Saky Steel mepụtara 440 usoro siri ike nke a na-akpọ martensitic igwe anaghị agba nchara mpempe akwụkwọ & efere 440A, 440B, 440C
AISI 440A, UNS S44002, JIS SUS440A, W.-nr. 1.4109 (DIN X70CrMo15) mpempe akwụkwọ ígwè anaghị agba nchara, efere, na flat
AISI 440B, UNS S44003, JIS SUS440B, W.-nr. 1.4112 (DIN X90CrMoV18) mpempe akwụkwọ ígwè anaghị agba nchara, efere, na flat
AISI 440C, UNS S44004, JIS SUS440C, W.-nr. 1.4125 (DIN X105CrMo17) mpempe akwụkwọ ígwè anaghị agba nchara, efere, na flat
Ihe mejupụtara 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 | 0.85～0.95 | ≤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 siri ike nke 440A-440B-440C mụbara n'usoro site na ABC (A-0.75%, B-0.9%, C-1.2%). 440C bụ ezigbo ígwè anaghị agba nchara dị elu nke nwere ike siri ike nke 56-58 RC. Ígwè atọ a nwere ezigbo ike iguzogide nchara, 440A bụ nke kacha mma, 440C bụkwa nke kacha ala. 440C bụ ihe a na-ahụkarị. Ihe mejupụtara kemịkalụ nke ígwè anaghị agba nchara martensitic bụ mgbakwunye nke ihe ndị dị ka molybdenum, tungsten, vanadium, na niobium dabere na njikọta nke ihe dị iche iche nke 0.1%-1.0% C na 12%-27% Cr. Ebe ọ bụ na nhazi anụ ahụ bụ cubic nhazi nke ahụ, ike ya na-ada nke ọma na okpomọkụ dị elu. N'okpuru 600 ° C, ike okpomọkụ dị elu bụ nke kachasị elu n'etiti ụdị ígwè anaghị agba nchara niile, ike ịrị elu bụkwa nke kachasị elu. 440A nwere ezigbo ihe eji eme ka ihe sie ike ma sie ike, ọ na-esikwa ike nke ukwuu. O nwere ike karịa ígwè 440B na ígwè 440C. A na-eji 440B maka ngwaọrụ ịkpụ, ngwaọrụ nha, bearings na valvụ. O nwere ike karịa ígwè 440A, ike ya dịkwa elu karịa ígwè 440C. 440C nwere ike kachasị elu karịa ígwè anaghị agba nchara na ígwè na-eguzogide okpomọkụ, a na-ejikwa ya maka nozzles na bearings. 440F bụ ọkwa ígwè nke na-eme ka ihe dị mfe ịkpụ nke ígwè 440C maka lathes akpaka.
Oge ozi: Ọgọst-17-2018