Cracking occurred on automobile crankshaft which is made of 49MnVS3 Non-quenching-and-tempering free-cutting steel during operation test of the engine.

The easy-cutting non-quenched-and-tempered steel YF35MnV for car engine connecting rod is developed successfully with super-low-oxygen steel making process,which uses high-basicity slag and combination of direct and diffusion deoxidation,steady nitrogen-increasing and sulphur-increasing technique,a continuous casting process being able to control segregation of sulphur.

Contrast on the cutting forces of using YT15 carbide tool to turn the standard 45 steel and the YF45MnV non-tempered easy cutting steel;

Prediction models of austenite dynamic recrystallization of medium-carbon microalloyed steel during forging process;

In order to lower the flow stress in the cold heading process,the Bauschinger effect of microalloyed steel MFT8 for cold heading bolt was studied.

A martensitic microalloyed steel was prepared by addition of low carbon and suitable alloying elements such as Mn, Si and Cr.

Study and applications of new microalloy non-quenched-tempered steel;

Advance in Microalloying Non-Quenched-Tempered Steels for Auto;