S355j2h m karfe bututu manufacturer garanti tallace-tallace

S355jo samfuri ne na ƙaƙƙarfan Turai mai zafi birgima tsarin ƙarfe.

S355jo yana aiwatar da ma'auni na en10025-2: 2004 (Tsohon ma'auni (en10025: 1990)
The quenching zafin jiki na low-zazzabi karfe bututu ne A3 + (30 ~ 50) ℃. A aikace, ana ɗaukar iyakar babba gabaɗaya. Higher quenching zafin jiki na iya hanzarta dumama gudun low-zazzabi karfe bututu, rage surface hadawan abu da iskar shaka da kuma inganta aiki yadda ya dace. Domin homogenize da austenite na workpiece, isasshen lokacin riƙe ake bukata. Idan ainihin loda tanderun yana da girma, lokacin riƙewa yana buƙatar tsawaita yadda ya kamata. In ba haka ba, rashin isasshen taurin na iya faruwa saboda rashin daidaituwar dumama. Duk da haka, idan lokacin riƙewa ya yi tsayi da yawa, rashin amfani da hatsi mai laushi da ƙananan ƙwayar oxidation zai bayyana, wanda zai shafi ingancin quenching. Mun yi imanin cewa idan adadin caji ya fi wanda aka ƙayyade a cikin takaddun tsari, lokacin dumama da riƙewa yana buƙatar ƙarawa ta 1/5.

Saboda hardenability na low-zazzabi karfe bututu ne low, 10% brine bayani tare da high sanyaya kudi za a yi amfani. Aikin aikin ya kamata a kashe shi sosai bayan shigar da ruwa, amma ba sanyi sosai ba. Idan 45 # daidaitaccen bututun ƙarfe yana sanyaya sosai a cikin ruwan gishiri, kayan aikin na iya fashe, wanda ke haifar da saurin canji na austenite zuwa martensite lokacin da aka sanyaya aikin aikin zuwa kusan 180 ℃, wanda ke haifar da damuwa mai yawa. Don haka, lokacin da bututun ƙarfe mai ƙarancin zafin jiki ya yi saurin sanyaya zuwa wannan yanki na zafin jiki, ya kamata a ɗauki hanyar sanyaya jinkirin. Tun da yanayin zafin ruwa mai fita yana da wahala a iya sarrafa shi, dole ne a sarrafa shi ta hanyar gwaninta. Lokacin da girgiza kayan aiki a cikin ruwa ya tsaya, ana iya sanyaya ruwa mai fitar da iska (sanyi mai ya fi kyau). Bugu da ƙari, aikin aikin ya kamata ya motsa maimakon a tsaye lokacin shigar da ruwa, kuma yin motsi akai-akai bisa ga lissafin aikin aikin. A tsaye sanyaya matsakaici da a tsaye workpiece kai ga m taurin da danniya, sakamakon babban nakasawa har ma da fatattaka na workpiece.

Ƙunƙarar ƙaƙƙarfan ƙaƙƙarfan bututun ƙarfe mai ƙarancin zafin jiki da aka kashe da sassa masu zafi yakamata su kai hrc56 ~ 59, kuma yuwuwar babban sashe yana ƙasa, amma kada ya zama ƙasa da hrc48. In ba haka ba, yana nufin cewa aikin ba a kashe gaba ɗaya ba, kuma tsarin sorbite ko ma ferrite na iya bayyana a cikin tsarin. Wannan tsarin har yanzu yana riƙe a cikin matrix ta hanyar tempering, wanda ba zai iya cimma manufar quenching da tempering ba.

Domin high-zazzabi tempering na low-zazzabi karfe bututu bayan quenching, da dumama zafin jiki ne yawanci 560 ~ 600 ℃, da taurin da ake bukata ne hrc22 ~ 34. Domin manufar quenching da tempering ne don samun m inji Properties, da taurin. kewayon yana da faɗi da faɗi. Koyaya, idan zane yana da buƙatun tauri, za'a daidaita zafin zafin jiki gwargwadon buƙatun zane don tabbatar da taurin. Misali, wasu bututun ƙarfe masu ƙarancin zafin jiki suna buƙatar ƙarfi da ƙarfi da ƙarfi; Ga wasu gears da sassan shaft tare da maɓalli, buƙatun taurin sun yi ƙasa kaɗan saboda dole ne a niƙa su kuma a saka su bayan quenching da zafin rai. A tempering rike lokaci ya dogara da taurin bukatun da girman workpiece. Mun yi imanin cewa taurin bayan zafin jiki ya dogara da yanayin zafin jiki kuma yana da alaƙa da lokacin zafi, amma dole ne a sake shiga. Gabaɗaya, lokacin riƙe zafin na'urar ya fi awa ɗaya.