He nui nā pōmaikaʻi o nā paipu kila kila mānoanoa, e like me ke kūpaʻa ʻana o ka oxidation kiʻekiʻe, ke kūpaʻa corrosion ikaika, ka plasticity maikaʻi, ka hana wiliwili maikaʻi, a me nā mea ʻē aʻe, a hoʻohana nui ʻia i nā ʻano ʻoihana kīwila. Eia nō naʻe, ma muli o ka haʻahaʻa haʻahaʻa a me ka haʻahaʻa haʻahaʻa haʻahaʻa o ke kila kila, e kaupalena ʻia kāna noi i nā manawa he nui, ʻoi aku hoʻi i loko o kahi kaiapuni kahi i loaʻa ai nā kumu he nui e like me ka corrosion, ka lole, a me ka ukana kaumaha a pili kekahi i kekahi, ke ola lawelawe o e hoʻopōkole loa ʻia nā mea kila kila. No laila, pehea e hoʻonui ai i ka paʻakikī o ka ʻili o nā paipu kila kila mānoanoa?

I kēia manawa aia kahi ala e hoʻonui ai i ka paʻakikī o ka ʻili o nā paipu pā mānoanoa e ka ion nitriding e hoʻomaikaʻi i ke kūpaʻa ʻana a no laila e hoʻolōʻihi i kona ola lawelawe. Eia naʻe, ʻaʻole hiki ke hoʻoikaika ʻia nā paipu kila kila austenitic e ka hoʻololi ʻana i ka pae, a ʻo ka nitriding ion maʻamau he kiʻekiʻe nitriding wela, ʻoi aku ka kiʻekiʻe ma mua o 500 ° C. E hoʻoheheʻe ʻia ka Chromium nitrides i ka papa nitriding, e hana ʻino ai ka matrix stainless steel matrix. ʻOiai e hoʻonui nui ʻia ka paʻakikī o ka ʻili, e hoʻonāwaliwali ʻia ka pale ʻana o ka ʻili o ka paipu, a laila e nalowale nā ​​hiʻohiʻona o nā paipu kila kila mānoanoa.

ʻO ka hoʻohana ʻana i nā mea hana DC pulse ion nitriding no ka mālama ʻana i nā paipu kila austenitic me ka nitriding ion haʻahaʻa haʻahaʻa hiki ke hoʻonui i ka paʻakikī o ka ʻili o nā paipu kila mānoanoa me ka mālama ʻole ʻana i ke kūpaʻa corrosion ʻaʻole i hoʻololi ʻia, a laila e hoʻonui ai i ko lākou pale ʻana. Hoʻohālikelike ʻia me nā laʻana i mālama ʻia i ka nitriding ion ma ka mahana nitriding maʻamau, ʻike maopopo loa ka hoʻohālikelike ʻikepili.

Ua hoʻokō ʻia ka hoʻokolohua ma kahi 30kW DC pulse ion nitriding furnace. ʻO nā palena o ka DC pulse power supply he adjustable voltage 0-1000V, adjustable duty cycle 15% -85%, a me ke alapine 1kHz. Ana ʻia ka ʻōnaehana ana wela e kahi thermometer infrared IT-8. Ka mea o ka hāpana mea austenitic 316 mānoanoa-pā kuhiliʻole kila paipu, a me kona kemika haku mele 0.06 kalapona, 19.23 chromium, 11.26 nikela, 2.67 molybdenum, 1.86 manganese, a me ke koena mea hao. ʻO Φ24mm×10mm ka nui hāpana. Ma mua o ka hoʻokolohua, hoʻomaʻemaʻe ʻia nā laʻana me ka pepa ʻili wai no ka wehe ʻana i nā ʻaila ʻaila, a laila hoʻomaʻemaʻe a hoʻomaloʻo ʻia me ka waiʻona, a laila hoʻokomo ʻia i waenakonu o ka disk cathode a hoʻomāmā i lalo o 50Pa.

Hiki i ka microhardness o ka papa nitrided ke piʻi aku ma luna o 1150HV i ka wā e hana ʻia ai ka nitriding ion ma nā paipu wili wili ʻia austenitic 316 ma nā haʻahaʻa haʻahaʻa a me nā mahana nitriding maʻamau. ʻO ka papa nitrided i loaʻa ma ka haʻahaʻa haʻahaʻa ion nitriding ʻoi aku ka lahilahi a he kiʻekiʻe ka paʻakikī paʻakikī. Ma hope o ka haʻahaʻa haʻahaʻa haʻahaʻa ion nitriding, hiki ke hoʻonui ʻia ka pale ʻana o ke kila austenitic e 4-5 mau manawa, a ʻaʻole i hoʻololi ʻia ke kūpaʻa corrosion. ʻOiai hiki ke hoʻonui ʻia ke kūpaʻa ʻaʻahu e 4-5 mau manawa e ka nitriding ion i ka mahana nitriding maʻamau, e hoʻemi ʻia ke kūpaʻa ʻana o nā paipu mānoanoa austenitic stainless steel i kekahi ʻano no ka mea e hoʻoheheʻe ʻia ka chromium nitrides ma ka ʻili.