Excavator is widely used in mining machinery, civil engineering, hydraulic engineering and municipal engineering, bucket teeth are the key parts in an excavator. Bucket teeth in operation, often in direct contact with the rock, sand, mineral and other serious wear, thetooth of large consumption. Bucket teeth usuallyadoptcasting. Forging bucket tooth in recent years, to make up these defects casting bucket tooth, has excellent comprehensive mechanical properties of forging bucket tooth, the service life of up to 2 times more than the casttooth. Based the bucket and mechanical tooth tissueproperties and operating conditions on analysis of theforging bucket tooth, suitable for the production of low alloy steels 40Cr and 42CrMo steel, the following aspects were studied: the 40Cr steel low alloy experiment, presents a study of heat forging process ofthe part, part of heat forging process not only elimination of the strip propertiesafter forging organization, which has compared with the traditional forging cooling after subsequent heat treatment on mechanical properties,the same at the same time, italso directly utilizing the residual forging heat for the subsequent heat treatment,avoiding the re heatingcontinued heat treatment after forging, significantly saving energy, in line with the trend of the current global "low carbon economy". For 42CrMo low alloy steel byexperiment, "zero heat preservation"quenchingexperiments. Heat treatment process for this "zero heat preservation" quenching, show differenttissue samples and surface makes the heart, heart tissue sorbite high toughness, surface microstructure of high wear-resistanttempered martensite, so as to achieve the optimum wear resistance and toughness. For42CrMo low alloy steel in the experiment, the conventional quenching, tempering inthe temperature range of 430 ℃ -510 ℃, and observed by metallurgical microscope metallography, hardness testhardness experiments,effects on the microstructure and mechanical properties of low alloy steel of tempering temperature, consider asking the bucket teeth of miningconditions and the performance, so as to determine theappropriate heat treatment temperature is 430 ℃, thetemperature of the tempering hardness is higher, and theimpact energycan reach the performance requirements of the bucket tooth.