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北京石油化工学院2026年研究生招生接收调剂公告
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lglwait

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with V as microalloying element, it is better than Ti because this steel should meet the impact testing and if V will be substituted by Ti, problems maybe arises, firstly Ti will be combined with N during solidification process,TiN particle size is so big and it is detrimental to absorbed impact energy. and the remaining Ti wil form titanium nitride druing coiling . TiC has as good precipitation hardening as VN. secondly high content of Ti is not good for casting and easily be oxided during steelmaking process.
from my experience, in order to meet the strength, Ti should be about 0.08%, but you should prescribe the Mn and C content.
Just for reference.
11楼2014-06-04 19:48:13
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thornbird703

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9楼: Originally posted by df5815 at 2014-06-04 10:11:27
我们是轧制角钢的,为感觉轧制工艺挺关键的,我们考察的一个厂子,据说Q345B把Mn控制在0.8%左右,其他成分跟我们差不多,性能还够。...

厚度,规格组矩??普通轧制或控轧?有无热处理手段??很多没说明。。?

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12楼2014-06-04 20:23:21
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cqlxf83

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学习下。
13楼2015-01-24 00:48:26
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