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  1. ibfmining1

    Cast steel Ground Engagement Tool failure after hardfacing

    With 0.7 carbon equivalent, you are definitely within zone III of the Graville diagram (attached); therefore, preheating is a must. However, I fully agree with everybody - else`s comments such as: 1. Coarse grain structure - very likely your casting / heat treatment process needs closer...
  2. ibfmining1

    Dissimilar weld on a gear wheel assembly

    Just F.Y.I , I usually develop U.T, as opposed to X-RAY by using straight beam; and 2 additional types of angle beam (45 ; 75 degree); "i.a.w" A.W.S D 1.1 Code. M.T is also developed as per A.W.S D 1.1 acceptance criteria (before and after PWHT). My gears range from 32 to 40 ft in dia. (made in...
  3. ibfmining1

    High Mn Steels

    Thank you all for the comments. 1. The application is for crushers (mantles and concaves)- weight range 1 to 3 metric tons. 2. The biggest challenge is to deal with different suppliers (each one of them has a different way to "skin the cat"). 3. We will try now 1.15% C max when 2% Cr is...
  4. ibfmining1

    High Mn Steels

    Hello ! Two Questions: 1. Many customers are now ordering min. 20% Mn for Hadfield steels, as opposed to the traditional 11%/14% as per ASTM A128. Is there any literature and/or study which explains and actually confirms a better performance for the 18/20% Mn steel? 2. For Mn Hadfield steels...
  5. ibfmining1

    High Bronze leaded alloys

    thread454-358922 dshore: Regarding your question on above thread, referred bronze alloys belong to the "Composite Mixtures" family; where the lead has basically three major functions: 1. Reduces coefficient of friction, which is an important property in the absence of lubrication (planned or...

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