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连杆是柴油机的重要零件,在工作过程中承受周期性的交变载荷,因此不仅要求选用优质钢材,而且必须在工艺上控制锻件的纤维组织和黑皮的光洁度,以保证其机械性能特别是疲劳强度的提高,根据技术条件,锻件应符合下列技术要求:1.材料化学成份应符合45号钢的规定;2.锻件毛坯不许有裂纹、发痕、折迭、毛刺、缺肉等缺陷;
Connecting rod is an important part of diesel engine, in the course of its work to withstand the cyclical alternating loads, not only requires the selection of high-quality steel, and must control the forging of the fibrous tissue and black leather finish to ensure that its mechanical properties, especially Fatigue strength, according to technical conditions, forgings should meet the following technical requirements: 1. The chemical composition of the material should be consistent with the provisions of 45 steel; 2 blank forgings shall not crack, hair marks, folding, burrs, missing meat and other defects;