ʻO ka hoʻolei ʻana i loko o ka piko a i ʻole ka hoʻopololei ʻana e hoʻopilikia pū i ka pilikia o ka pohā i ka wā o ka hoʻololi ʻana o ka pickling.paipu lauwili.
ʻO 0Cr15mm9Cu2nin a me 0Cr17Mm6ni4Cu2N ke kila kila ma ka 200 series austenitic stainless steel, he ʻokoʻa ia mai ka 200 series a me 300 series austenitic.kila kohu ʻole.ʻO kēia ʻano200paipu huinahalike kuhiliʻolehiki i nā māwae lihi, nā māwae ili, ka pilikia o ka maikaʻi ʻole o ka pohō o ka lihi.I loko o ka hana ʻōwili wela maoli, ua hoʻohana nā ʻano kila ʻelua i ka 200 series heat curves, a mālama ʻia ka mahana o ka umu ma 1215-1230C.Hoʻokomo kona ʻōnaehana wela i ke ʻano kamepiula papa lua "Rough Rolling Regulations" a me "Finish Rolling Regulations".800-1020C.E pili ana i ke kaʻina ʻōwili wela maoli o ʻelua picklingpaipu lauwili, e hoʻolālā i ka ʻōnaehana hoʻomehana a me ka wela deformation o kēia ʻano hoʻāʻo, a laila e hoʻokō i ka hoʻāʻo ʻana i ka ʻōwili wela i hoʻohālikelike ʻia ma ka mea hoʻāʻo wela wela i hoʻolālā ʻia a hana ʻia e mākou.ʻO ka ʻike o kēia lā o ka hui paipu huinahā: me ka hoʻohana ʻana i ke kaʻina hana hoʻomaʻemaʻe AOD+LF e hana ai i ka 0Cr15Mm9Cu2Nn a me 0Cr17I6ni4Cu2N pickling non-vascular hoʻomau hoʻomau i ka hoʻolei mau ʻana ma o ke kaʻina hoʻolei mau ʻana, ʻo ka nui o ke keʻa o ka hoʻolei mau ʻana he 220m1260m.Hōʻike ʻia ka hakina % ma ka pākaukau.ʻO ka microstructure o ka pūpū ʻino ma nā hohonu like ʻole o ka 0Cr15m9Cu2Nn waika holoi ʻole i ka hoʻolei mau ʻana, e like me ka mea i hōʻike ʻia ma ke kiʻi, pili i ka hohonu o ka pūpū ʻino.I ka wā e kū mai ai kahi kūlana ʻino a ʻaʻole e hāʻule ka mahana o ka lihi o ka hoʻolei ʻana i ka pae haʻahaʻa haʻahaʻa haʻahaʻa.ʻO ka microstructure ma 15 a me 25m.ʻO ke ʻano o ka microstructure a me ka nui o ka palaoa o ka 20g kiʻekiʻe-pressure boiler tube e hoʻonui ʻia me ka hohonu o ka pūpū slab.Hoʻololi, akā hōʻike i kekahi ʻokoʻa.Ma ka hohonu o ka pūpū d0m, ʻo ka microstructure ka nui o ka ʻano iwi iwi dendrite, a he liʻiliʻi ka spacing dendrite mua a lua.Ma ka d5mm, he hale dendrite ka nui.
Nui ka mamao o Dendrite.Ma ka d> 15mn, ua like nā dendrites me he ilo, akā ma ka d25m, he mau kristal cellular ka nui.ʻO ka microstructure o ka pahu pahu Cr17Im6ni4Cu2N pahu hoʻoheheʻe mau ʻia ma ka Fig.ʻOiai aia kekahi mau ʻokoʻa i ka morphology dendrite, ʻo kona ʻano i haku ʻia me kahi matrix austenite hina, a me ka ferrite ʻeleʻele.E like me ka paipu huinaha 0Cr15Mn9Cu2Nin, i ka piʻi ʻana o ka hohonu o ka pūpū, e piʻi mālie ana ka mokowā dendrite mua a me ka lua, a hoʻololi ke ʻano dendrite mai kahi iwi a i ilo., ua ho'āʻo ʻia ka ʻano plastik i ke kaʻina hana o ka hoʻololi ʻana o ka martensitic phase i nā paipu kila hoʻohuihui kūʻokoʻa, a me ka nui o ka palaoa austenite a me kāna kānāwai ulu ʻai austenite, martensite orientation, plasticity transformation phase, Nā hopena o ke kaumaha a me ka morphology i nā waiwai mechanical. o na paipu kila huikau-paa.Ma lalo o ke kūlana o ka mahana 1010 austenitization 15mir, ka hoʻomaka wela s a me ka hopena wela wahi ㎡ o martensitic hoʻololi hoʻonui me ka piʻi ʻana o ka austenitization wela, a me nā ʻāpana o ka hoʻololi ʻana i ka pae hoʻohālike o ka hoʻololi ʻana i ka paipu kila hui pū me ka hoʻonui me ka hoʻonui i ke koʻikoʻi like.Ke emi iho ka mahana austenitization ma mua o 1050C, hōʻike ka ulu ʻana o ka palaoa i kahi kaʻina ulu maʻamau.Me ka piʻi ʻana o ka manawa austenitization, piʻi aʻe ke kila poepoe.-3500 thermal simulator, ua hoʻāʻo ʻia ka ʻano palaki o ka paipu kila hoʻohuihui kūʻokoʻa i ka wā o ke kaʻina hana hoʻololi martensitic, a ua aʻo ʻia ka nui o ka palaoa austenite a me kāna kānāwai ulu ʻai austenite, a me nā hopena martensite o ka orientation, phase transformation plasticity, koʻikoʻi a me ka morphology ma nā ʻano mechanical o nā paipu kila hoʻohuihui kūpaʻa ʻaʻahu.Ma lalo o ke kūlana o 1010 austenitization no 15 minuke, ka hoʻomaka wela wahi s a me ka hopena wela wahi ㎡ o martensitic hoʻololi hoʻonui me ka piʻi 'ana o ka austenitization wela, a me ka palena K i ka māhele hoʻololi plasticity kŘkohu o ka lole-kū'ē puʻupuʻu kila paipu mahuahua me. ke kaumaha like.Ke emi iho ka mahana austenitizing ma mua o 1050C, hōʻike ka ulu ʻana o ka palaoa i kahi kaʻina ulu maʻamau.Ke piʻi nei ka manawa austenitizing, piʻi ʻo Is, a ua māhele ʻia ka hoʻololi B-phase i nā palena palaoa.ʻO ka nucleation a me ka ulu ʻana o nā pae a ʻElua mau pae o ka nucleation a me ka ulu ʻana o Widmanite a.pae.Ke hoʻonui ʻia ka nui o ka hoʻoluʻu mai 0.1C/s a i 150C/s, ʻo ke kaʻina hana hoʻololi o B+a a me + e hana nui ʻia i ka huila Ti-55.Hiki ke noho like a me ka li'ili'i ka hua i loko o ka paipu kila ho'opa'a 'a'ahu, a ua ho'okahe 'ia ka martensite Fine coherent complex carbide ma luna o ka ili.Ke hoʻohana nei i ka microscope electron transmission, scanning electron microscope, x-ray diffractometer a me nā ʻano electrochemical e aʻo ai i ka microstructure a me nā waiwai electrochemical o nā ʻāpana paipu kila hiki ke hoʻopaʻa ʻia i nā mokuʻāina like ʻole e like me ke kūlana hoʻolei, homogenized state, a me ke kūlana kaʻa, a me ka electron probe EPM. morphology a me ka haku mele 'ana o ka nui precipitates i loko o ka lole-pale kila paipu annealed ma 150-300C ua noiʻi ma ka ikehu spectrum kālailai.
Ka manawa hoʻouna: Mar-30-2023