A STUDY ON THE FRICTION AND WEAR ABRASIVE OF NICKEL-BASED ALLOY COATINGS FOR TILLER BLADES

摘要

This study aimed to examine the usability of utilizing the welded tiller blade in the farming. The surface treatment was experimented by applying the alloy powder welding skills on the tiller blades. The wt% of nickel-based alloy powder used on the experimental machine is C: 0.55～0.8, Cr: 14～16, Si: 3.9-4.9, Fe: 2.4～4.6, B: 3.0～3.4, Ni Balance (76.15～73.7). The efficiency of hardness on the nickel-based alloy (C-scale) is 58-63. The diameter of particle is 39-106μm, the condensation is 8.08 g/cm{sup}3, and the melting temperature is about 1405℃.There are two sets of specimens in this study, SUP-HF and SUP-F. They are spring steels (SUP-9) under the attrition of nickel-based alloy. Both medium of carbon steel and chrome steel ball rub the surfaces against the specimens in the SRV experiment. The duration of attrition for the coating and the abrasive parameter has shown that SUP-HF behaves better than SUP-F. The SUP-HF also has better reaction to the anti-oxidize function. The hardness parameter (Hv) on the coating is 691～702. The adherence after compression has a grade of A-class on the SEM chart. There is no significant difference on overall parameters for both specimens. The results have shown that the SUP-HF blades performed excellently to the sandy-loam 45ha and stone gravel soil 65ha plowing; by replacement of 168 tiller blades at the basis of same abrasives. The plowing capacity sandy and stone of SUP-HF is 2.6 larger than SUP-H respectively. The iron residues remained in the soil is less than 24,360g and 24,347g. The efficiency of the SUP-HF blades is undoubtedly confirmed.