2024-04-23 16:00:46 评论： 点击：
The influence of chemical element content in double-sided submerged arc welded spiral steel pipes on the steel pipe is manifested as the higher the carbon content, the higher the hardness of the steel in the steel plate, and the poorer its plasticity and toughness. P and S are harmful impurities in steel, among which steel with high P content is prone to brittle cracking during high temperature pressure processing, commonly referred to as thermal brittleness. S can significantly reduce the plasticity and toughness of steel, which is more severe at low temperatures
双面埋弧焊接螺旋钢管中的化学元素含量对钢管的影响表现为含碳量越高，钢板中钢的硬度越高，它的可塑性和韧性就越差。P和S是钢中的有害杂物，其中P含量较高的钢在高温进行压力加工时，容易脆裂，通常叫作热脆性。S能使钢的可塑性及韧性明显下降，这种特性在低温下更为严重，这种现象叫作冷脆性。
在生产双面埋弧焊接螺旋钢管使用的优越的钢中，P和S要求较为严格，但从另一方面看，在低碳钢中含有较高的P和S，能使其切削易断，对改善钢的可切削性是有利的。
双面埋弧焊接螺旋钢管钢板中的锰能提高钢的强度，能消弱其不利杂质的影响，并能提高钢的淬透性，含锰量很高的高合金钢（高锰钢），具有良好的耐磨性和其它的物理性能。
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