我们还对铸渗质量较好的铸渗试件进行了观察和分析，发现铸铁渗铬合金层与母材结合良好，呈冶金结合。

By observing and analyzing the casting test piece, we have found a metallurgical integrating layer that is made up of chromizing cast-iron alloy layer.

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用超声疲劳试验装置对Q235B母材及焊接接头试件进行超声疲劳试验，研究其在超高周疲劳寿命区间的疲劳性能。

Ultrasonic fatigue tests were carried out on Q235B base metal and welded joints by an ultrasonic fatigue test equipment in order to investigate their super high cycle fatigue properties.

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焊后试件的性能测试结果表明，焊接接头的拉伸强度、断面收缩率、延伸率及冲击韧性均已超过母材。

The results of performance measurement test show that tensile-strength, contraction of cross sectional area, elongation percentage, dynamic ductility of the weld all exceed their base metal.

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