \u00e9rdek\u00e9ben hajtj\u00e1k [&hellip;]<\/p>\n<div style=\"padding-bottom:20px; padding-top:10px;\" class=\"hupso-share-buttons\"><!-- Hupso Share Buttons - http:\/\/www.hupso.com\/share\/ --><a class=\"hupso_toolbar\" href=\"http:\/\/www.hupso.com\/share\/\"><img src=\"https:\/\/static.hupso.com\/share\/buttons\/share-medium.png\" style=\"border:0px; padding-top:5px; float:left;\" alt=\"Share\"\/><\/a><script type=\"text\/javascript\">var hupso_services_t=new Array(\"Twitter\",\"Facebook\",\"Google Plus\",\"Linkedin\",\"StumbleUpon\",\"Digg\",\"Reddit\",\"Bebo\",\"Delicious\"); var hupso_toolbar_size_t=\"medium\";var hupso_url_t=\"\";var hupso_title_t=\"Ac\u00e9l megereszt\u00e9se\";<\/script><script type=\"text\/javascript\" src=\"https:\/\/static.hupso.com\/share\/js\/share_toolbar.js\"><\/script><!-- Hupso Share Buttons --><\/div>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[50],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.6 - 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