Kūʻai kūʻai o 40Cr paipu kila no ka hana ʻana
ʻO ka paipu kila 40Cr he ʻano kila poepoe me ka ʻāpana hakahaka a ʻaʻohe hui a puni. Hana ʻia ia me ka paipu paʻa paʻa ma o ka perforation, a laila hana ʻia me ka ʻōwili wela, ka ʻōwili anu a i ʻole ke kiʻi anu. Ke hoʻohālikelike ʻia me ke kila pōʻai a me nā kila paʻa ʻē aʻe, i ka wā e like ai ke kulou a me ka ikaika torsional, ʻoi aku ka maʻalahi o ke kaumaha o ka paipu kila, ʻo ia ke ʻano o ke kila ʻāpana waiwai.
E like me GB / T 3077-2008: kemika haku mele (ka hapa nui,%) C 0.37 ~ 0.44, Si 0.17 ~ 0.37, Mn 0.50 ~ 0.80, cr0.80 ~ 1.10, Ni ≤ 0.30【 Mechanical waiwai]
Ka nui hakahaka (mm): 25
ʻO ka wela wela o ke kinai mua (℃): 850; Mea hooluolu: Aila
ʻO ka wela wela hoʻoheheʻe ʻelua (℃):-
Ka wela wela wela (℃): 520; Mea hoʻoluʻu: wai, ʻaila
Ka ikaika uʻi (σ b/MPa): ≧980
Ka helu hua (σ s/MPa): ≧785
ʻO ka lōʻihi ma hope o ka haki ʻana(δ 5/%): ≧9
Hoemi o ka āpana(ψ/%): ≧45
Impact absorption energy (aku2 / J): ≥ 47
ʻO Brinell paʻakikī (hbs100 / 3000) (annealed a i ʻole ka wela wela): ≤ 207
ʻO nā māka kila maʻamau o GB ma Kina he 40Cr, DIN material No. 1.17035 / 1.7045, DIN 41Cr4 / 42gr4, en 18, BS 41Cr4, AFNOR 42c4, NF 38cr4 / 41Cr4, uni 41Cr4 / 41Cr4, DIN 41Cr4 / 42gr4, en 18, BS 41Cr4, AFNOR 42c4, NF 38cr4 / 41Cr4, uni 41Cr4, N4Cr4, N4Cr4, N41C5 American / ASTM Standard Steel No. 5140, Japanese JIS kila maʻamau No. scr440 (H) / scr440, American AISI / SAE / ASTM Steel No. 5140, hui honua no Standardization ISO standard steel No. 41Cr4.
(kokoke) ACM = 780 ℃
ʻO ka mahana 850 ~ 870 ℃, paʻakikī 179 ~ 229hbs.
ʻO ka mahana he 740 ~ 760 ℃, ʻo ka manawa paʻa ʻo 4 ~ 6h, a laila hoʻomaha ʻia ka mahana i ≤ 600 ℃ ma ka pae hoʻomaha o 5 ~ 10 ℃ / h.
ʻO ka paʻakikī ma mua o ka mālama ʻana ≤ 217hbs, ka paʻakikī ma hope o ka palupalu ≤ 163hbs.
(670 ± 10) ℃ × 2H, piʻi ka mahana me ka umu ahi, (710 ± 10) ℃ × 2H, hoʻomaha me ka umu, (670 ± 10) ℃ × 2H, piʻi ka mahana me ka umu, (710 ± 10) ℃ × 2H, a laila e hoʻohaʻahaʻa i ka mahana me ka umu, (670 ± 10) ℃ × 2H, piʻi ka mahana me ka umu, (710 ± 10) ℃ × 2H, hoʻomaha me ka umu no 3 mau pōʻai, a laila hoʻomaha i lalo 550 ℃ no ka hoʻoluʻu ea. ʻO ka paʻakikī ma hope o ka mālama ʻana he 153hbs.
ʻO ke ana wela 850 ℃ ± 10 ℃, hoʻoluʻu aila; ʻO ka mahana wela 520 ℃ ± 10 ℃, ka wai, ka aila a me ka hoʻoluʻu ea.
Medium carbon modulated steel, poʻomanaʻo anuanu make kila. ʻO ke kila ke kumukūʻai kūpono a me ka hana maʻalahi. Ma hope o ka hoʻomaʻamaʻa wela kūpono, hiki iā ia ke loaʻa i kekahi paʻakikī, plasticity a me ke kūpaʻa. Hiki i ka Normalizing ke hoʻoikaika i ka tissue spheroidization a hoʻomaikaʻi i ka hana ʻoki ʻana o nā blanks me ka paʻakikī ma lalo o 160hbs. Hoʻopili ʻia i ka 550 ~ 570 ℃, ʻoi aku ka maikaʻi o ke kila. ʻOi aku ka paʻakikī o kēia kila ma mua o ke kila 45. He kūpono ia no ka mālama ʻana i ka paʻakikī o ka ʻili e like me ka hoʻopiʻi pinepine ʻana a me ka hoʻopau ʻana i ke ahi.
Ma hope o ke kinai ʻana a me ka hoʻoulu ʻana, hoʻohana ʻia kēia kila no ka hana ʻana i nā ʻāpana mechanical e lawe ana i ka haʻahaʻa haʻahaʻa a me ka wikiwiki waena, e like me ke kī hoʻokele, ka hapalua hope o ke kaʻa, ka pahu, ka ʻau, ka ilo, ka ʻāpana spline, ka lima waena, a me nā mea ʻē aʻe ma ka mīkini mīkini; Ma hope o ka hoʻopau ʻana a me ka hoʻonā wela wela, hoʻohana ʻia ia e hana i nā ʻāpana e lawe ana i ka ukana kiʻekiʻe, ka hopena a me ka wikiwiki wikiwiki, e like me ke kāʻei, ka pahu nui, ka rotor pump oil, sliding block, collar, etc. Ma hope o ka hoʻopau ʻana a me ka haʻahaʻa haʻahaʻa haʻahaʻa, hoʻohana ʻia e hana i nā ʻāpana me ka haʻahaʻa haʻahaʻa, haʻahaʻa haʻahaʻa, ʻaʻahu i ke kūpaʻa a me ka mānoanoa paʻa ma lalo o 25mm ma ka ʻāpana, e like me ka ilo, ke kumu nui, ke kumu, ke kola, etc. Ma hope o ka hoʻopau ʻana a me ka hoʻoulu ʻana a me ka hoʻopau ʻana i ka ʻili kiʻekiʻe, hoʻohana ʻia ia e hana i nā ʻāpana me ka paʻakikī o ka ʻili kiʻekiʻe a me ke kūpaʻa ʻana me ka ʻole o ka hopena nui, e like me ke kāʻei, ka lima, ka lāʻau, ke kumu nui, crankshaft, spindle, pin, connecting rod, screw, nut, inlet valve, etc. Eia kekahi, ua kūpono kēia kila no ka hana ʻana i nā ʻāpana hoʻoili like ʻole i mālama ʻia e ka carbonitriding, e like me nā gears a me nā shafts me ke anawaena nui a me ka paʻakikī haʻahaʻa haʻahaʻa maikaʻi.
Annealed, paakiki ≤ 207hbs. 40Cr elastic modulus: elastic modulus E (20 ℃) / MPA 200000 ~ 211700, shear modulus G (20 ℃) 80800
ʻO ke kaʻina hana Quenching o 40Cr
40Cr kinai ana, 850 ℃, aila hooluolu; Hoʻomaʻamaʻa 520 ℃, hoʻoluʻu wai, hoʻoluʻu aila. ʻO ka paʻakikī paʻakikī o ka paipu kila 40Cr he hrc52-60, a hiki i ka hoʻopau ʻana o ke ahi ke hiki i ka hrc48-55.
40Cr nitriding lapaʻau
No ke kila nitrided ka 40Cr, a ua kūpono kona mau mea i ka nitriding. Hiki iā 40Cr ke loaʻa ka paʻakikī kiʻekiʻe ma hope o ka mālama ʻana i ka nitriding, a ʻo ka paʻakikī kiʻekiʻe ma hope o ka mālama nitriding hiki ke hiki i ka hra72 ~ 78, ʻo ia hoʻi hrc43 ~ 55. ʻO ke ala kaʻina hana Nitriding: forging annealing rough machining quenching a me tempering finish machining stress removal rough grinding nitriding finish grinding or wili ana. Ma muli o ka lahilahi a me ka palupalu o ka papa nitrided, pono e loaʻa kahi ʻano kumu ikaika kiʻekiʻe, no laila pono e hoʻokō mua i ka hoʻopau ʻana a me ka hoʻomaʻamaʻa ʻana i ka wela no ka loaʻa ʻana o ka sorbite tempered a hoʻomaikaʻi i nā waiwai mechanical o ke kumu a me ka maikaʻi. ka papa nitrided. ʻO ka nitriding palupalu ka nitriding ikaika, a hoʻohana mau ʻia ka nitriding kinoea
40Cr wiliwili
Ma mua o ke kuʻi ʻana o 40Cr, e hoʻolohe i ka preheating e pale aku i ka māwae i loko o ka weld ma muli o ka hoʻohemo ʻana o ka wela matrix. ʻOi aku ka maikaʻi o ka normalize ma mua o ka welding.
Weldability o 40Cr: he maʻalahi ke hoʻokaʻawale i ka wā crystallization a paʻakikī i ka crystallization māwae (he ʻano o ka māwae wela). He mea maʻalahi ka haki ʻana i ka lua a me ka ʻāpana concave i ka weld i ka wā wili. Me ka maʻi kalapona kiʻekiʻe, maʻalahi ka loaʻa ʻana o ka hale paʻakikī (martensite) i maʻalahi loa i nā māwae anu i ka wā e hoʻomaha wikiwiki ai. Ke nui ka nui o ka hooluolu o ka wahi wela wela loa, ua maʻalahi ka hana ʻana i ka martensite kalapona kiʻekiʻe paʻakikī a brittle a embrittle i ka ʻāpana wela.
1. Hana ʻia ka welding ma ke kūlana annealed (normalized).
2. ʻAʻole i kaupalena ʻia ke ʻano kuʻi
3.Hiki ke hoʻonui ʻia ka mahana preheating me ka ikehu laina nui. ʻO ka maʻamau, hiki ke mālama ʻia ka mahana preheating a me ka interlayer ma waena o 250 ~ 300 ℃.
4. ʻO ka mea wiliwili e hōʻoia i ka hana ʻana o ka metala i waiho ʻia e like me ka metala kumu, e like me j107-cr
5.E hoʻokō ʻia ka hoʻopau ʻana a me ka mālama ʻana i ka wela i ka manawa ma hope o ka wili. Inā paʻakikī ka hoʻokō ʻana i ka hoʻopau ʻana a me ka mālama ʻana i ka manawa, hiki ke hoʻokō ʻia ka annealing intermediate a i ʻole ka paʻa ʻana i kahi mahana ma mua o ka preheating no kekahi manawa e hoʻopau i ka hydrogen diffused a hoʻomaʻamaʻa i ke ʻano. No nā huahana me ka hana paʻakikī a me nā welds he nui, hiki ke hana ʻia kahi annealing waena ma hope o ka wili ʻana i kekahi helu o nā welds.
