Meel iib ah oo ah 40Cr tuubo bir ah oo lagu farsameeyo
40Cr Dhuumaha birta waa nooc ka mid ah birta wareegsan oo leh qayb godan oo aan lahayn kala goysyo ku wareegsan. Waxay ka samaysan tahay tuubo adag oo bannaan iyada oo dalool, ka dibna laga sameeyay duubitaan kulul, duubitaan qabow ama sawir qabow. Marka la barbardhigo birta wareegsan iyo birta kale ee adag, marka foorarsiga iyo xoogga torsional ay isku mid yihiin, miisaanka tuubada birta ayaa fudud, taas oo ah nooc ka mid ah birta qaybta dhaqaalaha.
Marka loo eego GB / T 3077-2008: Halabuurka kiimikaad (jajab tiro badan,%) C 0.37 ~ 0.44, Si 0.17 ~ 0.37, Mn 0.50 ~ 0.80, cr0.80 ~ 1.10, Ni ≤ 0.30【 Guryaha makaanikada]
Tusaalaha cabbirka bannaan (mm): 25
Heerkulka kulaylka ee deminta ugu horreysa (℃): 850; qaboojiye: Saliid
Heerkulka kuleylka labaad ee deminta (℃):
Heerkulka kuleylka kuleylka (℃): 520; qaboojiye: biyo, saliid
Xoog xajin (σ b/MPa): ≧980
Dhibicda wax-soo-saarka (σ s/MPa): ≧785
Kordhinta jabka ka dib (δ 5/%): ≧9
Dhimista aagga (ψ/%): ≧45
Tamar nuugista saamaynta (aku2/J): ≥ 47
adkaanta brinell (hbs100/3000) (la daboolay ama heerkul sarreeya): ≤ 207
The fasalada steel caadiga ah ee GB ee Shiinaha waa 40Cr, din No. wax 1.17035 / 1.7045, din 41Cr4 / 42gr4, en 18, BS 41Cr4, AFNOR 42c4, NF 38cr4 / 41Cr4, UNI 41Cr4, NbN 42cr4, SS 2245 American Aisi / SAE / ASTM Standard Steel No. 5140, Japanese JIS birta caadiga ah No. scr440 (H) / scr440, American AISI / SAE / ASTM Standard Steel No. 5140, ururka caalamiga ah ee Standardization ISO heerka steel No. 41Cr4.
(qiyaastii) ACM = 780 ℃
Heerkulka 850 ~ 870 ℃, adkaanta 179 ~ 229hbs.
Heerkulka waa 740 ~ 760 ℃, waqtiga haynta waa 4 ~ 6h, ka dibna heerkulka la qaboojiyey ilaa ≤ 600 ℃ heerka qaboojinta ee 5 ~ 10 ℃ / h.
Adag ka hor daawaynta ≤ 217hbs, adayg ka dib marka la jilciyo ≤ 163hbs.
(670 ± 10) ℃ × 2H, heerkulka kor u kaca foornada, (710 ± 10) ℃ × 2H, qabooji foornada, (670 ± 10) ℃ × 2H, heerkulka kor u foornada, (710 ± 10) ℃ × 2H, ka dibna hoos u dhig heerkulka foornada, (670 ± 10) ℃ × 2H, heerkulka kor u kaca foornada, (710 ± 10) ℃ × 2H, ku qabooji foornada 3 wareegyo, ka dibna qabooji ilaa 550 ℃ qaboojinta hawada. Adag daawaynta ka dib waa 153hbs.
Deminta heerkulka 850 ℃ ± 10 ℃, qaboojinta saliidda; Heerkulka heerkulka 520 ℃ ± 10 ℃, biyaha, saliidda iyo qaboojinta hawada.
Birta kaarboonka dhexdhexaadka ah ee dhexdhexaadka ah, birta dhinta madaxa qabow. Birtu waxay leedahay qiimo dhexdhexaad ah iyo habayn sahlan. Daawaynta kulaylka habboon ka dib, waxay heli kartaa xoogaa adag, caag iyo xidhid iska caabin ah. Caadiyan waxay kor u qaadi kartaa spheroidization nudaha waxayna wanaajisaa waxqabadka goynta meelaha bannaan ee engegnaanta ka yar 160hbs. Heerkulka 550 ~ 570 ℃, birta waxay leedahay sifooyinka farsamada ugu fiican. Adkeysiga birtan ayaa ka sarreeya tan 45 birta ah. Waxay ku habboon tahay daaweynta adkaynta dusha sare sida deminta soo noqnoqoshada badan iyo deminta ololka.
Daminta iyo dabcida ka dib, birtan waxaa loo isticmaalaa in lagu soo saaro qaybo farsamo oo xambaarsan culeys dhexdhexaad ah iyo xawaar dhexdhexaad ah, sida isteerinka isteerinka, usheeda dhexe ee baabuurta, marsho, usheeda dhexe, dirxiga, usheeda dhexe, gacanta dhexe, iwm on qalabka mashiinka; Daminta iyo heerkulka dhexdhexaadka ah ka dib, waxaa loo isticmaalaa in lagu soo saaro qaybo sidda culeys sare, saameyn iyo xawaare dhexdhexaad ah, sida gear, shaft main, rotor bamka saliidda, xannibaadda silbashada, collar, iwm; Ka dib marka la demiyo iyo heerkulka heerkulka hooseeya, waxaa loo isticmaalaa in lagu soo saaro qaybo leh culeys culus, saameyn hoose, xirashada caabbinta iyo dhumucdiisuna waxay ka yar tahay 25mm qaybta, sida dixirigga, usheeda dhexe, usheeda dhexe, collar, iwm; Ka dib deminta iyo xanaaqa iyo deminta dusha sare ee soo noqnoqda, waxaa loo isticmaalaa in lagu soo saaro qaybo leh qallafsanaan dusha sare leh oo xidho iska caabin ah oo aan saameyn weyn ku yeelan, sida qalabka, gacanta, shafka, shafka ugu weyn, shafka, dunta, biinanka, isku xirka usha, furka, lowska, waalka galitaanka, iwm. Intaa waxaa dheer, birtani waxay sidoo kale ku habboon tahay soo saarista qaybaha kala duwan ee gudbinta ee lagu daaweeyo karbonitriding, sida gears iyo shafts leh dhexroor weyn iyo heerkul hooseeya oo wanaagsan.
La daboolay, adkaanta ≤ 207hbs. 40Cr modules laastikada: elastic modules E (20 ℃) / MPA 200000 ~ 211700, xiirid modules G (20 ℃) 80800
Habka Deminta 40Cr
40Cr quenching, 850 ℃, saliid qaboojinta; Heerkulka 520 ℃, qaboojinta biyaha, qaboojinta saliidda. Adkeydka dusha sare ee tuubada birta ee 40Cr waa hrc52-60, deminta ololkuna wuxuu gaari karaa hrc48-55.
40Cr daaweynta nitriding
40Cr waxay ka tirsan tahay birta nitrided, iyo curiyayaasha ku jira waxay ku habboon yihiin nitriding. 40Cr waxay heli kartaa adkaanta dusha sare ka dib daawaynta nitriding ka dib, iyo adkaanta ugu sareysa ka dib daaweynta nitriding waxay gaari kartaa hra72 ~ 78, ie hrc43 ~ 55. Nitriding workpiece dariiqa: daminta mashiinada qallafsan ee deminta iyo dabci dhammaynta cadaadiska ka saarida shiida nitriding dhammayn shiidi ama shiidi. Sababtoo ah lakabka nitrided waa dhuuban oo jilicsan, waxaa loo baahan yahay in uu yeesho qaab dhismeed sare oo xoog leh, sidaas darteed waxaa lagama maarmaan ah in la sameeyo daweynta kuleylka kuleylka iyo kuleylka marka hore si loo helo sorbite xanaaqsan oo loo hagaajiyo sifooyinka farsamada ee asaasiga ah iyo tayada lakabka nitrided. Nitriding jilicsan waa nitriding firfircoon, iyo nitriding gaaska ayaa si caadi ah loo isticmaalaa
40Cr alxanka
Kahor alxanka 40Cr, fiiro gaar ah u yeelo kulaylka hore si aad uga hortagto deminta dildilaaca gudaha alxanka sababtoo ah kulaylka matrixka. Way fiicantahay in la iska caadiyeeyo ka hor alxanka.
Weldability of 40Cr: way fududahay in la kala saaro inta lagu jiro crystallization oo waxay u nugul tahay dildilaaca crystallization (nooc ka mid ah dildilaaca kulaylka). Way fududahay in la dildilaaciyo godka godka iyo qayb ka mid ah alxanka inta lagu jiro alxanka. Iyada oo ay ku jirto kaarboonka sarreeya, way fududahay in la helo qaab-dhismeed adag (martensite) kaas oo aad u xasaasi u ah dildilaaca qabow inta lagu jiro qaboojin degdeg ah. Marka heerka qaboojinta ee aagga aadka u kulul uu weyn yahay, way fududahay in la sameeyo karbon martensite adag oo jajaban oo la jeexjeexo aagga kulul.
1. Alxanka guud ahaan waxaa lagu fuliyaa xaalad la baab'iyay (caadiyan).
2. Habka alxanka ma xaddidna
3.Heerkulka kulaylka ka hor ayaa si habboon loogu kordhin karaa tamar toosan. Guud ahaan, heerkulka preheating iyo heerkulka interlayer waxaa lagu xakameyn karaa inta u dhaxaysa 250 ~ 300 ℃.
4. Qalabka alxanka waa inuu xaqiijiyaa in isku-dhafka birta la dhigay ay asal ahaan la mid tahay tan birta saldhigga ah, sida j107-cr
5.Deminta iyo daawaynta kulaylka waa in la sameeyaa wakhtiga alxanka ka dib. Haddii ay adagtahay in la sameeyo daawaynta deminta iyo dabciga wakhtiga, ka-buufinta dhexdhexaadka ah ama haynta heerkul ka sarreeya kulaylka hore ee wakhti ayaa la samayn karaa si loo baabi'iyo hydrogen fidsan oo loo jilciyo qaabdhismeedka. Alaabooyinka leh qaab-dhismeed adag iyo alxanka badan, jeexid dhexdhexaad ah ayaa la samayn karaa ka dib alxanka tiro cayiman
