Ukuhlaziywa kwezakhiwo kanye nokwakheka kwamakhemikhali kwepayipi lensimbi engenamthungo elidonsa ngokubanda elidonsa ngamakhaza elingu-20CrMnTi

Insimbi engu-20CrMnTi ibizwa ngensimbi yegiya, kanti izingxenye eziningi zisebenzisa i-20CrMnTi.

20CrMnTiipayipi lensimbi engenamthungozingahlukaniswa zibe izinhlobo ezintathu: kubanda-drawn, hot-rolling futhiipayipi lensimbi elingenamthungo elibandayo eligoqiwe, enezidingo ezahlukene kanye nezinqubo ezahlukene.Nokho, amanye amayunithi asebenzisa insimbi eyindilinga ukuze akhiqize izingxenye ngaphandle kokucabangela ukushintshwa kwamapayipi ensimbi.Ukushintsha ipayipi lensimbi engenamthungo elidonsa ngamakhaza elingu-20CrMnTi ngensimbi eyindilinga engu-20CrMbTi akulondolozi nje kuphela izinto ezingavuthiwe namahora okusebenza, kodwa futhi kunciphisa izindleko futhi kwenyusa ukuncintisana kwemakethe.I-20CrMnTi kanye ne-30CrMnSiA amapayipi ensimbi adonswa ngokubanda adonswa ngomthungo ayizinsimbi ezishisiwe ezisebenza kahle, ukuqina okuphezulu, indawo eqinile nengagugi kanye nomgogodla oqinile ngemva kokungcwatshwa nokucisha, ukuqina komthelela ophezulu wezinga lokushisa eliphansi, ukushisela okuphakathi, kanye nokusebenza kahle ngemva kokujwayelekile.20CrMnTiipayipi lensimbi elingenamthungo elidonswa ngamakhazangokuvamile insimbi ye-carbon ephansi ene-carbon content ka-0.17% - 0.24%.Isetshenziswa kakhulu ezimotweni ukwenza amagiya okudlulisa.Insimbi ye-carburized carbon steel eqinile, emaphakathi ne-CrMnTi, enokuqina okuphezulu.Ngaphansi kwesimo sokuqinisekisa ukuqina, inamandla aphezulu kanye nokuqina, ikakhulukazi ukuqina komthelela ophansi wokushisa okuphansi.20CrMnTi surface carburized kanye nensimbi eqinile.Ukusebenza kahle, ukuwohloka okuncane ekucutshungulweni okukhethekile, nokumelana nokukhathala okuhle.Inhloso: amagiya, amashafu, izingxenye zePiston, njll. asetshenziselwa izingxenye ezikhethekile zezimoto nezindiza.

I-20CrMnTi ejwayelekile: GB/T 3077-1988

Izimpawu kanye nobubanzi bokusetshenziswa kwe20CrMnTi ipayipi lensimbi engenamthungo elidonswa ngokubanda:

Isetshenziselwa ukwakha izingxenye ezibalulekile ezinengxenye engaphansi kuka-30mm ethwala isivinini esikhulu, umthwalo ophakathi nendawo noma osindayo, umthelela kanye nokungqubuzana, njengamagiya, amaringi egiya, izinhloko ze-shaft zegiya, njll.

Ukwakheka kwamakhemikhali kwepayipi lensimbi engenamthungo elidonswa ngokubanda elingu-20CrMnTi (amaphuzu):

Ikhabhoni C: 0.17 ~ 0.23

I-Silicon Si: 0.17 ~ 0.37

IManganese Mn: 0.80 ～ 1.10

I-Sulfur S: okuqukethwe okuyinsalela okuvumelekile ≤ 0.035

I-Phosphorus P: okuqukethwe okuyinsalela okuvumelekile ≤ 0.035

I-Chromium Cr: 1.00 ～ 1.3020CrMnTi ipayipi lensimbi engenamthungo elidonswa ngokubanda

I-Nickel Ni: okuqukethwe okuyinsalela okuvumelekile ≤ 0.030

I-Copper Cu: okuqukethwe okuyinsalela okuvumelekile ≤ 0.030

I-Titanium Ti: 0.04-0.10

Izakhiwo zikamshini zepayipi lensimbi elingenamthungo elidonswa ngokubanda elingu-20CrMnTi:

amandla e-tensile σ b (MPa):≥1080(110)

isivuno amandla σ (MPa):≥835(85)

Ubude δ 5 (％):≥10

Ukwehliswa kwendawo ψ (％):≥45

Impact energy Akv (J): ≥ 55

Inani lokuqina komthelela α kv (J/cm2):≥69(7)

Ukuqina: ≤ 217HB

Usayizi wesampula: usayizi wesampula ongenalutho ngu-15mm

Ukucaciswa kokwelashwa kokushisa kanye nesakhiwo se-metallographic sepayipi lensimbi engenamthungo elidonswa ngokubanda elingu-20CrMnTi:

Ukucaciswa kokwelashwa kokushisa: ukucisha: 880 ℃ okokuqala, 870 ℃ okwesibili, ukupholisa uwoyela;Ukushisa ku-200 ℃, ukupholisa amanzi nokupholisa umoya.

Ipayipi lensimbi engu-20crmnti iyinsimbi eqinile ephakathi, enokuqina okuhle ngenxa yokuhlanganiswa okuningi kwe-Cr, Mn kanye ne-Ti.Ububanzi obubalulekile bokucima uwoyela bungaba ngu-40mm;Ngemuva kwe-carburizing kanye nokucisha, inokumelana nokugqoka okuphezulu kanye nokuqina okuphezulu, ikakhulukazi ukushisa okuphansi komthelela wokuqina;Insimbi inenqubo enhle ye-carburizing, umkhuba wokukhula okusanhlamvu okuncane, ukucisha okuqondile kanye nokuguqulwa okuncane.Insimbi engu-20CrMnTi ingasetshenziswa ngokuyisisekelo ukukhiqiza izingxenye ezisindayo zensimbi ezinesigaba esingaphansi kuka-30 ℃, futhi ingamelana nesivinini esikhulu, umthwalo ophakathi nendawo noma umthwalo osindayo, umthelela nokungqubuzana, njengamagiya, amagiya amagiya, izindandatho zegiya, izindandatho eziphambanayo, izintambo zozipho. , izikelemu, njll.

Ukwakheka kwamakhemikhali kwepayipi lensimbi elingu-20crmnti kufaka i-carbon C, i-silicon Si, i-manganese Mn, isulfure S, i-phosphorus P ne-chromium Cr.Inqubo yokukhiqiza ipayipi lensimbi engu-20crmnti: i-carbon steel, i-finishing rolling, i-non-oxidation yokushisa okukhanyayo (i-NBK state), ukuhlolwa okungabhubhisi, ipayipi lensimbi udonga lwangaphakathi luxutshwe ngemishini ekhethekile futhi lugezwe ngaphansi kwengcindezi ephezulu, uwoyela wokulwa nokugqwala epayipini lensimbi zilashelwa ukuvimbela ukugqwala, futhi izembozo emikhawulweni yomibili yenzelwe ukuvimbela uthuli.Izici zepayipi lensimbi engu-20crmnti: izindonga zangaphakathi nezangaphandle zepayipi lensimbi zinokunemba okuphezulu nokuqeda okuphezulu, ipayipi lensimbi alinayo ungqimba lwe-oxide ngemuva kokwelashwa kokushisa, udonga lwangaphakathi lunokuhlanzeka okuphezulu, ipayipi lensimbi lithwala ukucindezela okukhulu, ukugoba okubandayo akukwenzi. deform, futhi ukunwetshwa kanye flattening abanayo imifantu.

I-Shandong Haihui Steel Co., Ltd. ikhiqiza amapayipi abandayo asongwe ngokunemba agqamile angenamthungoye-GB 10 #, GB20 #, GB35 #, GB45 #, 20Cr, 40Cr, 16Mn, 35CrMo, 20CrMoTi, Gcr15.