KOERZIMAT

With the KOERZIMAT 1.097 MS, FOERSTER offers a measuring system for the precise, automatic and fast measurement of the weight-specific saturation polarisation σ_s as well as the volume-specific saturation polarisation J_s. The largely geometry-independent measurement makes it possible to examine complexly shaped samples in particular. The KOERZIMAT 1.097 MS is used, among other things, to check the degree of sintering in the hard metal sintering process and to determine the tungsten content dissolved in cobalt as well as the free iron, cobalt or nickel content in powders / hard metals. In addition, the saturation polarisation J_s in Tesla can be determined on soft magnetic circuit components.

Benefits

Magnetization Time: 0.2 seconds of pulse magnetization (200 kA/m) for the testing of hard metals, minimizing coil heating. Optional pulse magnetization: Up to 450 kA/m (upgrade module).
Advanced Measurement Module: Operates without relay technology, reducing susceptibility to failures.
Expansion: Only the current KOERZIMAT HCJ 1.097 can be expanded to the JH system, meaning a measurement module for complete J(H)/B(H) hysteresis loop for soft magnetic materials.
Software V.6.x: Compatible with touchscreen controllers, supports Win 7 / 8 / 10, offers enhanced reporting and ERP system integration.
KOERZIMAT MS Calibration: Now traceable back to PTB.

In the hard metal producing industry, magnetic parameters are used for analyzing the material’s microstructure. By measuring the coercive field strength on batch samples, it is possible to determine the grain size of the carbide quickly and non-destructively. This in turn provides inferences about the material’s resistance and hardness. For this reason, one of the prerequisites for good quality management in powder metallurgy is the ability to determine the coercive field strength with precision.

These parameters can be easily determined with the FOERSTER measuring instruments KOERZIMAT HCJ and KOERZIMAT MS.

Crack testing for carbides

When powdered metal is pressed into blanks, it can lead to cracks and changes in the microstructure, which in turn can cause the parts to burst during the sintering process. But high-performance tools such as drill bits, milling machines or lathes require the very highest quality. For this reason, FOERSTER offers the test instruments STATOGRAPH and MAGNATEST; before the sintering process, they are used to examine the blanks for cracks and microstructure fl was by means of eddy current. Volume reduction during the sintering process itself can also lead to cracks in the component – flaws that can be found and sorted out, again using eddy current.

Determination of the carbon balance

Cutting tools must be able to withstand high loads. An assessment of the carbon balance after sintering provides an important quality parameter for this. When under-carburization occurs in the sintering process, the resulting ‘eta’ phase can make the tool brittle, leading to breakage. In the case of over-carburization, the carbon precipitates out, which can result in insufficient strength and wear-resistance and, again, tool breakage.

For this reason, the KOERZIMAT MS measuring system monitors the carbon balance by comparing the actual magnetic saturation (MS) with the nominal value.

Density measurement / condition monitoring

Especially brittle materials must be completely free of defects, such as pores that reduce the material density. It is therefore important to know whether the material has been sintered to the density that is, at least in theory, achievable. For this, one takes the coercive field strength H_cJ. This parameter approaches a maximum that depends on the temperature and duration of the sintering. If the coercive field strength is too low, the density will also be less than the nominal value, indicating e.g. incomplete density sintering. For quality assurance, the KOERZIMAT HCJ measurement system can determine and monitor the coercivity on batch samples.

Determining the magnetic phase on stainless, duplex and austenitic steels

When a specific mechanical attribute is desired, one can use magnetic phases – like ferrite in duplex steels and martensite in austenitic steels – as indicators for controlling the production process. For example, a high proportion of martensite indicates brittleness and the associated risk of breakage. The KOERZIMAT MS monitors the magnetic phase after thermal treatment and cold forming. Measurement is fast and unaffected by the specimen geometry, and it requires no sample preparation beforehand.

Evaluate materials based on their magnetic properties

Benefits

Advanced demands require high-quality measurement

Crack testing for carbides

Determination of the carbon balance

Density measurement / condition monitoring

Determining the magnetic phase on stainless, duplex and austenitic steels

One solution for all applications

System for measuring the saturation polarization σ_s und J_s

System for the measurement of coercivity H_CJ, hysteresis J(H) and relative permeability µr(H)

Discover the exciting world of FOERSTER with us

Institut Dr. Foerster GmbH & Co. KG

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KOERZIMAT

Evaluate materials based on their magnetic properties

Benefits

Advanced demands require high-quality measurement

Crack testing for carbides

Determination of the carbon balance

Density measurement / condition monitoring

Determining the magnetic phase on stainless, duplex and austenitic steels

One solution for all applications

System for measuring the saturation polarization σs und Js

System for the measurement of coercivity HCJ, hysteresis J(H) and relative permeability µr(H)

Discover the exciting world of FOERSTER with us

Institut Dr. Foerster GmbH & Co. KG

Subcribe to our newsletter

System for measuring the saturation polarization σ_s und J_s

System for the measurement of coercivity H_CJ, hysteresis J(H) and relative permeability µr(H)