Q345C low zafin jiki karfe bututu na gaske tabo
Girman bango kauri mm elongation δ 5 ≥%% ƙarfin yawan amfanin ƙasa δ S (MPA ≥) gwajin zafin jiki ℃
Q345A ≤ 16 21 345 ba a buƙata
Q345B ≤16 21 345 20
Q345C 16-35 22 ≥325 0
Grade 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
Musamman saboda abubuwan da ke cikin carbon da manganese daban-daban:
Q235-A
Abubuwan da ke cikin Carbon C: 0.14 ~ 0.22; Mn: 0.30 ~ 0.65;
Q235-B
Abubuwan da ke cikin Carbon C: 0.12 ~ 0.20; Mn: 0.30 ~ 0.70;
Ana amfani da shi zuwa sassan carburized ko cyanide tare da ƙananan buƙatun ƙarfin ƙarfi, kamar sandar ja, sandar haɗi, ƙugiya, ƙugiya, shaft da walƙiya.
Ya kamata a sami hani akan zafin jiki!
Musamman Q345E. Dubun digiri ƙasa da sifili.
Bugu da ƙari, idan aka kwatanta da tsohon ma'auni, mafi mahimmancin abin da ake bukata na sabon ma'auni shine daidaita abun ciki na Mn a cikin karfe daga 1.0-1.60 zuwa ≤ 1.70, da soke ƙananan ƙimar ƙimar ≥ 1.0.
Q345C karfe bututu ne daya daga cikin kayan na karfe bututu.
Q345A, Q345B, Q345C, Q345D da Q345E sune ingantattun maki. Suna haɓaka daga a zuwa e, galibi saboda bambancin yanayin zafi da ke haifar da nau'ikan abubuwan da ke cikin microelements daban-daban kamar su phosphorus da sulfur, wanda ke wakiltar bambancin yanayin tasirin tasirin da kayan aikin injin bututu.
Q345A, babu tasiri; Q345B, 20 ° tasirin zafin jiki na al'ada; Q345C, tasirin digiri 0; Q345D, shine - tasirin digiri na 20; Q345E shine - tasirin digiri 40. A yanayin zafi daban-daban na tasiri, ƙimar tasirin kuma sun bambanta.
Q ƙarfin amfanin gona bai ƙasa da 345mp ba, kuma ƙimar inganci yana nuna cewa yana ɗauke da abubuwa marasa ƙazanta (carbon, manganese, silicon, sulfur da phosphorus). Shin adadin ƙazanta (kasuwanci) a cikin ƙarfe. Daga baya A, B, C da D, ƙarancin ƙazantaccen abun ciki
Q345A ya ƙunshi duka phosphorus da sulfur ƙasa da ko daidai da 0.045%
Q345B ya ƙunshi duka phosphorus da sulfur ƙasa da ko daidai da 0.040%
Q345C ya ƙunshi duka phosphorus da sulfur ƙasa da ko daidai da 0.035%
Q345D ya ƙunshi duka phosphorus da sulfur ƙasa da ko daidai da 0.030%
Q345E ya ƙunshi duka phosphorus da sulfur ƙasa da ko daidai da 0.025%
Mafi yawan sinadarin phosphorus da sulfur a cikin ƙarfe, mafi munin tasirin tasirin
Q345A
Q345B Akv ba kasa da 34 a 20 ℃
A Q345C 0 ℃, Akv ba zai zama ƙasa da 34 ba
Q345D - Akv ba kasa da 34 a 20 ℃
A Q345E - 40 ℃, Akv bai kasa da 27 ba
Dalili na ƙarshe shi ne cewa raguwa na P da s a cikin karfe yana inganta haɓakar tasirin tasiri a ƙananan zafin jiki. Ɗaya shine sinadarai na Q345 kuma ɗayan shine kayan aikin injiniya na Q345
C≤0.2%,Mn 1.0-1.6%,
≤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%
Abubuwan injina sune:
Ƙarfin Haɓaka: ≥ 345mpa (kauri ƙasa 16mm)
Ƙarfin ƙarfi: 470-630mpa
Tsawaitawa: 22%
Ƙarfin tasiri: ≥ 34j (gwajin zazzabi 0 °)
Gwajin lanƙwasa 180 °:
D = 2A (kauri a kasa 16mm)
Ƙarfin Haɓaka: ≥ 345mpa (kauri ƙasa 16mm)
Ƙarfin ƙarfi: 470-630mpa
Tsawaitawa: 22%
Ƙarfin tasiri: ≥ 34j (gwajin zazzabi 0 °)
Gwajin lanƙwasa 180 °:
D = 2A (kauri a kasa 16mm)