ʻO ke kila kila ʻole Martensitic e pili ana i kahi ʻano kila kila nona ka microstructure he martensite. ʻO ka chromium maʻiʻo o ka martensitic stainless steel aia ma ka laulā o 12% - 18%, a ʻo kāna mau mea hoʻohui nui he hao, chromium, nickel a me carbon.
Hiki i ke kila kila Martensitic ke hoʻololi i kona mau waiwai mechanical ma o ka mālama ʻana i ka wela a he ʻano kila kila paʻakikī. Hiki ke hoʻokaʻawale ʻia ke kila kila martensitic i loko o ke kila chromium martensitic a me ke kila chromium-nickel martensitic e like me nā haku mele ʻokoʻa.
Nānā wikiwiki o Martensitic Stainless Steel | |
| Māhele | Kila kohu ʻole |
| Wehewehe | He ʻano kila kuhili ʻole paʻakikī me ke ʻano Martensitic |
| Hoʻomaʻamaʻa Wela | Hoʻopiʻi ʻana, hoʻopau ʻana, hoʻopaʻa ʻana |
| Nā ʻĀpana Alloy | Cr, Ni, C, Mo, V |
| Weldability | ʻilihune |
| Magnetic | Kauwaena |
| Hoʻolālā Micro | ʻO Martensitic ka nui |
| Papa maʻamau | Cr13, 2Cr13, 3Cr13 |
| Nā noi | ʻO ka ʻūhā turbine mahu, nā mea pākaukau, nā mea hana ʻokiʻoki, Aerospace, nā ʻoihana moana |
ʻO ke kila kila ʻole Martensitic e pili ana i kahi ʻano kila kila nona ka microstructure he martensite. ʻO ka chromium maʻiʻo o ka martensitic stainless steel aia ma ka laulā o 12% - 18%, a ʻo kāna mau mea hoʻohui nui he hao, chromium, nickel a me carbon.
Hiki i ke kila kila Martensitic ke hoʻololi i kona mau waiwai mechanical ma o ka mālama ʻana i ka wela a he ʻano kila kila paʻakikī. Hiki ke hoʻokaʻawale ʻia ke kila kila martensitic i loko o ke kila chromium martensitic a me ke kila chromium-nickel martensitic e like me nā haku mele ʻokoʻa.
1. ʻO Martensitic Chromium Steel
Ma waho aʻe o ka chromium, ʻo ke kila chromium martensitic kekahi i loaʻa i kahi nui o ke kalapona. Hoʻoholo ka maʻiʻo chromium i ka pale ʻana o ke kila. ʻO ke kiʻekiʻe o ke kalapona, ʻoi aku ka kiʻekiʻe o ka ikaika, paʻakikī a me ke kūpaʻa ʻana. ʻO ke ʻano maʻamau o kēia ʻano kila he martensite, a aia kekahi i kahi liʻiliʻi o austenite, ferrite a i ʻole pearlite. Hoʻohana nui ia i ka hana ʻana i nā ʻāpana, nā ʻāpana, nā mea hana, nā pahi, a me nā mea ʻē aʻe e koi ai i ka ikaika kiʻekiʻe a me ka paʻakikī, akā ʻaʻole koi i ke kūpaʻa corrosion kiʻekiʻe. ʻO nā māka kila maʻamau ʻo 2Crl3, 4Crl3, 9Crl8, etc.
2. Ke kila Martensitic Chromium-Nickel
ʻO ke kila martensitic chromium-nickel ka martensitic precipitation hardening stainless steel, semi-austenitic precipitation hardening stainless steel a me ka maraging stainless steel, a me nā mea ʻē aʻe, ʻo ia mau mea āpau he mau kila kuhili ʻole ka ikaika kiʻekiʻe. Loaʻa i kēia ʻano kila ke kalapona haʻahaʻa (emi iho ma mua o 0.10%) a loaʻa ka nickel. Loaʻa kekahi mau māka i nā mea kiʻekiʻe e like me ka molybdenum a me ke keleawe. No laila, he ikaika kiʻekiʻe kēia ʻano kila, ʻoiai e hui pū ana i ka ikaika a me ka paʻakikī a me ke kūpaʻa corrosion. ʻOi aku ka maikaʻi o ka hana, weldability, etc. ma mua o ke kila chromium martensitic. ʻO Crl7Ni2 ke kila kila martensitic haʻahaʻa haʻahaʻa.
Martensiteka paʻakikī o ka uai loko o ke kila Al, Ti, Cu a me nā mea ʻē aʻe. Hoʻopau ia i ka Ni3A1, Ni3Ti a me nā ʻāpana hoʻoikaika ʻē aʻe ma ka martensite matrix ma o ka paʻakikī paʻakikī e hoʻomaikaʻi hou i ka ikaika o ke kila. ʻO Semi-austenite (a semi-martensitic) ua hoʻopaʻakikī paʻakikī i ke kila kila, no ka mea, he austenite mau ke aupuni kinai, no laila hiki ke hoʻohana ʻia ke aupuni kinai ʻia a hoʻoikaika ʻia e ka mālama waena, ka mālama ʻana a me nā kaʻina hana ʻē aʻe. Ma kēia ala, ʻo ka austenite i ka martensitic precipitation hardening stainless steel hiki ke hoʻololi pololei ʻia i martensite ma hope o ke kinai ʻana, e alakaʻi ana i ka hemahema o ka paʻakikī i ka hana a me ka hana ʻana. ʻO nā māka kila maʻamau ʻo 0Crl7Ni7AI, 0Crl5Ni7M02A1 a pēlā aku. He ʻano kiʻekiʻe ka ikaika o kēia ʻano kila, hiki i ka 1200-1400 MPa, a hoʻohana pinepine ʻia e hana i nā ʻāpana hana ʻaʻole koi i ke kūpaʻa corrosion kiʻekiʻe akā koi i ka ikaika kiʻekiʻe.
ʻO ka lāʻau wela maʻamau i hoʻohana ʻia no ka martensitic stainless steel ʻo ia ka hoʻopau ʻana a me ka mālama ʻana. E koho maʻamau i ka ʻaila a i ʻole ka ea ma kahi mahana o 950-1050 ℃. A laila e hoʻonāuki i ka 650-750 ° C. ʻO ka mea maʻamau, pono e hoʻomāliʻi koke ʻia ma hope o ke kinai ʻana i mea e pale ai i ka hoʻoheheʻe ʻana mai ka haki ʻana ma muli o ke koʻikoʻi o ka hale kinai.
Kiʻekiʻe-ikaika haʻahaʻa-carbon martensitic kuhiliʻole kila castings i loaʻa ka liʻiliʻi o ka nickel, molybdenum, silicon a me nā mea hoʻoheheʻe'ē aʻe i loaʻa maikaʻi piha mechanical waiwai, welding waiwai a me ka lole pale ma hope o normalizing a me ka tempering. Hoʻohana nui ʻia ia mau hoʻoheheʻe ʻana i ka hoʻolei ʻana a me ka hoʻolei + welding impellers o nā turbines hydraulic nui. I kēia hihia, ʻo ka hoʻomaʻamaʻa ʻana i ka wela i koho maʻamau ʻia ma 950 - 1050 ℃ a me ka hoʻoluhi ʻana ma 600 -670 ℃.
Ka manawa hoʻouna: ʻAukake-17-2021