Massive ferrite belts were observed in a low Cr-Mo steel multilayer weldment, which consisted of numerous massive ferrite lath blocks (200 μm × 200 μm × 800 μm). The massive ferrite lath blocks were brittle, which initiated and provided a path to propagate cleavage cracking and reduced the steel weldment toughness significantly. In the low Cr-Mo steel multilayer weldment, local low toughness regions were caused by the massive ferrite belts.

中文翻译：

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大量铁素体导致低Cr-Mo钢焊缝的韧性降低

在低Cr-Mo钢的焊接件的多层，其中包括许多块状铁素体板条的块（200观察到块状铁素体带μ米×200 μ米×800 μ M）。大块的铁素体板条块很脆，这引发并提供了传播解理裂纹的途径，并显着降低了钢焊件的韧性。在低Cr-Mo钢多层焊件中，局部低韧性区域是由块状铁素体带引起的。