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采用氩弧局部强化可提高环槽的硬度和高温耐磨性。
Application of argon arc local strengthen can increase hardness and high-temperature wear resistance of the ring groove.
硬块。通常由于局部淬火引起钢管上某一部位硬度值远高于周围金属的硬度值。
Hard Spot. An area in the pipe with a hardness level considerably higher than that of the surrounding metal, usually due to localized quenching.
硬度是材料抵抗局部塑性形变的量度。
Hardness is a measure of the resistance to localize plastic deformation.
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