42CrMo inopisa yakakungurutswa simbi pepa/bar

42CrMo4 isimbi yekudzima nekudzikamisa, iyo ine musanganiswa wakanaka wesimba uye kusimba mumamiriro ekudzima uye kudziya. Mushure mekudzima mafuta, simbi ichave nekuomeswa kusvika ø60 mm bar dhayamita. Iyo microstructure yezviyero zvakakura haisi martensite yakazara. Simbi inoshandiswa pakuomesa induction. Kuoma kwepamusoro kuchapfuura min. 53 HRC. 42CrMo4 inogona kuunzwa M-yakarapwa kuitira kuti ikwidze machinability.

Kuumbwa Kwemakemikari
Steel Giredhi	C	Si	Mn	P	S	Cr	Mo	Cu
35CrMo	0.38～0.45%	0.17～0.37%	0.50～0.80%	≤0.035%	≤0.035%	0.90～1.20%	0.15～0.25%	≤0.30%

Mechanical properties

Goho simba σs/MPa (>=)	Kusimba simba σb/MPa (>=)	Elongation δ5/% (>=)	Kuderedzwa kwe nzvimbo ψ/% (>=)	Impact inotora simba Aku2/J (>=)	Kuoma HBS 100/3000 max
≥930(95)	≥1080(110)	≥12	≥45	≥78(8)	≤217HB

Kuti uwedzere hupenyu hwekufa kune dzinopfuura 800,000 dzinofa nguva, iyo pre-yakaomeswa simbi inogona kuomeswa nekudzima uye yakaderera tembiricha tempering. Paunenge uchidzima, preheat pa500-600 ℃ kwemaawa 2-4, uye wozoichengeta pa850-880 ℃ kweimwe nguva (inenge maawa maviri), wozoisa mumafuta uye inotonhorera kusvika 50-100 ℃ uye kutonhora kwemhepo, kuoma kunogona kusvika makumi mashanu mushure mekudzima -52HRC, kuitira kudzivirira kutsemuka, 200 ℃ yakaderera tembiricha tempering kurapwa kunofanira kuitwa nekukurumidza. Mushure mekupisa, kuoma kunogona kuchengetedzwa pamusoro pe48HRC.

42CrMo Steel Heat Treatment

Annealing

Kupinda mu760±10℃, muchoto kutonhora kusvika 400℃ ipapo kutonhora kwemhepo.

Normalizing

Normalizing mu760±10℃, kutonhora kwemhepo mushure mekubuda muchoto.

Zvinyorwa Nezve Kudzima uye Kupisa Kurapa

Inofanirwa kuterera kune tembiricha yemvura inotonhorera. Uye unofanirwa kuve nechokwadi kuti hapana kusvibiswa kwemafuta kana kumwe kusvibiswa. Kana zvisina kudaro, kuoma kwesimbi kuchave kusina kukwana kana kunze kwechiyero.

Kudzima uye kupisa kwebillet simbi zvinhu pasina kugadzirisa, zvino ichawana isina-uniform kuomarara. Saka kugadzirisa kwekugadzira kana kugaya kunodiwa pamberi peQ+T.