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Metallurgy
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beam surface
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beam blank surface defect
工字梁坯表面缺陷
electron-
beam surface
hardening
电子束表面淬火
(【技】电子束热处理工艺的一种。用高能量密度的电子束直接照射到工件上,在极短的时间内使工件表面加热到淬火温度,然后移开电子束热源,依靠工件的自激冷造成表面硬化。)
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