Saky steel 440 usoro ntụgharị berances igwe anaghị agba nchara & detuo 440a, 440B, 440c
AISI 440A, enweghị S44002, Jis Sus440a, w.-nr. 1.4109 (din x70crmo15) Browts ígwè, efere, ọkụ
AISI 440B, enweghị S44003, Jis sus440b, w.-nr. 1.4112 (Dan X90crmov18) Browts ígwè, efere, ọkụ
AISI 440C, na-enweghị isi S44004, Jis Sus440c, w.-inr. 1.4125 (din x1055crmo17) Browts ígwè, efere, ọkụ
440a 440B 440c 440c (
| Greedi | C | Si | Mn | S | P | Cr | Ni | Mo |
| 440a | 0.60 ~ 0.75 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00 ~ 18.00 | - | ≤0.75 |
| 440B | 0.85 ~ 0.95 | ≤1 | ≤1 | ≤0.030 | ≤0.035 | 16.00 ~ 18.00 | ≤0.60 | ≤0.75 |
| 440C | 0.95 - 1.20 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00 ~ 18.00 | - | ≤0.75 |
Ihe odide carbon na ihe siri ike nke 440a-440B-440c mụbara nke ọma site na ABC (A-0.9%, C.9%, C-1.2%). Na 440c bụ ezigbo mma igwe anaghị agba nchara na-enweghị isi na 56-58 RC. Thelọ atọ ndị a nwere ezigbo nchara nchara, 440a kacha mma, na 440c bụ nke kachasị ala. Ndị 440c bụ ihe a na-ahụkarị. Ihe mejupụtara kemịkalụ nke ọrịa na-enweghị igwe anaghị agba nchara dị ka molybium, Tradium dabere na ngwakọta nke 0.1% C na 12% -27% cr. Ebe ọ bụ na ihe owuwu anụ ahụ bụ usoro cubic nke nwere ahụ, ike na-ada n'ike na oke okpomọkụ. N'okpuru 600 Celsius C, ike okpomoku dị elu bụ nke kachasị elu n'etiti ụdị igwe anaghị agba nchara, na ike na-emekwa ka ọ dị elu. 440a enwewo ezigbo ihe na-edozi ahụ na nke na-eme mkpọtụ na ịdị elu dị elu. Ọ nwere ike dị elu karịa 440b steel na 440c steel. A na-eji 440B iji belata ngwaọrụ, ngwa ọrụ na valvs. Ọ nwere ike dị elu karịa 440a steel na ịdị elu karịa 440c steel. Na 440c nwere ihe siri ike nke igwe anaghị agba nchara na igwe na-eguzogide mmiri ma na-eji ya maka nozzles na ihe. 440F bụ ọkwa nchara nke na-eme ka ihe ndị dị mfe nke 440C steel maka akpaka.
Oge Post: August-17-2018