40cr bututu mara nauyi

Takaitaccen Bayani:

Bayanin samarwa:

Outer diamita na karfe bututu 20-426

Karfe bututu bango kauri na 20-426

Daidaitaccen bututun ƙarfe:

Bisa ga ma'auni GB/T 3077-2008: sinadaran abun da ke ciki (mass juzu'i,%) C 0.37 ~ 0.44, Si 0.17 ~ 0.37, Mn 0.50 ~ 0.80, Cr0.80 ~ 1.10, Ni≤0.30.【 Kayan aikin injiniya】

Samfura mara girman (mm): 25

Maganin zafi:

Na farko quenching dumama zafin jiki (℃): 850;Coolant: mai

Na biyu quenching dumama zafin jiki (℃): -

Tempering dumama zafin jiki (℃): 520;Coolant: ruwa, mai

Ƙarfin ƙarfi (σb/MPa): ≧980

Matsayin Haɓakawa (σs/MPa): ≧785

Tsawaitawa bayan karya (δ5/%): ≧9

Rage ƙimar giciye (ψ/%): ≧45

Ayyukan shayar da tasiri (Aku2/J): ≧47

Brinell taurin (HBS100/3000) (annealing ko high-zazzabi yanayin zafi): ≦207