论文部分内容阅读
1.冲击试验结果在图纸上的表达及其相互换算各类机械产品的重要零件,一般有冲击试验的要求。图纸上常见的写法,按旧的计量单位为ak≥4kgf·m/cm~2;自贯彻法定计量单位以来,在图纸上又用aK≥39J/cm~2来表示:在标准JB755-85《压力容器锻件技术条件》中则规定冲击试验要测定冲击吸收功Ak。总之,图纸上的表示法很不统一。查阅标准GB229-84《金属夏比(U型缺口)冲击试验方法》和GB2106-80《金属夏比(V型缺口)冲
1. Impact test results on the drawings and the conversion of various types of mechanical products important parts, the general impact test requirements. Common written on the drawings, according to the old unit of measurement ak ≥ 4kgf · m / cm ~ 2; since the implementation of legal units of measurement, and again with the drawings aK ≥ 39J / cm ~ 2: In the standard JB755-85 “ Pressure vessel forgings technical conditions ”is provided in the impact test to determine the impact of absorption Ak. In short, the notation on the drawings is not uniform. Check the standard GB229-84 “metal Charpy (U notch) impact test method” and GB2106-80 "metal Charpy (V notch) red