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首页> 外文期刊>Corrosion Engineering, Science and Technology >Carbide precipitation in HAZ of multipass welds in titanium containing and titanium free supermartensitic stainless steels Part 2 - Weld simulation studies
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Carbide precipitation in HAZ of multipass welds in titanium containing and titanium free supermartensitic stainless steels Part 2 - Weld simulation studies

机译：含钛和无钛超马氏体不锈钢多道焊缝的热影响区中的碳化物沉淀第2部分-焊接模拟研究

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摘要

Two pass weld simulation has been used to investigate the precipitation mechanism of carbides in the coarse grained heat affected zones (HAZ) of two supermartensitic stainless steels, one high grade steel containing titanium and the other medium grade alloy without titanium. Recently, a model for such carbide precipitation has been proposed. According to this model, reheating of the HAZ in the martensitic stage is needed to provoke strong carbide formation. In the present work, the peak temperatures of the first and the second heating passes, the holding time during the second (reheating) pass and the holding temperature between the two passes have been varied in order to find the most favourable conditions for carbide precipitation in the two steels. In addition, measurements of the chromium content across prior austenite grain boundaries have been made for the titanium free steel.
机译：已经使用两次焊缝模拟研究了两种超马氏体不锈钢（一种含钛的高级钢和另一种不含钛的中级合金）的粗晶粒热影响区（HAZ）中碳化物的析出机理。最近，已经提出了用于这种碳化物沉淀的模型。根据该模型，需要在马氏体阶段对热影响区进行重新加热以激发强烈的碳化物形成。在本工作中，为了找到最有利于碳化物析出的条件，改变了第一和第二加热道的峰值温度，第二（再加热）道的保持时间以及两次道之间的保持温度。这两种钢。另外，已经对不含钛的钢进行了横跨先前奥氏体晶界的铬含量的测量。

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