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Q345 Mea Hoʻolauna

ʻO Q345 kahi mea kila.He kila haʻahaʻa haʻahaʻa (C<0.2%), hoʻohana nui ʻia i ke kūkulu ʻana, nā alahaka, nā kaʻa, nā moku, nā moku kaomi, a me nā mea ʻē aʻe. ʻO Q ke hōʻike nei i ka ikaika o kēia mea, a ʻo ka 345 e pili ana i ka waiwai o kēia. mea, ma kahi o 345 MPa.A e emi ana ka waiwai o ka hua me ka hoʻonui o ka mānoanoa mea.

Loaʻa i ka Q345 nā waiwai mechanical piha maikaʻi, ʻae ʻia ka haʻahaʻa haʻahaʻa haʻahaʻa hana, ka plasticity maikaʻi a me ka weldability, a hoʻohana ʻia e like me nā hale, nā ʻāpana mechanical, nā hale kūkulu hale, nā ʻāpana ʻāpana metala, wela a i ʻole maʻamau, hiki ke hoʻohana ʻia i nā hale like ʻole i nā ʻāina anu ma lalo. -40°C.

paipu kila kalapona api 5l
paipu kila api
api 5l papa b kiko'ī

Hoʻokaʻawale

 Q345 hiki ke maheleia i Q345A,Q345B, Q345C, Q345D, Q345E e like me ka papa.ʻO kā lākou mea e hōʻike ai ʻo ia ka wela o ka haʻalulu.

 Q345A pae, ʻaʻohe hopena;

Q345B pae, 20 degere ka hopena wela maʻamau;
Q345C pae, he 0 degere ka hopena;
Q345D pae, he -20 degere ka hopena;
ʻO ka pae Q345E, he -40 degere ka hopena.
Ma nā mahana hoʻohāhā like ʻole, ʻokoʻa nā waiwai haʻalulu.

haku mele

Q345A:C≤0.20,Mn ≤1.7,Si≤0.55,P≤0.045,S≤0.045,V 0.02~0.15;
Q345B:C≤0.20,Mn ≤1.7,Si≤0.55,P≤0.040,S≤0.040,V 0.02~0.15;
Q345C:C≤0.20,Mn ≤1.7,Si≤0.55,P≤0.035,S≤0.035,V 0.02~0.15,Al≥0.015;
Q345D:C≤0.20,Mn ≤1.7,Si≤0.55,P≤0.030,S≤0.030,V 0.02~0.15,Al≥0.015;
Q345E:C≤0.20,Mn ≤1.7,Si≤0.55,P≤0.025,S≤0.025,V 0.02~0.15,Al≥0.015;

vs. 16Mn

ʻO ke kila Q345 kahi mea pani no nā mea kila kahiko o 12MnV, 14MnNb, 18Nb, 16MnRE, 16Mn a me nā ʻano kila ʻē aʻe, ʻaʻole ia he pani no ke kila 16Mn.Ma ke ʻano o ka haku mele, ʻokoʻa ka 16Mn a me Q345.ʻO ka mea nui, aia kahi ʻokoʻa nui i ka nui o ka pūʻulu mānoanoa o nā kila ʻelua e like me ka ʻokoʻa i ka ikaika o ka hoʻoulu ʻana, a ʻo kēia ka mea e hoʻololi i ke koʻikoʻi ʻae ʻia o nā mea me kekahi mau mānoanoa.No laila, ʻaʻole kūpono ka hoʻopili wale ʻana i ke koʻikoʻi ʻae ʻia o ke kila 16Mn i ke kila Q345, akā pono e hoʻoholo hou ʻia ke koʻikoʻi e like me ka nui o ka hui mānoanoa kila.

ʻO ka māhele o nā mea nui o ke kila Q345 ka mea like me ke kila 16Mn, ʻo ka ʻokoʻa ke hoʻohui ʻia nā mea hoʻohui o V, Ti a me Nb.Hiki ke hoʻomaʻemaʻe i ka palaoa, hoʻomaikaʻi maikaʻi i ka paʻakikī o ke kila, a hoʻomaikaʻi maikaʻi i nā waiwai mechanical piha o ke kila.Ma muli o kēia e hiki ai ke hoʻonui i ka mānoanoa o ka pā kila.No laila, pono e ʻoi aku ka maikaʻi o nā mea mechanical piha o ke kila Q345 ma mua o ke kila 16Mn, ʻoi aku ka nui o kāna hana haʻahaʻa haʻahaʻa ʻaʻole i loaʻa i ke kila 16Mn.ʻOi aku ka kiʻekiʻe o ke koʻikoʻi o ke kila Q345 ma mua o ke kila 16Mn.

 

Paipu kila maʻemaʻe

hoʻohālikelike hana

Q345Dpaipu lauwilinā waiwai mechanical:
Ka ikaika tensile: 490-675 Ka ikaika hua: ≥345 Elongation: ≥22
Q345Bpaipu lauwilinā waiwai mechanical:
Ka ikaika tensile: 490-675 Ka ikaika hua: ≥345 Elongation: ≥21
Q345A paipu holoʻokoʻa mechanical waiwai:
Ka ikaika tensile: 490-675 Ka ikaika hua: ≥345 Elongation: ≥21
Q345C paipu holoʻokoʻa mechanical waiwai:
Ka ikaika tensile: 490-675 Ka ikaika hua: ≥345 Elongation: ≥22
Q345E paipu holoʻokoʻa mechanical waiwai:
Ka ikaika tensile: 490-675 Ka ikaika hua: ≥345 Elongation: ≥22

Huahana Huahana

Ke kila Q345D i hoʻohālikelike ʻia me ke kila Q345A, B, C.Haʻahaʻa ka wela hoʻāʻo o ka ikehu hopena haʻahaʻa.Hana maikaʻi.ʻOi aku ka liʻiliʻi o ka nui o nā mea ʻino P a me S ma mua o ka Q345A, B a me C. ʻOi aku ke kumu kūʻai ma mua o Q345A, B, C.

Wehewehe o Q345D:

① Hoʻokumu ʻia me ka helu Q + + hōʻailona māka maikaʻi + hōʻailona ala deoxidation.ʻO kona helu kila ma mua o ka "Q", e hōʻike ana i ka helu hua o ke kila, a ʻo ka helu ma hope o ia e hōʻike ana i ka waiwai o ka helu hua ma MPa.No ka laʻana, hōʻike ʻo Q235 i ke kila hana kalapona me kahi kiko hua (σs) o 235 MPa.

②Inā pono, hiki ke kaha ʻia ka hōʻailona e hōʻike ana i ka pae maikaʻi a me ke ʻano deoxidation ma hope o ka helu kila.ʻO nā hōʻailona papa maikaʻi ʻo A, B, C, D.Hōʻailona ʻano Deoxidation: F ʻo ia hoʻi ke kila paila;b 'o ia hoʻi ke kila semi-pepehi ʻia;ʻO Z ke kila make;ʻO TZ ke kila kila kūikawā, a ʻaʻole hiki ke kaha ʻia ke kila i pepehi ʻia me nā hōʻailona, ​​ʻo ia hoʻi, hiki ke waiho ʻia ʻo Z a me TZ.No ka laʻana, Q235-AF 'o ia hoʻi ka Grade A paila kila.

③ ʻO ke kila kalapona no nā kumu kūikawā, e like me ke kila alahaka, ke kila moana, a me nā mea ʻē aʻe, hoʻohana maʻamau i ke ʻano hōʻike o ke kila structural carbon, akā ua hoʻohui ʻia ka leka e hōʻike ana i ke kumu ma ka hope o ka helu kila.

Mea hoʻolauna

ʻeleʻele C≤ Mn Si≤ P≤ S≤ Al≥ V Nb Ti
maʻiʻo 0.2 1.0-1.6 0.55 0.035 0.035 0.015 0.02-0.15 0.015-0.06 0.02-0.2

 

ʻO nā waiwai mechanical o Q345C penei (%):

Helu kuhikuhi waiwai mechanical Elongation(%) ʻO ka mahana hoʻāʻo 0 ℃ Ka ikaika uʻi MPa Lae hua MPa≥
waiwai δ5≥22 J≥34 σb(470-650) σs(324-259)

Aia ka mānoanoa o ka pā ma waena o 16-35mm, σs≥325Mpa;i ka wā o ka pā mānoanoa ma waena o 35-50mm, σs≥295Mpa

2. Nā hiʻohiʻona welding o ke kila Q345
2.1 Ka helu ʻana o ke kalapona like (Ceq)

Ceq=C+Mn/6+Ni/15+Cu/15+Cr/5+Mo/5+V/5

E helu i ka Ceq = 0.49%, ʻoi aku ka nui ma mua o 0.45%, hiki ke ʻike ʻia ʻaʻole maikaʻi loa ka hana kuʻi ʻana o ke kila Q345, a pono e hoʻokumu ʻia nā ʻenehana koʻikoʻi i ka wā welding.

2.2 Hiki mai nā pilikia ma ke kila Q345 i ka wā wili
2.2.1 ʻO ke ʻano paʻakikī i ka ʻāpana wela

I ka wā o ka wili a me ka hoʻoluʻu ʻana o ke kila Q345, ua maʻalahi ka hoʻokumu ʻia ʻana o ka martensite i hoʻopau ʻia i loko o ka wahi i hoʻopilikia ʻia i ka wela, kahi e hoʻonui ai i ka paʻakikī a hoʻemi i ka plasticity o ka wahi kokoke-seam.ʻO ka hopena he māwae ma hope o ka wili.

2.2.2 Ka naʻau māwae anu
ʻO nā māwae kuʻihao o ke kila Q345 he mau māwae anu.


Ka manawa hoʻouna: Mar-20-2023

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