Saky Steel na-emepụta 440 usoro hardenable martensitic igwe anaghị agba nchara & efere 440A, 440B, 440C
AISI 440A, UNS S44002, JIS SUS440A, W.-nr. 1.4109 (DIN X70CrMo15) igwe anaghị agba nchara, efere, flats
AISI 440B, UNS S44003, JIS SUS440B, W.-nr. 1.4112 (DIN X90CrMoV18) igwe anaghị agba nchara, efere, flats
AISI 440C, UNS S44004, JIS SUS440C, W.-nr. 1.4125 (DIN X105CrMo17) igwe anaghị agba nchara, efere, flats
Akụkụ kemịkalụ 440A 440B 440C:
| Ọkwa | 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 ruo 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 |
Ọdịnaya carbon na ike nke 440A-440B-440C mụbara nke ọma site na ABC (A-0.75%, B-0.9%, C-1.2%). 440C bụ ezigbo igwe anaghị agba nchara dị elu nke nwere ike nke 56-58 RC. Nchara atọ ndị a nwere ezigbo nchara nchara, 440A kacha mma, na 440C bụ nke kacha ala. 440C bụ ihe a na-ahụkarị. Ihe mejupụtara kemịkalụ nke igwe anaghị agba nchara martensitic bụ mgbakwunye nke ihe ndị dị ka molybdenum, tungsten, vanadium, na niobium dabere na ngwakọta nke ihe dị iche iche nke 0.1% -1.0% C na 12% -27% Cr. Ebe ọ bụ na ihe owuwu anụ ahụ bụ usoro cubic nke dabere na ahụ, ike na-adaba nke ọma na okpomọkụ dị elu. N'okpuru 600 Celsius C, ike okpomọkụ dị elu bụ nke kachasị elu n'etiti ụdị igwe anaghị agba nchara, na ike na-akpụ akpụ bụkwa nke kachasị elu. 440A nwere ọmarịcha ihe na-emenyụ ọkụ na ịdị ike yana ike siri ike. Ọ nwere ike dị elu karịa ígwè 440B na ígwè 440C. A na-eji 440B maka ịkpụ ngwaọrụ, ngwaọrụ nha, bearings na valves. Ọ nwere ike ike karịa 440A ígwè na elu siri ike karịa 440C ígwè. 440C nwere isi ike kachasị elu nke igwe anaghị agba nchara na igwe anaghị ekpo ọkụ ma ejiri ya mee nozzles na bearings. 440F bụ ọkwa nchara na-eme ka ihe dị mfe ịkpụ nke ígwè 440C maka lathes akpaka.
Oge nzipu: Ọgọst-17-2018