This inventor holds 2 USPTO granted patents. Top assignees: Korea Institute of Industrial Technology, Woojin Osk Corporation. Active years: 1997-2021.
Company Filing History:
1 out of 316 
1 out of 2 Years Active: 1997-2021
Title: Joong-Hwan Jun: Innovator in Tool Steel and Alloy Steel Technologies
Introduction
Joong-Hwan Jun is a prominent inventor based in Seoul, South Korea. He has made significant contributions to the field of materials science, particularly in the development of advanced tool steels and alloy steels. With a total of 2 patents to his name, his work has garnered attention for its innovative approaches to enhancing material properties.
Latest Patents
One of Joong-Hwan Jun's latest patents is for a tool steel that boasts both strength and high impact toughness. This tool steel composition includes 0.7 to 0.9 wt % of carbon, 0.4 to 0.6 wt % of silicon, 0.4 to 0.6 wt % of manganese, 7.0 to 9.0 wt % of chromium, 1.5 to 2.5 wt % of molybdenum, and up to 1.0 wt % or less of vanadium, along with 0.01 to 0.06 wt % of cerium. The remainder consists of iron and inevitable impurities. This innovative tool steel achieves a hardness of 59 to 65 HRC and an impact toughness of 30 to 42 J/cm, providing super-high strength combined with high impact toughness due to the inclusion of cerium.
Another notable patent is for an Fe-Mn vibration damping alloy steel. This alloy features a mixture structure of epsilon, alpha prime, and gamma phases. The composition consists of iron and manganese in amounts ranging from 10 to 24% by weight, along with limited impurities. The manufacturing process involves preparing an ingot at temperatures between 1000°C to 1300°C for 12 to 40 hours, followed by hot-rolling to produce a rolled alloy bar or plate. The alloy undergoes solid solution treatment at temperatures of 900°C to 1100°C for 30 to 60 minutes, followed by cooling and cold rolling.
Career Highlights
Joong-Hwan Jun has worked with notable organizations such as the Korea Institute of Industrial Technology and Woojin Osk Corporation. His experience in these institutions has allowed him to refine his expertise in material development and innovation.
Collaborations
Throughout his career, Joong-Hwan Jun has collaborated with esteemed colleagues, including Man-Eob