Ikibanza cyo kugurisha 40Cr umuyoboro wibyuma byo gutunganya
40Cr umuyoboro wicyuma nubwoko bwicyuma kizengurutse gifite igice cyuzuye kandi ntaho gihuriye. Ikozwe mu miyoboro ikomeye irimo ubusa binyuze mu gutobora, hanyuma ikozwe mu gushyushya gushyushye, kuzunguruka gukonje cyangwa gushushanya imbeho. Ugereranije nicyuma kizengurutse hamwe nibindi byuma bikomeye, iyo imbaraga zunamye hamwe na torsional zingana, uburemere bwumuyoboro wibyuma biroroha, nubwoko bwicyuma cyubukungu.
Ukurikije GB / T 3077-2008: ibigize imiti (igice kinini,%) C 0.37 ~ 0.44, Si 0.17 ~ 0.37, Mn 0.50 ~ 0.80, cr0.80 ~ 1.10, Ni ≤ 0.30 properties Imiterere ya mashini]
Ingero yubusa (mm): 25
Ubushyuhe bwo kuzimya bwa mbere (℃): 850; Coolant: Amavuta
Ubushyuhe bwa kabiri bwo kuzimya ubushyuhe (℃): -
Ubushyuhe bwo gushyushya ubushyuhe (℃): 520; Coolant: amazi, amavuta
Imbaraga zingana (σ b / MPa): ≧ 980
Gutanga umusaruro (σ s / MPa): ≧ 785
Kurambura nyuma yo kuvunika (δ 5 /%): ≧ 9
Kugabanya agace (ψ /%): ≧ 45
Ingufu zo gukuramo ingaruka (aku2 / J): ≥ 47
Gukomera kwa Brinell (hbs100 / 3000) (ubushyuhe cyangwa ubushyuhe bwo hejuru): ≤ 207
Ibyiciro bisanzwe byibyuma bya GB mubushinwa ni 40Cr, DIN ibikoresho No 1.17035 / 1.7045, DIN 41Cr4 / 42gr4, en 18, BS 41Cr4, AFNOR 42c4, NF 38cr4 / 41Cr4, uni 41Cr4, NbN 42cr4, SS 2245 Amerika AISI / SAE .
(ugereranije) ACM = 780 ℃
Ubushyuhe 850 ~ 870 ℃, ubukana 179 ~ 229hb.
Ubushyuhe ni 740 ~ 760 ℃, igihe cyo gufata ni 4 ~ 6h, hanyuma ubushyuhe bukonja kugeza ≤ 600 ℃ ku gipimo cyo gukonja cya 5 ~ 10 ℃ / h.
Gukomera mbere yo kuvurwa ≤ 217hb, gukomera nyuma yo koroshya ≤ 163hb.
. (670 ± 10) . 550 ℃ yo gukonjesha ikirere. Gukomera nyuma yo kuvurwa ni 153hbs.
Kuzimya ubushyuhe 850 ℃ ± 10 ℃, gukonjesha amavuta; Ubushyuhe 520 ℃ ± 10 ℃, amazi, amavuta hamwe no gukonjesha ikirere.
Hagati ya karubone yahinduwe ibyuma, imitwe ikonje ipfa ibyuma. Icyuma gifite igiciro giciriritse kandi gutunganya byoroshye. Nyuma yo kuvura ubushyuhe bukwiye, irashobora kubona ubukana, plastike no kwambara birwanya. Ubusanzwe bushobora guteza imbere tissue spheroidisation no kunoza imikorere yo guca ubusa hamwe nuburemere buri munsi ya 160hb. Ugereranije kuri 550 ~ 570 ℃, ibyuma bifite imiterere myiza yubukanishi. Gukomera kwiki cyuma birenze icyuma 45. Irakwiriye kuvurwa hejuru yubuvuzi nko kuzimya inshuro nyinshi no kuzimya umuriro.
Nyuma yo kuzimya no gushyuha, iki cyuma gikoreshwa mugukora ibice byubukanishi bitwara umutwaro uciriritse n'umuvuduko wo hagati, nko kuyobora knuckle, igice cya kabiri cyinyuma yimodoka, ibikoresho, shitingi, inyo, umugozi wumugozi, amaboko hagati, nibindi kubikoresho byimashini; Nyuma yo kuzimya n'ubushyuhe bwo hagati, bikoreshwa mugukora ibice bitwara umutwaro mwinshi, ingaruka n'umuvuduko wo hagati, nk'ibikoresho, igiti kinini, rotor ya pompe yamavuta, kunyerera, umukufi, nibindi; Nyuma yo kuzimya n'ubushyuhe bwo hasi, ikoreshwa mugukora ibice bifite umutwaro uremereye, ingaruka nke, kwambara birwanya ubukana hamwe nubunini bukomeye butarenze 25mm kumurongo, nk'inyo, igiti kinini, igiti, umukufi, nibindi; Nyuma yo kuzimya no gutwarwa no kuzimya hejuru yumurongo mwinshi, bikoreshwa mugukora ibice bifite ubukana buringaniye kandi bikambara birwanya ingaruka zikomeye, nk'ibikoresho, amaboko, igiti, urufunguzo runini, igikonjo, uruziga, pin, guhuza inkoni, umugozi, ibinyomoro, inlet inlet, nibindi. Byongeye kandi, iki cyuma nacyo gikwiriye gukora ibice bitandukanye byoherejwe bivurwa na karubone, nka gare na shitingi bifite diameter nini hamwe nubushyuhe buke bwo hasi.
Bishyizwe hamwe, gukomera ≤ 207hb. 40Cr modulus ya elastike: modulus ya E (20 ℃) / MPA 200000 ~ 211700, moderi yogosha G (20 ℃) 80800
Kuzimya 40Cr
40Cr kuzimya, 850 ℃, gukonjesha amavuta; Gushyushya 520 ℃, gukonjesha amazi, gukonjesha amavuta. Ubuso bwo kuzimya hejuru ya 40Cr umuyoboro wibyuma ni hrc52-60, kandi kuzimya umuriro bishobora kugera kuri hrc48-55.
40Cr kuvura nitriding
40Cr ni ibyuma bya nitride, kandi ibiyigize bifasha nitride. 40Cr irashobora kubona ubukana bwo hejuru nyuma yo kuvura nitriding, kandi ubukana bwinshi nyuma yo kuvura nitriding burashobora kugera kuri hra72 ~ 78, ni ukuvuga hrc43 ~ 55. Inzira ya Nitriding inzira yumurimo: guhimba annealing imashini itoroshye yo kuzimya hamwe nubushyuhe bwo kurangiza gutunganya imihangayiko ikuraho gusya kwa nitriding kurangiza gusya cyangwa gusya. Kuberako igipimo cya nitride cyoroshye kandi cyoroshye, birasabwa kugira imiterere-yimbaraga zikomeye, bityo rero birakenewe ko hajyaho uburyo bwo kuzimya ubushyuhe no kubanza kubanza kubona ubushyuhe bwa sorbite no kunoza imiterere yubukorikori hamwe nubwiza bwa urwego rwa nitrid. Nitride yoroshye ikora nitriding, kandi nitride ya gaze ikoreshwa
40Cr gusudira
Mbere yo gusudira 40Cr, witondere ubushyuhe kugirango wirinde kuzimya imbere muri weld kubera ubushyuhe bwa matrix. Nibyiza kubisanzwe mbere yo gusudira.
Weldability ya 40Cr: biroroshye gutandukanya mugihe cyo korohereza ibintu kandi byunvikana kumeneka (ubwoko bwumuriro). Biroroshye kumeneka mu mwobo no guhuza igice muri weld mugihe cyo gusudira. Hamwe na karubone nyinshi, biroroshye kubona imiterere ikomeye (martensite) yunvikana cyane no gukonja mugihe gikonje vuba. Iyo igipimo cyo gukonjesha cya zone yubushyuhe ari kinini, biroroshye gukora bigoye kandi bigacika karubone ya martensite kandi igashyiramo akarere gashyuha.
1. Ubusanzwe gusudira bikorwa muburyo budasanzwe (busanzwe).
2. Uburyo bwo gusudira ntabwo bugarukira
3.Ubushyuhe bwo gushyuha burashobora kwiyongera muburyo bukwiye hamwe nimbaraga nini zumurongo. Mubisanzwe, ubushyuhe bwo gushyuha hamwe nubushyuhe bwo hagati burashobora kugenzurwa hagati ya 250 ~ 300 ℃.
4. Ibikoresho byo gusudira bigomba kwemeza ko ibigize ibyuma byabitswe ahanini bisa nkibyuma fatizo, nka j107-cr
5.Kuzimya no gushyushya ubushyuhe bigomba gukorwa mugihe cyo gusudira. Niba bigoye gukora imiti yo kuzimya no gutuza mugihe gikwiye, guhuza hagati cyangwa gufata ubushyuhe burenze ubushyuhe mbere yigihe runaka birashobora gukorwa kugirango hydrogène ikwirakwijwe kandi yoroshe imiterere. Kubicuruzwa bifite imiterere igoye hamwe na weld nyinshi, annealing intera irashobora gukorwa nyuma yo gusudira umubare runaka weld.
