How to control the ferrite content in cast stainless steel?
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According to the caster, there is also some ferrite in cast stainless steel CF8
It’s similar to 304 steel plates; ferrite is present in them as well. . . Chromium is a ferrite-forming element, while nickel is an austenite-forming element. To reduce the ferrite to a level where it cannot be detected by ferrite testing instruments, it is necessary to lower the chromium equivalent/nickel equivalent ratio. . In other words, increase the nickel content. . That makes it more expensive; the cost goes up, and it’s no longer an economical choice of 18-8. . Calculation of ferrite content in austenitic stainless steel _ Chen Shixiu. This paper can be used as a reference. . He has already reviewed various ones. . What’s a Schaeffer diagram, what’s a DeLong diagram? Stainless Steel Welding Metallurgy and Weldability – this book was translated by Professor Chen Jianhong; it’s worth reading
What should be the range for the ferrite content in CF8?
For the vast majority, there is no need to require the measurement of ferrite content. . . It’s not on the nucleus anyway