42CrMo alloy simbi pombi inogadzira waranti yekutengesa
Chinangwa che42CrMo isina musono pombi yesimbi: iyo yakakosha simbi yebhiriji "42CrMo", iyo yakakosha simbi yemotokari girder "42CrMo", uye yakakosha simbi yekumanikidza ngarava "42CrMo". Rudzi urwu rwesimbi runonatsiridza michina yesimbi nekugadzirisa kabhoni yemukati (c). Saka, maererano nekabhoni yemukati, rudzi urwu rwesimbi runogona kukamurwa kuva: pasi kabhoni simbi - iyo kabhoni yemukati kazhinji isingasviki 0.25%, senge 10 uye 20 simbi; Medium kabhoni simbi - iyo kabhoni yemukati kazhinji iri pakati pe0.25 ~ 0.60%, senge 35 uye 45 simbi; Yakakwira kabhoni simbi - kabhoni yemukati kazhinji yakakura kupfuura 0.60%. Mhando iyi yesimbi haiwanzo shandiswa mukugadzira pombi dzesimbi. 42CrMo simbi isimbi yakasimba-yepamusoro-soro ine simba rakawanda uye kusimba, kuomarara kwakanaka, hapana kujeka kwekudzikisira, kukwirira kwekuneta uye kurwiswa kwakawanda mushure mekudzima nekudzikamisa kurapwa, uye yakanaka kuderera-tembiricha kukanganisa kuoma. 42CrMo simbi inokodzera kugadzira hombe uye yepakati-saizi epurasitiki mold inoda imwe simba uye kuoma. Kuoma: annealed, 147 ~ 241hb, 42CrMo
Kusimba kwesimba σ b (MPa): ≥1080(110)
Goho simba σ s (MPa): ≥930(95)
Elongation δ 5 (%): ≥12
Kuderedza nzvimbo ψ (%): ≥45
Impact simba Akv (J): ≥ 63
Impact kuomarara kukosha α kv (J/cm2): ≥78(8)
Kuoma: ≤ 217hb
Kuti uvandudze hupenyu hwesevhisi yekufa kune kanopfuura 800000 nguva, iyo nzira yekuomesa yekudzima uye yakaderera-tembiricha tembiricha inogona kushandiswa kune pre hardened simbi. Panguva yekudzima, ichave yakabikwa pa500-600 ℃ kwemaawa 2-4, yozochengetwa pa850-880 ℃ kweimwe nguva (inenge maawa maviri), yakanyoroveswa mumafuta kusvika 50-100 ℃ uye yakatonhodzwa nemhepo. Kuoma mushure mekudzima kunogona kusvika 50-52hrc. Kuti udzivise kutsemuka, ichadziya pa200 ℃ nekukurumidza. Mushure mekupisa, kuoma kunogona kuchengetedzwa pamusoro pe48hrc. Iyo yekusarerekera munyu yekugezera vanadization kurapwa maitiro e42CrMo simbi. Iyo carbide layer inogona kuwanikwa nekusarerekera munyu yekugezera vanadization kurapwa kwe42CrMo simbi.
1. Carbon vanadium compound, iyo carburized layer ine chimiro chakafanana, kuenderera kwakanaka uye compactness, yunifomu ukobvu, compact chimiro, yakakwirira microhardness uye yakakwirira kupfeka kuramba, uye kuoma kwepasi, kupfeka kuramba uye kuramba kwekunamatira kunovandudzwa zvakanyanya.
2.Iyo solubility yeVC mu austenite yakakwirira kupfuura iyo iri mu ferrite. Nekudzikira kwetembiricha, VC inonaya kubva kune ferrite, izvo zvinoita kuti alloy isimbise uye zviyo zvicheneswe, uye iyo komputa layer inoratidza kuoma kwepamusoro. 42CrMo simbi ndeyepamusoro kabhoni uye yakakwira chromium ledeburite simbi, ine yakakwira carbide content, inoverengera inosvika 20%, uye inowanzogoverwa zvisina kuenzana mubhandi kana network, nekusarura kwakakomba. Zvisinei, kurapa kwakajairwa kupisa kwakaoma kushandura kupatsanurwa kwecarbide, iyo inokanganisa zvakanyanya michina yesimbi uye hupenyu hwebasa hwefa. Chimiro uye saizi yecarbides zvakare ine simba guru pazvinhu zvesimbi. Kunyanya, hombe yakapinza makona carbides ine yakakura kupatsanura mhedzisiro pane simbi matrix uye kazhinji inova sosi yekuneta kuputsika. Naizvozvo, zvinodikanwa kugadzirisa kuumbwa kwesimbi yakakungurutswa, kupwanya zvizere eutectic carbides kuti iite yakanaka uye yakaenzana kugovaniswa, uye chimiro chefiber chinogovaniswa kutenderedza mhango kana isiri nzira, Kuti uvandudze iyo transverse mechanic properties yesimbi. .
Munguva yekugadzira, iyo billet ichagumburwa uye inotorwa kubva kumativi akasiyana-siyana kwenguva dzakawanda, uye yakaumbwa ne "maviri akareruka uye imwe inorema" nzira, kureva kuti, billet icharohwa zvishoma pakutanga kwekugadzira kudzivirira kuputsika. Inogona kurohwa zvakanyanya patembiricha yepakati ye980 ~ 1020 ℃ kuve nechokwadi chekupwanya kwecarbides. 42CrMo simbi haina kuumbwa, uye yakasimba mhinduro yakapetwa kaviri yekunatsa kurapwa inogamuchirwa, kureva, yechipiri preheating panenge 500 ℃ uye 800 ℃ uye yakasimba mhinduro kurapwa pa1100 ~ 1150 ℃, Kudzima nemafuta anopisa kana isothermal quenching, tembiricha yakanyanya kupisa pa750. ℃, kupisa pa960 ℃ mushure mekugadzira uye kupisa kwekupedzisira kurapwa mushure mekutonhodzwa kwemafuta kunogonawo kunatsa carbides, mipendero yakatenderera uye makona uye kunatsa zviyo.
