您好,欢迎访问无锡大地薄板有限公司!

方管、圆管

厂家直销更实惠

规格全 库存多

值得您信赖

全国咨询热线

139-6172-8888

无锡大地薄板有限公司

联系我们

地址:无锡市钱桥溪南开发区钱胡路553号

咨询热线:

0510-83207888

139-6172-8888

分析方管表面缺陷的五种检测方法

发布时间:2019-04-21人气:95
北京市场方管价格小幅跟涨价格或报稳为主方管北京市场方管价格小幅跟涨。今日原料钢坯以及带钢价格一早就出现拉涨,受此带动,北京市场方管价格小幅跟涨,涨幅20元。但据贸易商反馈,今日是“五一”小长假前的最后一 天交易日,市场总体成交不畅,终端采购放慢采购计划,个别公司已经放假。因此总体来看,市场有价无市,五一期间没有期货的指导,价格或报…

方管表面缺陷的检测方法,主要有以下五种:一电涡流检测.电涡流检测有多种形式,常用的有常规涡流检测、远场涡流检测、多频涡流检测和脉冲涡流检测等,利用电涡流传感器对金属进行感应,方管表面不同缺陷类型和形状将产生不同类型的信号。其优点是检测精度高、探测灵敏度高,检测速度快,能检测待检测管材的表面及亚表面,且不受待检测方管表面油污等杂质的影响。缺点是易将非缺陷结构判定为缺陷,误检率较高,检测分辨率不容易调整。

There are five main methods to detect the surface defects of square tubes: one is eddy current testing. Eddy current testing has many forms, such as conventional eddy current testing, far-field eddy current testing, multi-frequency eddy current testing and pulse eddy current testing. Using eddy current sensors to induce metal, different types and shapes of defects on square tubes surface will produce different types of signals. It has the advantages of high detection accuracy, high detection sensitivity, fast detection speed, can detect the surface and sub-surface of the pipe to be tested, and is not affected by the impurities such as oil contamination on the surface of the square pipe to be tested. The disadvantage is that it is easy to judge the non-defective structure as a defect, the false detection rate is high, and the detection resolution is not easy to adjust. 二超声波检测

Two-Ultrasound Detection

利用超声波进入物体遇到缺陷时,一部分声波会产生反射,发射和接收器可对反射波进行分析,就能异常精确地测出缺陷来。超声波检测常用于锻件检测,检测探伤灵敏度高,但是不易检查形状复杂的管材,要求被检查的方管表面有一定光洁度,并需有耦合剂充填满探头和被检查表面之间的空隙。

When ultrasound enters an object and encounters a defect, a part of the acoustic wave will produce reflection. The transmitter and receiver can analyze the reflected wave, and the defect can be detected abnormally and accurately. Ultrasound detection is often used for forging detection, which has high detection sensitivity, but it is not easy to inspect the pipe with complex shape. It requires that the surface of the inspected square pipe should have a certain degree of smoothness, and the coupling agent should be used to fill the gap between the probe and the inspected surface.

三磁粉法检测

Detection by three magnetic powder method

磁粉法检测的原理是在方管材料中实现磁场,根据缺陷处的漏磁场与磁粉的相互作用,当表面和近表面有不连续或缺陷时,则在不连续处或缺陷处磁力线发生局部畸变产生磁极。其优点是设备投资少,可靠性高,具有直观性。缺点是操作成本高,不能对缺陷准确分类,检测速度较低。

The principle of magnetic particle method is to realize magnetic field in square tube material. According to the interaction between leakage magnetic field at defect and magnetic particle, when there is discontinuity or defect on surface or near surface, the magnetic line at discontinuity or defect will distort locally to produce magnetic pole. Its advantages are less investment in equipment, high reliability and intuition. The disadvantage is that the operation cost is high, the defect can not be accurately classified, and the detection speed is low.

四红外线检测

Four Infrared Detection

通过高频感应线圈,在方管表面产生感应电流,感应电流会导致缺陷区域消耗更多电能,引起局部温度升高,通过红外线检测局部温度,从而确定缺陷深度。红外线检测一般用于平直表面的缺陷检测,不适合检测表面不平整金属。

Through high frequency induction coil, induction current is generated on the surface of square tube. Induction current will cause more electric energy to be consumed in defect area, causing local temperature to rise. The defect depth can be determined by infrared detection of local temperature. Infrared detection is generally used for flattening surface defect detection, not suitable for detecting surface irregularity metal.

五漏磁检测

Five magnetic flux leakage detection

方管的漏磁检测方法和磁粉检测方法非常相似,适用范围、灵敏度和可靠性较磁粉检测方法更强。

The magnetic flux leakage testing method of square tube is very similar to that of magnetic powder testing method, and its application scope, sensitivity and reliability are stronger than that of magnetic powder testing method.

泰安方管市价随行偏弱厂家走量回款为主方管泰安方管市价随行偏弱。市场方面,今日螺纹钢期货2005合约尾盘跳水,最高3522最低3483,尾盘收3485跌37,仓量276万手,增0.4万手。原料带钢 145mm系主稳,2家出清日产;355mm系列与昨变动不大,现货裸价主流3350-3390,期货3330-3360左右;河北主导管厂现方管4寸 (3.75mm)出厂报价在3930-4090之间,现唐山当地方管市场价3830… 无锡镀锌方管市场价格暂稳厂家保持观望心态…方管无锡镀锌方管市场价格暂稳。今日上游原材料价格以及河北地区管厂出厂价格均报稳。目前无锡地区镀锌方管价格暂稳,出货情况比较稳定。据当地方管厂家反映,本周内价格有小幅上调, 出货量较上周有轻微好转,但需求仍然偏弱。方管厂家对后市保持观望心态。库存方面维持进出平衡,按需补货,操作谨慎。整体来看,预计短期内无锡…
辛苦整理!转载请注明来自 http://www.wxddfg.com/show.asp?id=56

你觉得这篇【分析方管表面缺陷的五种检测方法】文章怎么样?

0 0
网友评论

管理员

该内容暂无评论

美国网友
查看更多 >>

推荐新闻

上海方管市场价格或稳中趋强报价小幅探涨方管上海市场方管价格小幅上涨,今日早盘开市,期货维持强势运行态势,方管市场报价小幅探涨。从市场了反应,受昨日尾盘期货带动影响,市场 低价资源消失报价上行。库存压力有所缓解,方管厂家信心有所好转。原材料方面:5日早… 上海方管市场价格跌30元厂家都想多出点货方管上海方管市场价格跌30元。市场方面:方管厂家出货情况不佳,近期库存压力加大。因此方管厂家出现主动减产释放库存压力,目前正值方管厂家冬储管坯之际,方管厂家挺价意愿较强,方管厂家方面采购 管坯的积极性不强,对明年年…