Igwe anaghị agba nchara bụ ihe ndị dị elu nke nwere nguzogide corrosion dị elu ma e jiri ya tụnyere ígwè ndị ọzọ n'ihi ọnụnọ nke nnukwu chromium. Dabere na usoro kristal ha, a na-ekewa ha na ụdị atọ dị ka ferritic, austenitic, na martensitic steels. Otu ọzọ nke igwe anaghị agba nchara bụ mmiri ozuzo siri ike nchara. Ha bụ ngwakọta nke martensitic na austenitic steels.
Ọkwa 440C igwe anaghị agba nchara bụ nnukwu carbon martensitic igwe anaghị agba nchara. Ọ nwere ike dị elu, nguzogide corrosion na-agafeghị oke, yana ike siri ike na iyi nguzogide. Ọkwa 440C nwere ike nweta, mgbe ọgwụgwọ okpomọkụ gasịrị, ike kachasị elu, ike ike na iyi nguzogide nke alloys igwe anaghị agba nchara. Ọdịnaya carbon ya dị elu bụ maka njirimara ndị a, nke na-eme ka 440C dabara adaba maka ngwa ndị dị ka bọọlụ bọọlụ na akụkụ valvụ.
Ihe mejupụtara kemịkalụ nke igwe anaghị agba nchara 440C
Ọkwa 440C | ||
Efrata | Min. | Oke. |
Carbon | 0.95 | 1.20 |
Manganese | - | 1.00 |
Silikoni | - | 1.00 |
Phosphorus | - | 0.040 |
sọlfọ | - | 0.030 |
Chromium | 16.00 | 18.00 |
Molybdenum | - | 0.75 |
Ígwè | Nhazi |
Njirimara anụ ahụ maka ọkwa 440 igwe anaghị agba nchara
Ọkwa | Njupụta (kg/m3) | Modulus Elastic (GPa) | Ọnụọgụ ọnụọgụ nke Mgbasa ọkụ (mm/m/C) | Nrụpụta ọkụ (W/m.K) | Okpomọkụ akọwapụtara 0-100C (J/kg.K) |
Mgbochi ọkụ eletrik (nW.m) | |||
0-100C | 0-200C | 0-600C | na 100C | na 500C | |||||
440A/B/C | 7650 | 200 | 10.1 | 10.3 | 11.7 | 24.2 | - | 460 | 600 |
Nkọwa 440C metụtara
USA | Germany | Japan | Ọstrelia |
ASTM A276-98b 440C SAE 51440C AISI 440C UNS S44004 |
W.Nr 1.4125 X105CrMo17 | JIS G4303 SuS 440C | AS 2837-1986 440C |