Residual Stress and Microstructure Characterization of 34CrMo4 Steel Modified by Shot Peening.

34CrMo4 steel is widely used for drill stem in oil exploration, because of its excellent properties, such as favorable hardenability, shock absorption, less tendency of temper brittleness, and eminent wear resistance. In this study, the main works are residual stress test and microstructure characterization of 34CrMo4 steel upon various shot peening treatments. The residual stress distribution with effect depth was studied upon the shot peening.

Microstructure and corrosion resistance of Ni-based alloy laser coatings with nanosize CeO addition.

Micron-size Ni-base alloy (NBA) powders were mixed with both 1.5 wt.% (hereinafter %) micron-size CeO (-CeO) and also 1.