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首頁(yè) > 無損檢測(cè)儀器 > 鐵素體含量測(cè)定儀 > 鐵素體分析儀FMP30 -篤摯儀器（上海）有限公司
鐵素體分析儀FMP30 -篤摯儀器（上海）有限公司
鐵素體分析儀FMP30 -篤摯儀器（上海）有限公司 鐵素體分析儀FMP30 -篤摯儀器（上海）有限公司 鐵素體分析儀FMP30 -篤摯儀器（上海）有限公司

  • 鐵素體分析儀FMP30 -篤摯儀器（上海）有限公司

  • 產(chǎn)品編號(hào) : FMP30
  • FeritScope FMP30根據(jù)磁感應(yīng)方法測(cè)量奧氏體鋼和雙相鋼中的鐵素體含量?？梢詼y(cè)量奧氏體覆層、不銹鋼管道、容器和鍋爐焊縫內(nèi)以及奧氏體鋼或雙相鋼制造的其他產(chǎn)品內(nèi)的鐵素體含量。
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奧氏體不銹鋼焊縫中δ鐵素體的存在會(huì)影響焊縫的強(qiáng)韌性、耐腐蝕性及焊接性,工程現(xiàn)場(chǎng)的焊接過程通常借助鐵素體含量測(cè)定儀來控制δ鐵素體的含量。化工設(shè)備和石油加工廠通常要承受高溫、高壓，同時(shí)要耐腐蝕。外部環(huán)境要求所用鋼材即使在高溫下也要有足夠的耐腐蝕和耐酸性能。如果鐵素體含量太低，焊縫受熱后容易產(chǎn)生裂紋；如果鐵素體含量太高，焊縫將喪失韌性和延展性。對(duì)于雙相鋼，如果鐵素體含量太低，焊縫受到張力或發(fā)生振動(dòng)時(shí)容易破裂。 FeritScope FMP30根據(jù)磁感應(yīng)方法測(cè)量奧氏體鋼和雙相鋼中的鐵素體含量。儀器能識(shí)別所有的磁性部件，也就是說，除了delta鐵素體，還能識(shí)別其轉(zhuǎn)化形式馬氏體。儀器符合Basler標(biāo)準(zhǔn)和DIN 32514-1標(biāo)準(zhǔn)，適合于現(xiàn)場(chǎng)檢測(cè)，可以測(cè)量奧氏體覆層、不銹鋼管道、容器和鍋爐焊縫內(nèi)以及奧氏體鋼或雙相鋼制造的其他產(chǎn)品內(nèi)的鐵素體含量

Chemical, energy and processing plants are often subjectto heat, aggressive media and high pressure. Thesecircumstances demand steel with high corrosion and acid resistance that are resilient even at high temperatures.If the ferrite content is too low, then the weldedmaterial is susceptible to hot-cracking, if the ferrite contentis too high, the toughness, ductility as well as thecorrosion resistance of the steel are reduced. For duplexsteel, a ferrite deficit in the area of the weld seam resultsin stress corrosion cracking and reduction in strength.


The FERITSCOPE FMP30 measures the ferrite content in austenitic and duplex steel according to the magnetic induction method. All magnetisable structure sections are measured i. e., in addition to deltaferrite also strain-induced martensite, for example, or other ferritic phases. It is suited for measurements according to the Basler- Standard and according to DIN EN ISO 17655. Areas of application are onsite measurements, e. g. of austenitic platings as well as weld seams in stainless steel pipes, containers, boilers or other products made of austenitic or duplex steel.


Duplex steel is used increasingly in the chemical and petrochemical industries, e. g., for boilers and pipelines. A ferrite deficit in the weld seam area leads to strength reduction, an excess ferrite content to a reduction in toughness and ductility. In particular when welding duplex steel, the ferrite content in the welding area can easily assume unfavourable values either due to unsuitable welding filler materials or through poor heat input or heat removal. Only an onsite measurement can provide the assurance that the processing did not change the optimum ferrite content in an unfavourable manner at the expense of mechanical or corrosion-resistance properties.

FERITSCOPE FMP30 依據(jù)磁感應(yīng)方法進(jìn)行測(cè)量。線圈產(chǎn)生的磁場(chǎng)區(qū)域與工件內(nèi)的磁性部件相互作用，磁場(chǎng)區(qū)域的變化在第二個(gè)線圈內(nèi)產(chǎn)生感生電壓，該電壓與鐵素體含量成比例關(guān)系，然后評(píng)估該電壓。所有的磁性部件，也就是說，除了delta鐵素體，還包括其轉(zhuǎn)

化形式馬氏體都能被識(shí)別。采用磁感應(yīng)方法測(cè)量鐵素體含量有個(gè)特別的優(yōu)勢(shì)，sigma相即Fe-Cr沉積，由于鐵素體含量過高和冷卻條件不對(duì)而形成，被準(zhǔn)確地識(shí)別為非鐵素體。另一方面，在做金相切片試驗(yàn)時(shí)，要從鐵素體組織中區(qū)別出sigma相是非常不容易的，這將導(dǎo)致鐵素體含量的錯(cuò)誤評(píng)估。

化學(xué)和石油化工行業(yè)越來越多地使用雙相鋼，例如：圖1和圖2中的鍋爐容器就是用高防腐性能的雙相不銹鋼制造的。如果焊縫處的鐵素體含量過低，受到張力或發(fā)生振動(dòng)時(shí)容易破裂。然而，在焊接雙相鋼時(shí)，由于焊接添加劑或熱處理不當(dāng)，焊縫處的鐵素體含量非常容易超標(biāo)。只有現(xiàn)場(chǎng)檢測(cè)才能確保處理過程不會(huì)改變*佳的鐵素體含量，防止機(jī)械性能或防腐蝕性能的下降。


焊縫中鐵素體含量的測(cè)量

圖為：焊縫中鐵素體含量的測(cè)量


Simple and quick measurements

（簡(jiǎn)單快速地測(cè)量）
It is easy to measure the ferrite content accurately whenusing the FERITSCOPE FMP30. Upon probe placementon the surface of the specimen, the reading is displayedautomatically and stored in the instrument. The probecan also be placed onto hard to reach areas. For suchapplications, the instrument features an “external start”function to trigger the measurements with the push ofa button. This is ideal for measurements in pipes, boreholes or grooves.

Calibration / Standards

（校準(zhǔn)/校準(zhǔn)片）
To obtain comparable measurement results, the instrumentsmust be adjusted or calibrated using standards that can be traced to internationally recognised secondary standards. For this purpose, the IIW (International Institute of Welding, UK) developed secondary standards that have been determined by the TWI (The Welding Institute, UK) according to the method described in DIN EN ISO 8249 and ANSI/AWS A4.2. Helmut Fischer offers certified calibration standard sets that are traceable to the TWI secondary standards for corrective and master calibrations. The standards of the FISCHER calibration standard sets list in addition to the ferrite numbers FN also the % Fe values. Influences including the shape of the part to be measured (strong curvature, thickness of the ferrite-containing coating, etc.) can be taken into account through corrective calibrations with customer-specific calibration standards or through correction factors (included). The normalisation and corrective calibration are stored application-specific in the respective application memory of the instrument


Magnetic induction method

（測(cè)量原理）

The FERITSCOPE FMP30 measures according to the magnetic induction method. A magnetic field generated by a coil begins to interact with the magnetic portions of the specimen. The changes in the magnetic field induce a voltage proportional to the ferrite content in a second coil. This voltage is then evaluated. All magnetic portions in the otherwise non-magnetic structure are measured, i. e., in addition to delta ferrite and other ferritic portions also strain-induced martensite, for example.
A specific advantage of the magnetic induction method for measuring the ferrite content is that a sigma phase, i. e., a Fe-Cr precipitation, which has formed due to excess ferrite content and unfavourable cooling conditions, for example, is recognised correctly as a non-ferritic structural component. In comparison, erroneous interpretation of ferrite content is likely in a metallographic section where a sigma phase is not easily distinguished from a ferritic structure.


校準(zhǔn)片

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