A Study of Microstructure Properties of AISI D2 Tool Steel in Partial Re-Melting Method
Due to the growing demand for cold-work tool steel in various industrial applications, it is crucial to improve the fabrication technique, because complex shapes involve an extensive and costly workshop effort. Hence, a one-step net-shaping process, such as the semi-solid forming, could offer great benefits. With the aim of finding a minimum process chain for the manufacturing of a high-quality production, the microstructural evolution of the ledeburitic AISI D2 tool steel in the semi-solid-state was studied experimentally via the Direct Partial Re-Melting Method (DPRM). Samples were heated in an argon atmosphere up to 1255°C, which corresponded to about 16% of liquid fraction, and held for 0 minute. The microstructural observation after DPRM showed that the equiaxed austenite grains are observable within a small liquid matrix. The microstructure also contains primary, non-dissolved carbides with a new, precipitated eutectic.
Mohd Jailani Mohd Nor, Bashir Mohamad Bali Mohamad, Mariana Yusoff et al.
M.N. Mohammed et al., "A Study of Microstructure Properties of AISI D2 Tool Steel in Partial Re-Melting Method", Applied Mechanics and Materials, Vol. 699, pp. 76-80, 2015