Q345C heerkulka hoose ee tuubada birta meel dhab ah
Dhumucda darbiga dhumucda mm elongation δ 5 ≥% dhalid xoog δ S (MPA ≥) heerkulka tijaabada ℃
Q345A ≤ 16 21 345 looma baahna
Q345B ≤16 21 345 20
Q345C 16-35 22 ≥325 0
Fasalka C Si Mn PSV NB Al Ti
Q345A ≤0.20 ≤0.55 ≤1.70 ≤0.045 ≤0.045 0.02-0.15 0.015-0.060 0.02-0.20
Q345B ≤0.20 ≤0.55 ≤1.70 ≤0.040 ≤0.040 0.02-0.15 0.015-0.060 0.02-0.20
Q345C ≤0.20 ≤0.55 ≤1.70 ≤0.035 ≤0.035 0.02-0.15 0.015-0.060 ≥0.015 0.02-0.20
Inta badan waxaa sabab u ah kaarboonka iyo manganese ka kooban ee kala duwan:
Q235-A
Kaarboonka C: 0.14 ~ 0.22; Mn: 0.30 ~ 0.65;
Q235-B
Kaarboonka C: 0.12 ~ 0.20; Mn: 0.30 ~ 0.70;
Waxaa lagu dabaqaa qaybaha carburized ama cyanide ee leh shuruudaha xoogga hoose ee asaasiga ah, sida usha jiid, usha isku xirka, jillaab, boodh, usheeda dhexe iyo alxanka
Waa in la xaddidaa heerkulka!
Gaar ahaan Q345E. Tobanaan darajo ayaa ka hooseeya eber.
Intaa waxaa dheer, marka la barbardhigo heerkii hore, shuruudaha ugu cad ee heerka cusub waa in la hagaajiyo nuxurka Mn ee birta laga bilaabo 1.0-1.60 ilaa ≤ 1.70, lana tirtiro xadka ugu yar ee qiimaha ≥ 1.0.
Q345C Dhuumaha birta waa mid ka mid ah maaddooyinka birta.
Q345A, Q345B, Q345C, Q345D iyo Q345E waa darajooyinka tayada. Waxay ka koraan a ilaa e, inta badan ay sabab u tahay kala duwanaanshaha heerkulka saamaynta ay sababto waxyaabaha kala duwan ee curiyeyaasha micro sida fosfooraska iyo baaruud, taas oo ka dhigan farqiga u heerkulka saamaynta iyo sifooyinka farsamo ee Halabuurka kiimikada tuubada.
Q345A, wax saameyn ah ma leh; Q345B, 20 ° saamaynta heerkulka caadiga ah; Q345C, saamaynta heerka 0; Q345D, waa - saamaynta 20 darajo; Q345E waa - saamaynta 40 darajo. Heerkulka saamaynta kala duwan, qiyamka saamayntu sidoo kale way kala duwan yihiin.
Q xoogga wax-soo-saarku kama hooseeyo 345mp, iyo heerka tayada ayaa tilmaamaya in ay ku jiraan walxo wasakh ah (carbon, manganese, silicon, sulfur iyo fosfooraska). Miyuu yahay cadadka wasakhda (cutubyada) ee birta. Marka dambe ee A, B, C iyo D, waxa yaraanaya waxa wasakhaysan
Q345A waxay ka kooban tahay fosfooraska iyo baaruudka labadaba wax ka yar ama la mid ah 0.045%
Q345B waxay ka kooban tahay fosfooraska iyo baaruudka labadaba wax ka yar ama la mid ah 0.040%
Q345C waxay ka kooban tahay fosfooraska iyo baaruudka labadaba wax ka yar ama la mid ah 0.035%
Q345D wuxuu ka kooban yahay fosfooraska iyo baaruudka labadaba wax ka yar ama la mid ah 0.030%
Q345E ayaa ka kooban fosfooraska iyo baaruudka labadaba wax ka yar ama la mid ah 0.025%
Inta badan ee fosfooraska iyo baaruudda wasakhaysan ee birta ku jira, way ka sii xumaanaysaa adkaanta saamaynta
Q345A
Q345B Akv aan ka yarayn 34 at 20 ℃
Q345C 0 ℃, Akv waa inuusan ka yarayn 34
Q345D - Akv aan ka yarayn 34 at 20 ℃
Q345E - 40 ℃, Akv kama yara 27
Sababta kama dambaysta ah waa in yaraynta wasakhda P iyo s ee birta ay kor u qaaddo hagaajinta adkaanta saamaynta heerkulka hooseeya. Mid waa kiimikaad ka kooban Q345 kan kalena waa sifooyinka farsamada ee Q345
C≤0.2%,Mn 1.0-1.6%,
Si ≤0.55%,
S ≤0.35%,
P ≤0.35%,
V 0.02-0.15%,
Nb 0.015-0.06%,
Ti 0.02-0.2%,
AL ≥0.015%
Sifooyinka farsamada waa:
Xoogga wax-soosaarka: ≥ 345mpa ( dhumucdiisuna waxay ka hooseysaa 16mm)
Xoog xajin: 470-630mpa
Kordhinta: 22%
Tamarta saamaynta: ≥ 34j (heerkulka tijaabada 0 °)
180 ° foorarsiga tijaabada:
D = 2A ( dhumucdiisuna ka hooseyso 16mm)
Xoogga wax-soosaarka: ≥ 345mpa ( dhumucdiisuna waxay ka hooseysaa 16mm)
Xoog xajin: 470-630mpa
Kordhinta: 22%
Tamarta saamaynta: ≥ 34j (heerkulka tijaabada 0 °)
180 ° foorarsiga tijaabada:
D = 2A ( dhumucdiisuna ka hooseyso 16mm)
