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42—1 下图中1、2两条曲线表示的是低碳钢和高强钢的应力——变形曲线的形状。请指出哪一条是低碳钢。其次是从下列词语中选出,并用代号回答A、A＇、B、c、C＇、D、D＇、G、G＇各表示什么? 词语:(1)拉伸强度 (2)下屈服点 (3)(标称)应力 (4)屈服强度 (5)断裂点 (6)弹性极限 (7)延伸率 (8)上屈服点 (9)比例极限 (10)实际应力 42—2 请在下文中正确的项号上划个○,不正确的项号上打个×。 (1)焊接堆高,不包括在有效焊缝厚度之内。 (2)垫板不包括在焊缝厚度之内,所以用什么材质均可。 (3)如果控制焊接变形,残余应力也会
42-1 The two curves 1 and 2 in the figure below show the shape of the stress-strain curve of mild steel and high-strength steel. Please indicate which one is mild steel. Second, choose from the following words, and use the code to answer A, A ’, B, c, C’, D, D ’, G, G’ each what? Words: (1) Tensile strength Point (3) (Nominal) Stress (4) Yield Strength (5) Break Point (6) Elastic Limit (7) Elongation (8) Upper Yield Point (9) Proportional Limit (10) Actual Stress 42-2 Please under The correct item number on the paper zoned ○, the correct item number to play a ×. (1) The weld stack height is not included in the effective weld seam thickness. (2) The pad is not included in the thickness of the weld, so what material can be used. (3) Residual stress can also be controlled if welding is controlled