(1) ʻO ka ʻokoʻa nui ma waena o nā mea kila i hoʻohana ʻia no nā ʻāpana kaulahao ma ka home a me nā ʻāina ʻē i loko o nā pā kaulahao i loko a me waho. Pono ka hana o ka pā kaulahao i ka ikaika tensile kiʻekiʻe a me kekahi paʻakikī. Ma Kina, 40Mn a me 45Mn ka mea maʻamau no ka hana ʻana, a ʻaʻole hoʻohana pinepine ʻia ka 35 kila. ʻOi aku ka laulā o ka hui kemika o nā pā kila 40Mn a me 45Mn ma mua o nā kila S35C a me SAEl035 haole, a he 1.5% a 2.5% ka mānoanoa decarburization ma ka ʻili. No laila, ʻeha pinepine ka pā kaulahao i ka haki ʻana ma hope o ke kinai ʻana a me ka hoʻoluhi ʻana.
I ka wā o ka ho'āʻo paʻakikī, haʻahaʻa ka paʻakikī o ka ʻili o ka pā kaulahao ma hope o ke kinai ʻana (emi iho ma mua o 40HRC). Inā pau kekahi mānoanoa o ka papa honua, hiki i ka paʻakikī ke piʻi aku ma mua o 50HRC, kahi e hoʻopilikia nui ai i ka ukana tensile haʻahaʻa o ke kaulahao.
(2) Hoʻohana maʻamau nā mea hana ʻē aʻe iā S35C a me SAEl035, a hoʻohana i nā kapuahi carburizing kāʻei hoʻomau ʻoi aku ka holomua. I ka wā o ka hoʻomaʻamaʻa wela, hoʻohana ʻia kahi lewa pale no ka mālama recarburization. Eia kekahi, hoʻokō ʻia ka mana kaʻina hana ma ka pūnaewele, no laila ʻaʻole hiki ke loaʻa nā kaulahao. Ma hope o ke kinai ʻana a me ka hoʻomaʻamaʻa ʻana, hiki mai ka haʻihaʻi a i ʻole ka paʻakikī o ka ʻili.
Hōʻike ka nānā ʻana i ka metallographic he nui ka nui o ka hale martensite e like me ka nila (ma kahi o 15-30um) ma ka ʻili o ka pā kaulahao ma hope o ke kinai ʻana, ʻoiai ʻo ke kumu he ʻano martensite e like me ka strip-like. Ma lalo o ke kūlana o ka mānoanoa pāʻani kaulahao like, ʻoi aku ka nui o ka ukana tensile haʻahaʻa ma hope o ka hoʻoulu ʻana ma mua o nā huahana home. Ma nā ʻāina ʻē, hoʻohana mau ʻia nā papa mānoanoa 1.5mm a ʻo ka ikaika tensile e koi ʻia he> 18 kN, aʻo nā kaulahao kūloko e hoʻohana maʻamau i nā papa mānoanoa 1.6-1.7mm a ʻo ka ikaika tensile e koi ʻia he> 17.8 kN.
(3) Ma muli o ka hoʻomaikaʻi mau ʻana o nā koi no nā ʻāpana kaulahao kaʻa, hoʻomau nā mea hana hale a me nā haole i ka hoʻomaikaʻi ʻana i ke kila i hoʻohana ʻia no nā pine, nā lima lima a me nā wili. ʻO ka haʻahaʻa haʻahaʻa haʻahaʻa a me ke kūpaʻa ʻana o ke kaulahao e pili ana i ke kila. Ma hope o ka koho ʻana o nā mea hana hale a me nā ʻāina ʻē i ke kila 20CrMnTiH e like me ka mea pine ma kahi o 20CrMnMo, ua hoʻonui ʻia ka ukana tensile kaulahao e 13% a i 18%, a ua hoʻohana nā mea hana haole i ke kila SAE8620 e like me ka pine a me nā mea lima. Pili pū kēia me kēia. Ua hōʻike ka hoʻomaʻamaʻa ʻana ma ka hoʻomaikaʻi ʻana i ke āpau kūpono ma waena o ka pine a me ka lima, ka hoʻomaikaʻi ʻana i ke kaʻina hana wela a me ka lubrication, hiki ke hoʻomaikaʻi maikaʻi ʻia ke kūpaʻa a me ka ukana tensile o ke kaulahao.
(4) Ma nā ʻāpana kaulahao kaʻa kaʻa, ʻo ka pā loulou i loko a me ka lima lima, ka pā loulou waho a me ka pine i hoʻopaʻa pū ʻia me kahi kūpono kūpono, ʻoiai ʻo ka pine a me ka lima he kūpono kūpono. ʻO ke kūpono ma waena o nā ʻāpana kaulahao he mana nui i ka pale ʻana a me ka haʻahaʻa tensile haʻahaʻa o ke kaulahao. E like me nā manawa hoʻohana like ʻole a me nā ukana pōʻino o ke kaulahao, ua māhele ʻia i ʻekolu mau pae: A, B a me C. Hoʻohana ʻia ka papa A no ka lawe kaumaha, ka wikiwiki a me ka nui; Hoʻohana ʻia ka papa B no ka hoʻouna maʻamau; Hoʻohana ʻia ka papa C no ka hoʻololi ʻana i nā mea hana maʻamau. No laila, ʻoi aku ka paʻakikī o nā koi hoʻonohonoho ma waena o nā ʻāpana kaulahao Class A.
Ka manawa hoʻouna: Sep-08-2023