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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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unimaster

金虫 (小有名气)

[交流] 关于焊接热影响区的再结晶问题 已有2人参与

根据再结晶的定义,再结晶应该是针对变形组织的。为什么在钢的焊接过程中,热影响区再往下细分的时候,有一个区叫“再结晶区”(Recrystallized zone),一直不是很理解。。。
请问这个所谓的再结晶区组织有哪些变化和特点。
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leeyl

铁杆木虫 (著名写手)

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aishan(金币+1): 感谢专家解答 2011-08-05 19:33:59
Partially austenitic regions
At a sufficiently large distance from the fusion boundary, the peak temperature
is suchl ow that the steel cannot transform completely to austenite.The small amount of austenite that does form has a larger carbon concentration.This is because the solubility of carbon in austenite, which is in equilibrium with ferrite, increases as the temperature decreases. The subsequent transformation behaviour of this enriched austenite is then quite different, since it has a higher hardenability.
道法自然
2楼2011-08-04 13:24:03
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weekend.ba

木虫 (正式写手)

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aishan(金币+1): 感谢交流 2011-08-05 19:35:00
The recystallized zone in HAZ means the fine-grained zone undergone phase transformation. This zone experiences temperature higher than Ac3 but not so much to cause grain growth. Consequently, during cooling process it transforms form austenite to fine grained ferrite.
3楼2011-08-04 16:38:03
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