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Showing results for tags 'hardness'.
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Hello! First, I'm quite fascinated with the art. Second, I have an idea that I need opinions on. So, I'd appreciate if someone could share your thoughts. There is a Leeb hardness test, and i have an idea to make a tool for quick determination of hardness and thus identifying material if for some reason that is not known. i would like to know if anyone can tell me if there are any streamline tools to determine hardness (apart from file or Rockwell test). And most important if that is something that smiths would be interested in that? I know that the question is vague, but let's say one can determine hardness in few seconds with high enough precision to determine the material. I'd appreciate any opinion. Cheers!
Team, I just acquired a 300lb block of steel about 2 1/2 inches thick. Only slightly dents with small ball peen hammer. Should I try case hardening or leave it alone? Suckered tings like a bell and has great bounce back already.
Rhino anvils are now made in America, near Spokane, WA. Their composition is a "nickel chrome" alloy, (nickel/chrome/molybdenum/manganese/carbon) used for making rock crusher liners. It's a very tough air-hardening steel, which allows the hardness to be HRC 52 all the way through.
Dear Sirs, I am working in closed-die steel forging company. Nowadays, we have problem about the production of connection rod Details are as follows: Forging Equipment: 6300 mkg Lasco Counterblow hammer Raw Mateial: SAE 4140 Forging Temperature:~ 950-1000 C 1st question: What must be the hardnees value as forged in air cooled condition? For the heat treatment, First, the part was austenized at about ~880 C during 40 minutes and quenched in 90 C oil bath. Then tempering was performed at about ~ 550 C during 1 hour. After heat treatment; Surface Hardness was 34 HRC => This is OK We have cut a tensile test sample from the body of the part as being perpendicular to the forging direction.The section that we have taken test sample was 20 mm and the diameter of the gage length region after turning was 10 mm. When we performed tensile testing; Tensile Strength was 1100 MPa => This is OK( the range of this value must be between 1000 to 1150 MPa) Yield Strength was 513 MPA=> This is not OK. This value must be greater than 650 MPa 2nd question :Can anyone has a suggestion to provide yield strength greater than 650 MPa without causing deviation of tensile strength from the tolerance range 1000 to 1150 MPa ? Attached the picture of finished connecting rod and drawing of tensile test specimen are available. Thanks for your assist in advance. Regards, Schmieden