20 # inopisa yakakungurutswa simbi pepa

(1) Hunhu Simbi ndeyemhando yepamusoro-yepasi-kabhoni simbi, inotonhora yakawedzera, yakasvibiswa uye yakaoma simbi. Simbi ine simba rakaderera, kusimba kwakanaka, plasticity uye weldability. Kusimba kwesimba ndeye 253-500MPa, uye kureba kuri ≥24%.
Zvimiro zvemakumi maviri zvakangofanana neaya esimbi gumi neshanu, asi simba racho rakakwira zvishoma. Zvishandiso: akakodzera kugadzirwa kwezvidiki uye zvepakati carburizing uye carbonitriding zvikamu zvisina kukosha pakuvaka mota, matirakita uye akajairwa muchina kugadzira, senge shangu dzehandbrake, lever shafts, gearbox kumhanya maforogo, transmission passive giya uye Camshafts pamatirakita, kuturika equalizer shafts, yakaenzana mukati nekunze bushings, nezvimwewo; inoshandiswa kugadzira zvikamu zvakasiyana-siyana zvemakina zvisina kusimbiswa asi zvinoda kuomarara zvakanyanya pasi pekupisa-kukungurutswa kana kwakajairwa mamiriro; mumichina inorema uye yepakati-yakakura kugadzira Medium, senge akafukidzwa kana akatsikirirwa tayi tsvimbo, cheni, simbi, maoko, masimbi, nezvimwewo kushanda mumidhiya isiri-corrosive nedzvinyiriro ye ≤6N/ square uye tembiricha ye ≤450℃; aishandiswa kugadzira michinjikwa panjanji, zvitima nemotokari Zvikamu zvakaita semisoro nemapiston.
Normalizing inogona kusimudzira spheroidization yesimbi, kunatsa hombe proeutectoid ferrite, uye kunatsiridza kucheka mashandiro eiyo blank isingasviki 160HBS.
Nzira yekugadzira mativi esimbi inofa ndeiyi: kuvharika → kufoira kufa isina chinhu → kuwedzeredza →makanika rough machining → inotonhora extrusion molding → recrystallization annealing → mechanical finishing → carburizing → kudzima, kupisa → kugaya nekupukuta → kuungana.
(2) Delivery state uye kuoma Kusapisa mamiriro, kuoma ≤156HBS.

Iyo kemikari inoumbwa yeyakajairwa JB/T 6057-92 simbi (chikamu chikamu, %).

Mechanical properties
(5) Phase shanduko tembiricha (yakaenzana kukosha) Ac1=735℃, Ac3=855℃, Ar3=835℃, Ar1=680℃
(6) Normalizing specification Tembiricha iri 920 ~ 950 ℃, uye choto mhepo yakatonhodzwa. Iko kuoma ndeye 131 ~ 156HBS.
(7) Tsanangudzo yekunyorovesa kurapwa kwechando chakatsikirirwa blanks Tembiricha i700 ~ 720 ℃, nguva yekubata i8 ~ 15h, uye chiyero chekutonhora i50 ~ 100 ℃ /h, uye tembiricha inodonha kusvika 550 ~ 600 ℃ nechoto, uye choto chinotonhodzwa nemhepo.
Kuomarara kusati kwaitwa ≤143HBS, uye kuomarara mushure mekunyorova ndiko ≤131HBS.
(8) Kudzima yakatarwa Tembiricha 910℃±10℃, kutonhora ne10% NaCl brine.
(9) Yakayerwa simba regoho fy=245Mpa, elastic modulus E=206Gpa, chiyero chePoisson ν=0.3.
(10) Simba rekugera i275 ~ 392MPa, simba rekusimba i253~500MPa, simba regoho i275MPa, uye kurebesa i25%.
(11) The annealing tembiricha inongova 600-650 madhigirii, uye nguva yekubata i1-2h.

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