表面粗糙度对照表中心线平均粗糙度Ra（μm）Ra值范围100a50a25a12.5a6.3a3.2a1.6a0.8a0.4a0.2a0.1a0.05a0.025a0.012a＞40-80＞20-40＞10-20＞5-10＞2.5-5＞1.25-2.5＞0.63-1.25＞0.32-0.63＞0.16-0.32＞0.08-0.16＞0.04-0.08＞0.02-0.04＞0.01-0.02＜0.01十点平均最大粗糙度英制粗糙表面光洁三角标粗糙度RzRmax=Ry度度记400z100z以上100z50z25z12.5z6.3z3.2z1.6z0.8z0.4z0.2z0.1z400s100s以上100s50s25s12.5s6.3s3.2s1.6s0.8s0.4s0.2s0.1s2000100050025012563321684210.512345671011121314N12N11N10N9N8N7N6N5N4N3N2N1N标记
