Q345 chinhu chesimbi.Isimbi yakaderera-alloy (C <0.2%), inoshandiswa zvakanyanya pakuvaka, mabhiriji, motokari, zvikepe, midziyo yekumanikidza, nezvimwewo Q inomiririra simba rezvibereko zvechinhu ichi, uye 345 inotevera inoreva kukosha kwezvibereko izvi. zvinhu, zvinenge 345 MPa.Uye kukosha kwegoho kuchaderera nekuwedzera kwekukora kwezvinhu.
Q345 ine yakanaka yakazara mechanicha zvivakwa, inogamuchirika yakaderera tembiricha kuita, yakanaka plasticity uye weldability, uye inoshandiswa sezvimiro, mechanika zvikamu, zvivakwa zvekuvaka, general Metal structural parts, inopisa-yakakungurutswa kana yakajairika, inogona kushandiswa muzvikamu zvakasiyana munzvimbo dzinotonhora pazasi. -40°C.
Classification
Q345 inogona kukamurwa kuita Q345A,Q345B, Q345C, Q345D, Q345E maererano giredhi.Chavanomiririra kunyanya kupisa kwekuvhunduka.
Q345A level, hapana kukanganisa;
Q345B nhanho, 20 madhigirii yakajairika tembiricha kukanganisa;
Q345C level, iri 0 dhigirii kukanganisa;
Q345D nhanho, ndeye -20 dhigirii kukanganisa;
Q345E nhanho, ndeye -40 dhigirii kukanganisa.
Pakupisa kwakasiyana-siyana kwekuvhunduka, hunhu hwekuvhunduka hwakasiyanawo.
makemikari anoumbwa
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
Q345 simbi inotsiva mhando dzekare dze12MnV, 14MnNb, 18Nb, 16MnRE, 16Mn nedzimwe mhando dzesimbi, kwete kungotsiva 16Mn simbi.Panyaya yekuumbwa kwemakemikari, 16Mn uye Q345 zvakare akasiyana.Zvinonyanya kukosha, pane musiyano mukuru muhukuru hweboka rehukuru hwesimbi mbiri maererano nemusiyano mukusimba kwegoho, uye izvi zvinozokonzera shanduko mukushushikana kunobvumirwa kwezvinhu zvine humwe hutema.Naizvozvo, hazvina kufanira kungoisa kushushikana kunobvumidzwa kwe16Mn simbi kuQ345 simbi, asi kushushikana kunobvumirwa kunofanirwa kudzokororwa zvichienderana nehukuru hutsva hweboka resimbi.
Chikamu chezvikamu zvakakosha zveQ345 simbi zvakangofanana neicho che16Mn simbi, mutsauko ndewekuti kuteedzera alloy zvinhu zveV, Ti uye Nb zvinowedzerwa.Chikamu chidiki cheV, Ti, uye Nb alloying zvinhu zvinogona kukwenenzvera zviyo, zvakanyanya kunatsiridza kuoma kwesimbi, uye zvakanyanya kunatsiridza yakazara ma mechanical zvimiro zvesimbi.Izvo zvakare nekuda kweizvi kuti ukobvu hwesimbi ndiro inogona kuitwa yakakura.Nokudaro, iyo yakazara mechanical properties yeQ345 simbi inofanira kunge iri nani kupfuura 16Mn simbi, kunyanya kushanda kwayo kwekushisa kwepasi hakusi kuwanikwa mu16Mn simbi.Iyo inobvumirwa kushushikana kweQ345 simbi yakakwira zvishoma pane iyo ye16Mn simbi.
kuenzanisa kwekuita
Q345Dpombi isina musonomechanical properties:
Tensile simba: 490-675 Goho simba: ≥345 Elongation: ≥22
Q345Bpombi isina musonomechanical properties:
Tensile simba: 490-675 Goho simba: ≥345 Elongation: ≥21
Q345A isina musono pombi michina zvivakwa:
Tensile simba: 490-675 Goho simba: ≥345 Elongation: ≥21
Q345C isina musono pombi michina zvivakwa:
Tensile simba: 490-675 Goho simba: ≥345 Elongation: ≥22
Q345E isina musono pombi michina zvivakwa:
Tensile simba: 490-675 Goho simba: ≥345 Elongation: ≥22
Product Series
Q345D simbi yakaenzaniswa neQ345A, B, C simbi.Tembiricha yekuyera tembiricha yemagetsi yakaderera.Kuita kwakanaka.Huwandu hwezvinhu zvinokuvadza P uye S hwakaderera pane hweQ345A, B uye C. Mutengo wemusika wakakwira kupfuura Q345A, B, C.
Tsanangudzo yeQ345D:
① Inoumbwa neQ + nhamba + yemhando yegiredhi chiratidzo + deoxidation nzira chiratidzo.Nhamba yaro yesimbi inotungamirirwa ne "Q", iyo inomiririra goho resimbi, uye nhamba iri shure kwayo inomiririra kukosha kwegoho reMPa.Semuenzaniso, Q235 inomiririra kabhoni structural simbi ine goho poindi (σs) ye235 MPa.
②Kana zvichidikanwa, chiratidzo chinoratidza giredhi yemhando uye deoxidation nzira inogona kuiswa kuseri kwenhamba yesimbi.Zviratidzo zvegiredhi zvemhando A, B, C, D zvakateerana.Deoxidation method chiratidzo: F zvinoreva simbi inofashaira;b zvinoreva semi-kuuraya simbi;Z zvinoreva simbi yakaurawa;TZ inoreva simbi yakaurayiwa, uye simbi yakaurayiwa haigone kuiswa nezviratidzo, kureva kuti, zvese Z neTZ zvinogona kusiiwa.Semuenzaniso, Q235-AF inoreva Giredhi A iri kufashaira simbi.
③ Carbon simbi yezvinangwa zvakakosha, senge bhiriji simbi, marine simbi, nezvimwewo, inonyanya kushandisa nzira yekutaura yecarbon structural simbi, asi vara rinoratidza chinangwa rinowedzerwa pakupera kwenhamba yesimbi.
Sumo yenyaya
| element | C≤ | Mn | Si≤ | P≤ | S≤ | Al≥ | V | Nb | Ti |
| content | 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 |
Iwo emakanika zvivakwa zveQ345C ndeaya anotevera (%):
| Mechanical properties index | Elongation(%) | Test tembiricha 0 ℃ | Tensile simba MPa | Yield point MPa≥ |
| value | δ5≥22 | J≥34 | σb (470-650) | σ (324-259) |
Kana ukobvu hwemadziro huri pakati pe16-35mm, σs≥325Mpa;apo ukobvu hwemadziro huri pakati pe35-50mm, σs≥295Mpa
2. Welding maitiro eQ345 simbi
2.1 Kuverenga kwekabhoni yakaenzana (Ceq)
Ceq=C+Mn/6+Ni/15+Cu/15+Cr/5+Mo/5+V/5
Calculate Ceq = 0.49%, yakakura kupfuura 0.45%, zvinogona kuonekwa kuti welding performance yeQ345 simbi haina kunyatsonaka, uye matanho akasimba etekinoroji anoda kuumbwa panguva yewelding.
2.2 Matambudziko anowanzo kuitika muQ345 simbi panguva yewelding
2.2.1 Kuomarara kwemaitiro munzvimbo yakakanganiswa nekupisa
Munguva yekugadzira uye kutonhora kweQ345 simbi, iyo inodzimwa chimiro-martensite inoumbwa zviri nyore munzvimbo inopisa-inopisa, iyo inowedzera kuoma uye inoderedza plastiki yenzvimbo iri pedyo-seam.Mhedzisiro ndeyekutsemuka mushure mekucheka.
2.2.2 Cold crack sensitivity
Kuputika kwesimbi kweQ345 kunonyanya kutonhora.
Nguva yekutumira: Mar-20-2023