EXPERIMENTATION IN ENHANCING WEAR RESISTANCE OF ROTAVATOR BLADES BY INCREASING CHROMIUM CONTENT

Gagandeep Sandhu, Ravinder Singh, Gagandeep Singh Dhindsa, Ramandeep Singh Deorda, Gagandeep Singh Sandhu, Ravinder Singh, Gagandeep Singh Dhindsa, Ramandeep Deorda
2016 International Journal of Engineering Science Invention Research & Development   unpublished
Rotavator blades are subjected to extreme abrasive wear when it cuts pulverizes mixes and level the soil in single pass, which severely affects its working life. The objective of this study was to enhance the life of the rotavator blade made of EN-42J spring steel by means of hard facing. Two types of iron-based hard facing electrodes with range of Chromium (12.5-28.8% by weight) were used to deposit on the rotavator blade. Two different hard facings namely H-12.5Cr and H-28.8Cr were deposited
more » ... 8Cr were deposited by manual metal arc welding (MMAW) on rotavator blade. Pin-On-Disc (ASTM G99) test was done for the hard faced and un-hard faced samples of rotavator blades to calculate wear rate. The results showed that the hard faced EN-42J has shown comparatively high wear protection as compared to un-hard faced EN-42J. The wear rate was minimum in case of H-28.8Cr hard facing. The H-28.8Cr-EN-42J hard facing-substrate combination showed maximum wear protection. The test result showed that the wear rate of the un-hard faced blade was 1.679 gm/hr, while those of the H-28.8Cr and H-12.5Cr hard facing alloys were 0.112 and 0.239 gm/hr respectively.
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