Adopted to metallographic method, the reason of fracture of the pulling pole of steel during straightening was analyzed.
采用金相法分析了钢拉杆校直出现断裂的原因。
The CCT curves of pipeline steel X80 were drawn by adopting dilatometer and metallographic method, and the effects of cooling rates on microstructure and hardness of the steel were studied.
采用热膨胀法和金相法相结合测绘管线钢x 80的CCT曲线，并研究冷却速率对组织和硬度的影响规律。
The changings of decarburization thickness were investigated by metallographic method. Then verified the accuracy of experimental datas in theory, and analyzed the protective mechanism of coating.
应用金相法考察了试样脱碳层深度的变化，从理论上初步验证了实验数据的准确性，并合理地分析了涂料的保护机理。
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