relaxation of steel

The microstructure evolvement of bainite under different relaxation time after deformation in austenite for microalloyed steel was studied by applying thermo-simulation test, metallographic analysis, semi-quantitative measurement and PTA technique.

利用热模拟、金相分析结合半定量测量统计及径迹显微照相技术（PTA），研究了微合金钢奥氏体区变形后弛豫不同时间的贝氏体组织演化情况。

Low relaxation Stabilizing of Steel Wire on Lead tempering Unit with Ordinary Pot

普通铅锅回火机组上钢丝的低松弛稳定化处理

The method to measure the stress state on surface of material was introduced, and the state as well as the thermal relaxation behavior of residual stress for cross weld of low carbon steel was investigated.

介绍了材料表面应力状态的X射线测量方法，研究了低碳钢交叉焊缝残余应力状态及其热松弛行为。

It is also indicated that the main influencing factors of the prestressing loss of prestressed members at high temperature are the relaxation and creep of prestressed steel cable, the thermal creep of concrete and the thermal expansion difference between steel cable and concrete.

受高温作用的预应力构件产生附加预应力损失的主要因素有高温作用下预应力钢筋的松弛和蠕变、混凝土的高温徐变和钢筋与混凝土的热膨胀差。

The variation of hardness and precipitation behavior during aging at 525 ℃ after relaxation in deformed Nb-bearing microalloyed steel were studied by thermo-simulation test, metallographic analysis, measurement of hardness and TEM.

采用热模拟手段、金相及硬度测量并结合透射电子显微镜观察，研究了简单成分的含Nb微合金钢在热变形弛豫后、525℃时效时硬度变化及析出过程。