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首页> 外文期刊>Materials at High Temperatures >A comparative analysis of metallurgical and mechanical properties of friction welded and post weld heat treated (oil quenched) duplex stainless steel joints
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A comparative analysis of metallurgical and mechanical properties of friction welded and post weld heat treated (oil quenched) duplex stainless steel joints

机译：摩尔焊接焊接冶金与机械性能的比较分析及焊接焊接热处理（油淬火）双相不锈钢接头

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摘要

The effects of post weld heat treatment (PWHT) and oil quenching on the metallurgical and mechanical properties of the duplex (UNS 531803) welded joints were evaluated at three different temperatures namely 1080, 1150 and 1200 degrees C. The microstructural variation, austenite/ferrite phase changes, grain size measurements and microhardness aspects of the welded joint were observed. The fraction of ferrite and austenite phases was equivalent at 1150 degrees C. Nickel element was more efficient in controlling the twin phase balance. Finer grain structure was achieved at 1150 degrees C due to recrystallization effect. Twin phase presence and absence of precipitates were confirmed through XRD and TEM which followed Kurdjumov-Sachs relationship. At a heating pressure of 40 MPa, heating time of 4 s, an upsetting pressure of 80 MPa, and an upsetting time of 2 s during a PWHT at 1150 degrees C, a 50/50 balance between the duplex phases, fine grains, and increased microhardness were obtained.
机译：在三种不同的温度下评估焊接焊接热处理（PWHT）和油淬火对双相（UNS 531803）焊接接头的冶金和力学性能的影响，即1080,1150和1200摄氏度。微观结构变化，奥氏体/铁氧体 观察到焊接关节的晶粒尺寸测量和微硬度方面。 铁氧体和奥氏体相的级分在1150℃下等同物。镍元素在控制双相平衡方面更有效。 由于重结晶作用，在1150℃下实现更细粒结构。 通过Xurdjumov-Sachs关系，通过XRD和TEM确认双相存在和不存在沉淀物。 在40MPa的加热压力下，加热时间为4 s，80MPa的镦粗压力，以及在1150℃下的pWht期间的镦慢时间为2 s，双相阶段之间的50/50平衡，细粒 获得了增加的微硬度。

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