Daraja:20 karfe
Daidaito:GB/T 699-1999

halaye
Ƙarfin yana da ɗan girma fiye da 15 karfe, da wuya quenching, babu fushi brittleness sanyi nakasawa plasticity high general for lankwasawa calender flanging da guduma aiki, kamar baka baka waldi da juriya waldi mai kyau waldi yi, waldi lokacin da kauri ne kananan, m bayyanar ko siffar hadaddun sassa masu saurin fashewa akan yankan machining yanayin sanyi da aka zana ko daidaita yanayin annealing mai kyau gabaɗaya ana amfani da shi wajen kera ƙarfi ba babba kuma tauri
The karfe nasa ne high quality low-carbon carbon karfe, sanyi extrusion carburized hardening karfe, da karfe yana da low ƙarfi, mai kyau tauri, plasticity da weldability, tensile ƙarfi na 355-500mpa, elongation kudi na 24%
Normalizing na iya inganta spheroidization na karfe, tace babban toshe proeutectoid ferrite, da kuma inganta yankan aikin blanks kasa da 160HBS.
Hanyar fasaha takarfemutu sassa ne: da simintin ƙirƙira mutu blank annealing inji m machining sanyi extrusion gyare-gyaren recrystallization annealing inji lafiya machining carburizing quenching tempering nika polishing taro.

sinadaran abun da ke ciki
C: 0.17% ~ 0.24%
Si: 0.17% ~ 0.37%
Mn: 0.35% ~ 0.65%
S: 0.035%
P: 0.035%
C: 0.25%
Ni: 0.25%
ku: 0.25
kayan inji
Ƙarfin ƙarfin ƙarfi B (MPa): ≥410(42)
Ƙarfin Haɓaka S (MPa): ≥245(25)
Tsawaitawa 5 (%): ≥25
Rage raguwar yanki (%) : 55 ko fiye
Taurin: ba a kula da zafi ba, ≤156HB
Girman samfurin: Girman samfurin: 25mm

sauran bayanai

Heat magani bayani dalla-dalla: normalizing,910 ℃, iska sanyaya.

Tsarin Metallographic: ferrite + pearlite.
Maganin zafina karfe 20 da quenching taurin karfe No. 20:
Maganin zafi na karfe 20: Don karfe 20, yana yiwuwa a cimma taurin ƙushewa na yau da kullun na 30-35HRC.Saboda zafin zafi ya fi girma, nakasar quenching ya fi girma. Duba:
1. Bayan m machining, da workpiece ne quenched a matsayin dukan da zafi magani (920 ℃ quenched brine), sa'an nan kuma sarrafa.Due ga taurin bukatun na 30-35HRC, duk matakai ya kamata su iya aiwatar, kome fiye da lafiya ciki. kuma a wajen da'irar mota, gyara keyway.
2. Same m machining, ciki rami surface quenching ko kawai tebur quenching keyway (dangane da girman da workpiece), kuma a karshe gama.
3. Carburizing da quenching, nika ramin ciki da keyway.
Tsarin tsari shine na biyu, na uku kuma mafi yawa.
● Yanayin bayarwa: bayarwa a cikin yanayin rashin magani mai zafi ko zafi mai zafi (annealing, normalizing ko high zafin jiki zafin jiki) .Ya kamata a nuna bayarwa a cikin yanayin maganin zafi a cikin kwangilar. Idan ba a nuna ba, za a yi isar da shi ba tare da shi bazafi magani.