An experiment of repairing fatigue crack in the surface of locating jaw of big end of Engine Connecting Rod by laser cladding was accomplished.The metallographical observation,hardness testing in the laser-clad coatings,and crack detecting in the repaired area of the connecting rod were completed.The results indicate that the repaired location of the connecting rod possesses good properties and a metallurgic band was formed between coating and substrate by laser-clad powder of alloy G115 on it at proper tec...