到萨摩亚一定要去看看沙娃伊岛东南部海岸上的“冲天水”(Blow holes),这不可思议的风景是由于火山石的堆积而造成的。海浪在大量火山石前显得特别嚣张,咆哮着让人不敢轻易接近。
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钻孔孔壁粗糙或孔壁粗糙且有粉红圈都会导致多层结合处的空洞,称之为楔形空洞(wedge woids)或吹气孔(blow holes),"楔形空洞”最初处于结合交界面,它的名称也暗示:形状如“楔”,回缩形成空洞,通常可以被电镀层覆盖。
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Some CO gas remains in the ingot, and eventually blow holes are formed in the steel.
部分一氧化碳气体残留在钢锭内部,最终在钢中形成气泡。
There are many factors effecting on the formation of the blow holes, such as substrate surface state, alloy powder system, crystalline growth velocity, etc.
气孔形成与多方面因素有关,包括基体表面状态、冶金材料体系和结晶速度等。
The result showed that the crack forming was due to the billet metal in the subcutaneous blow holes were oxidated during heating process and could not be sticked.
结果表明:轮箍裂纹是由于钢锭中存在严重的皮下气泡,在轮箍热加工过程中皮下气泡处金属被氧化烧穿导致不能粘合而形成裂纹。
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