Jun Mo Lee

Title: Jun Mo Lee and High-Strength Spring Steel

Introduction

Jun Mo Lee is an inventor associated with Pohang-si, South Korea, and Posco. His patent work addresses the composition and manufacture of steel wire designed for high-strength suspension springs used in motorcycles.

Latest Patents

Lee is credited with 1 patent: “Wire rod and steel wire for high strength spring, and manufacturing method therefor.” The invention describes wire rod and steel wire intended to help suppress decarbonization and the formation of low-temperature structures during cooling.

The specified steel wire contains 0.55–0.65% carbon, 0.5–0.9% silicon, 0.3–0.8% manganese, and 0.3–0.6% chromium by weight. It also limits phosphorus, sulfur, aluminum, and nitrogen, with the balance consisting of iron and inevitable impurities. The composition must satisfy the formula 0.77 ≤ C + (1/6)Mn + (1/5)Cr + (1/24)Si ≤ 0.83, and the steel must contain at least 90% tempered martensite.

Career Highlights

Lee’s listed invention focuses on material properties relevant to spring performance and manufacturing. By defining both the alloy composition and the required microstructure, the patent sets out an approach for producing high-strength spring wire while addressing issues that can arise during cooling.

Collaborations

Lee’s listed coworkers include Seok-Hwan Choi and Myung Soo Choi. The available information identifies Posco as his company but does not specify the coworkers’ roles in the patent.

Conclusion

Jun Mo Lee’s patent presents a composition and manufacturing approach for high-strength spring steel wire, with particular attention to cooling behavior and tempered martensite structure.