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unimaster金蟲 (小有名氣)
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[交流]
關(guān)于焊接熱影響區(qū)的再結(jié)晶問題 已有2人參與
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根據(jù)再結(jié)晶的定義,再結(jié)晶應(yīng)該是針對變形組織的。為什么在鋼的焊接過程中,熱影響區(qū)再往下細分的時候,有一個區(qū)叫“再結(jié)晶區(qū)”(Recrystallized zone),一直不是很理解。。。 請問這個所謂的再結(jié)晶區(qū)組織有哪些變化和特點。 |
鐵桿木蟲 (著名寫手)
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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. |

木蟲 (正式寫手)
| 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. |
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