Study of Carbon and Nitrogen Precipitates in Hard Face Carbides
[1]YANG Ke,YU Shengfu,TAO Panfeng,et al.Study of Carbon and Nitrogen Precipitates in Hard Face Carbides[J].Journal of Zhengzhou University (Engineering Science),2009,30(01):57-60.
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
30卷
Number of periods:
2009 01
Page number:
57-60
Column:
Public date:
1900-01-01
- Title:
- Study of Carbon and Nitrogen Precipitates in Hard Face Carbides
- Keywords:
- carbonitrides; precipitates; Hard face carbide
- CLC:
- -
- DOI:
- -
- Abstract:
- Hard carbide is obtained by using the developed nitrogen alloy self-protecting hard surface flux cored welding wire on low carbon steel plate. Nb and Ti are added to the hard face alloy as the most efficient carbon-nitrogen alloying elements. The morphology and composition of carbonitride precipitates in hard-sided carbides were studied by optical microscope, scanning electron microscopy and electron probe, and thermodynamic analysis was carried out, and the effects of carbon-nitrogen precipitates on tissues were discussed. The results show that the carbon and nitrogen precipitates in the hard face alloy are MX(M=alloying elements, X=C, N) composite carbonitrides distributed on grain boundaries and dislocations, and have different quantities and sizes under welded state and heat treatment conditions. Primary carbon-nitrogen precipitates are formed during the solidification process of the weld and have a large size; The fine secondary carbon and nitrogen precipitates can be dispersed and precipitated in large quantities after overlay welding heat treatment, which has obvious hardening effect on the matrix. The precipitation of carbon and nitrogen in hard-sided alloy is distributed along dislocation and grain boundary dispersion, which inhibits the formation of Cr-rich precipitated phase and improves the corrosion resistance of grain boundaries.
- References:
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- Similar References:
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Last Update:
1900-01-01