E like me kā mākou e ʻike ai, ua hoʻokaʻawale ʻia nā mea o nā mea hoʻopaʻa kila i loko o ke kila kila austenitic, ke kila kila ferritic a me ke kila kila martensitic.
Hoʻokaʻawale ʻia nā māka o nā bolts stainless steel i 45, 50, 60, 70, a me 80. Hoʻokaʻawale ʻia nā mea i austenite A1, A2, A4, martensite a me ferrite C1, C2, a me C4. ʻO kāna ʻano hōʻike e like me A2-70, ma mua a ma hope o "--" e hōʻike ana i ka mea bolt a me ka pae ikaika.
1. Ferritic kuhiliʻole kila
(15% -18% Chromium) - He 65,000 - 87,000 PSI ke kila kila Ferritic. ʻOiai ʻaʻole ia e ʻōlelo ʻia no ka hoʻohana ʻana i nā wahi e hiki mai ai ka corrosion, a ua kūpono i nā wili kila kila me ka ʻoi aku ka kiʻekiʻe o ka corrosion a me ka wela, a me nā koi ikaika. ʻAʻole hiki ke mālama ʻia kēia mea. Ma muli o ke kaʻina hana hoʻoheheʻe ʻana, he magnetic a ʻaʻole kūpono no ke kūʻai ʻana. Aia nā māka Ferritic: 430 a me 430F.
2.Martensitic kuhiliʻole kila
(12%-18% Chromium) - Manaʻo ʻia ke kila kuhili martensitic he kila magnetic. Hiki ke mālama ʻia ka wela e hoʻonui i kona paʻakikī a ʻaʻole ʻōlelo ʻia no ka wili. ʻO nā kila kila o kēiaʻano: 410, 416, 420, a me 431. Loaʻa iā lākou ka ikaika tensile ma waena o 180,000 a me 250,000 PSI.
Hiki ke hoʻoikaika ʻia ka Type 410 a me Type 416 e ka mālama wela, me ka paʻakikī o 35-45HRC a me ka machinability maikaʻi. He mau wili kila kuhiliʻole ka wela a me ka corrosion no nā kumu maʻamau. 'O ka 'ano 416 ka mea i 'oi a'e ka nui o ka sulfur a he kila kuhili ma'alahi ke 'oki. ʻO Type 420, me ka sulfur content o R0.15%, ua hoʻomaikaʻi i nā waiwai mechanical a hiki ke hoʻoikaika ʻia e ka mālama wela. ʻO 53-58HRC ka nui o ka paʻakikī. Hoʻohana ʻia ia no nā wili kila kila e pono ai ka ikaika kiʻekiʻe.
3.Austenitic kuhiliʻole kila
(15% -20% chromium, 5% -19% nickel) - Loaʻa i nā kila kila Austenitic ke kūpaʻa kiʻekiʻe loa o nā ʻano ʻekolu. ʻO kēia papa o ke kila kila e pili ana i kēia mau māka: 302, 303, 304, 304L, 316, 321, 347, a me 348. Loaʻa iā lākou ka ikaika tensile ma waena o 80,000 - 150,000 PSI. ʻO ke kūpaʻa corrosion paha, a i ʻole kona mau ʻano mechanical.
Hoʻohana ʻia ke ʻano 302 no nā wili mīkini a me nā bolts paʻi ponoʻī.
ʻAno 303 I mea e hoʻomaikaʻi ai i ka hana ʻoki ʻana, hoʻohui ʻia kahi liʻiliʻi o ka sulfur i ke kila kila kila Type 303, i hoʻohana ʻia no ka hoʻoponopono ʻana i nā nati mai ka waihona bar.
He kūpono ke ʻano 304 no ka hoʻoponopono ʻana i nā wili kila kila ma ke kaʻina hana poʻomanaʻo wela, e like me nā bolts kikoʻī lōʻihi a me nā bolts anawaena nui, ʻoi aku paha ma mua o ke ʻano o ke kaʻina hana poʻo anu.
He kūpono ke ʻano 305 no ka hoʻoponopono ʻana i nā wili kila ma ke kaʻina poʻomanaʻo anu, e like me nā nuts i hana ʻia a me nā bolts hexagonal.
ʻO nā ʻano 316 a me 317, loaʻa iā lākou ʻelua alloying element Mo, no laila ʻoi aku ka kiʻekiʻe o ko lākou ikaika wela a me ke kūpaʻa corrosion ma mua o 18-8 stainless steel.
ʻO Type 321 a me Type 347, Type 321 i loaʻa iā Ti, kahi mea hoʻohui paʻa paʻa, a ʻo Type 347 i loaʻa iā Nb, kahi e hoʻomaikaʻi ai i ka pale ʻana o ka corrosion intergranular o ka mea. He kūpono ia no nā ʻāpana maʻamau kila kila ʻaʻole i hoʻopili ʻia ma hope o ke kuʻi ʻana a i ʻole i ka lawelawe ma 420-1013 °C.
Ka manawa hoʻouna: Jul-18-2023