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如前所述,目前我国生产的冷凝器和热交换器用铜管和铜合金管(以下简称铜管)主要质量问题有二个:其一是耐腐蚀性能差,主要是脱锌严重,引起铜管使用寿命不长;其二是铜管应力集中较严重,这主要是退火不当造成,上述二点虽属铜管质量的主要矛盾,但不属本文的范围,在此我们就不谈及了。下面我们只谈一谈我们对于铜管涡流探伤标准的几点意见,供同志们讨论时参考。
As mentioned above, at present, China’s production of the condenser and heat exchanger with brass and copper alloy tube (hereinafter referred to as the copper tube) There are two main quality problems: First, poor corrosion resistance, mainly dezincification is serious, causing copper The service life of the pipe is not long; the other is the stress concentration of the copper pipe is more serious, which is mainly caused by improper annealing. Although the above two points are the main contradictions of the copper pipe quality, it is beyond the scope of this article, and we will not talk about it . Below we only talk about our editorial standards for eddy current copper for comments, for your reference when discussing.