Microstructure Formation and Fracturing Characteristics of Grey Cast Iron Repaired Using Laser

Microstructure Formation and Fracturing Characteristics of Grey Cast Iron Repaired Using Laser

The repairing technology based on laser rapid fusion is becoming an important tool for fixing grey cast iron equipment efficiently. A laser repairing protocol was developed using Fe-based alloy powders as material. The microstructure and fracturing feature of the repaired zone (RZ) were analyzed. Th...

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Main Authors: Peng Yi, Pengyun Xu, Changfeng Fan, Guanghui Yang, Dan Liu, Yongjun Shi
Format: Article
Language:English
Published: Hindawi Limited 2014-01-01
Series:The Scientific World Journal
Online Access:http://dx.doi.org/10.1155/2014/541569
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spelling doaj-c633e693db93499eb25e0d627bafb2672020-11-25T00:40:29ZengHindawi LimitedThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/541569541569Microstructure Formation and Fracturing Characteristics of Grey Cast Iron Repaired Using LaserPeng Yi0Pengyun Xu1Changfeng Fan2Guanghui Yang3Dan Liu4Yongjun Shi5College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao 266580, ChinaThe repairing technology based on laser rapid fusion is becoming an important tool for fixing grey cast iron equipment efficiently. A laser repairing protocol was developed using Fe-based alloy powders as material. The microstructure and fracturing feature of the repaired zone (RZ) were analyzed. The results showed that regionally organized RZ with good density and reliable metallurgical bond can be achieved by laser repairing. At the bottom of RZ, dendrites existed in similar direction and extended to the secondary RZ, making the grains grow extensively with inheritance with isometric grains closer to the surface substrate. The strength of the grey cast iron base material was maintained by laser repairing. The base material and RZ were combined with robust strength and fracture resistance. The prevention and deflection of cracking process were analyzed using a cracking process model and showed that the overall crack toughness of the materials increased.http://dx.doi.org/10.1155/2014/541569
collection DOAJ
language English
format Article
sources DOAJ
author Peng Yi
Pengyun Xu
Changfeng Fan
Guanghui Yang
Dan Liu
Yongjun Shi
spellingShingle Peng Yi
Pengyun Xu
Changfeng Fan
Guanghui Yang
Dan Liu
Yongjun Shi
Microstructure Formation and Fracturing Characteristics of Grey Cast Iron Repaired Using Laser
The Scientific World Journal
author_facet Peng Yi
Pengyun Xu
Changfeng Fan
Guanghui Yang
Dan Liu
Yongjun Shi
author_sort Peng Yi
title Microstructure Formation and Fracturing Characteristics of Grey Cast Iron Repaired Using Laser
title_short Microstructure Formation and Fracturing Characteristics of Grey Cast Iron Repaired Using Laser
title_full Microstructure Formation and Fracturing Characteristics of Grey Cast Iron Repaired Using Laser
title_fullStr Microstructure Formation and Fracturing Characteristics of Grey Cast Iron Repaired Using Laser
title_full_unstemmed Microstructure Formation and Fracturing Characteristics of Grey Cast Iron Repaired Using Laser
title_sort microstructure formation and fracturing characteristics of grey cast iron repaired using laser
publisher Hindawi Limited
series The Scientific World Journal
issn 2356-6140
1537-744X
publishDate 2014-01-01
description The repairing technology based on laser rapid fusion is becoming an important tool for fixing grey cast iron equipment efficiently. A laser repairing protocol was developed using Fe-based alloy powders as material. The microstructure and fracturing feature of the repaired zone (RZ) were analyzed. The results showed that regionally organized RZ with good density and reliable metallurgical bond can be achieved by laser repairing. At the bottom of RZ, dendrites existed in similar direction and extended to the secondary RZ, making the grains grow extensively with inheritance with isometric grains closer to the surface substrate. The strength of the grey cast iron base material was maintained by laser repairing. The base material and RZ were combined with robust strength and fracture resistance. The prevention and deflection of cracking process were analyzed using a cracking process model and showed that the overall crack toughness of the materials increased.
url http://dx.doi.org/10.1155/2014/541569
work_keys_str_mv AT pengyi microstructureformationandfracturingcharacteristicsofgreycastironrepairedusinglaser
AT pengyunxu microstructureformationandfracturingcharacteristicsofgreycastironrepairedusinglaser
AT changfengfan microstructureformationandfracturingcharacteristicsofgreycastironrepairedusinglaser
AT guanghuiyang microstructureformationandfracturingcharacteristicsofgreycastironrepairedusinglaser
AT danliu microstructureformationandfracturingcharacteristicsofgreycastironrepairedusinglaser
AT yongjunshi microstructureformationandfracturingcharacteristicsofgreycastironrepairedusinglaser
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