Bucket tooth with high-chromium abrasion-proof cast iron

Chinese invention patent CN1041551 also disclose a kind of dredger dredge bucket tooth be with high-chromium abrasion-proof cast iron do crown, low alloy steel is done the tooth handle, with the bimetal bucket tooth that the method for electroslag casting is processed, its technological process is: electroslag is molten into liquid state in crucible; Pour mold into; After the comsumable melt as crown is over, continued preheating one minute, when the top layer that is preheating to dummy electrode bucket tooth handle is in melted state; With the bucket tooth handle in the mold that the bucket tooth shape is arranged that is full of molten metal; Insert the founding that realizes the bimetal composite bucket tooth down fast, through normalizing in 960 ℃ * 2 hours, tempering in 260 ℃ * 2 hours formed then.Chinese invention patent CN1410192 also discloses the wear-resistant bucket tooth of bimetal electroslag casting method of manufacture in groups, and its bucket tooth is made up of the tooth handle and the crown of differing materials, and ME is that the side with the tooth handle is the bond face; The also upwards stack according to tooth handle workplace front end of multilayer opposite opened water mold is done consumable electrode with rich chromium cast iron, and an electroslag casting goes out a plurality of crowns with regard to founding; Simultaneously, be integral the low-carbon alloy steel of respective amount or manganese steel tooth handle are molten, form one group of bucket tooth crowd; Then, cut into bucket tooth one by one with the conduction cutting facility, the bucket tooth that adopts this invention to produce is of fine quality; The crown metal purity of electroslag casting is high, scarce limits such as dense structure, nothing pine are dredged, slag inclusion, layering, and resistance to abrasion is superior to the foundry goods or the forging of homogeneity; The shock resistance of tooth handle, bending fatigue strength height are convenient to operation, and energy consumption is low; Production efficiency is high, and material use efficiency is high.Adopt the electroslag casting method to make composite bucket tooth, key coat intensity is low, and is easy to crack in the use, peel off.Chinese invention patent CN85100983 has also invented a kind of improvement technology of excavator bucket teeth; This invention is from improving the bucket tooth shape; According to through cutting down unnecessary denticle volume as far as possible, thereby reduce the thought of excavating resistance, proposed a kind of new prong.This kind prong mainly is made up of the land plate and the plate intermediary one reinforcement gusset of a double curvature arch shape; Test of long duration through excavating iron ore, frozen soil shows; This kind bucket tooth excavating resistance is little, than general wedge shape bucket tooth with material, have the life-span long, work efficiency is high, advantage such as energy-conservation.

Chinese invention patent CN1664256 also discloses a kind of improvement of the assemblies of teeth of earth moving machines, wherein on dipper teeth, has outstanding clinch, and said clinch can be connected on the cooperation base of scraper bowl braces; Comprise that also one is used for the transverse base of pin; It is characterized in that the clinch of said dipper teeth edge and lower edge in the top has the stepped appearance guide rail, and be connected with the contiguous sections of widening and obtain reinforcement effect; And combine by the conjugate profile of said stepped appearance guide rail and the widened section in the said scraper bowl braces body and the inner process adjacency section that is arranged at least one said clinch; And can in the corresponding straight guide of scraper bowl braces, guide, after installing, can keep from the rear nullifying; This pin is arranged in a vertical pin base of scraper bowl braces body, the slightly crooked and inclination of this base.The dipper teeth assembly of this invention can apply to the handling machinery and the excavation machinery of multiple kind and model usually, and can apply to more widely in all navvys.

But deficiencies such as the present various wear-resistant cast steel bucket tooth ubiquity hardness of developing are low, wear no resistance and work-ing life is short.In order to improve the bucket tooth life-span, do not reducing under the flexible prerequisite, improve its hardness and be very important.