Man-Jin Ha

Title: Innovations by Man-Jin Ha in Stainless Steel Manufacturing

Introduction

Man-Jin Ha is a notable inventor based in Pohang-si, South Korea. He has made significant contributions to the field of materials engineering, particularly in the manufacturing of stainless steel. With a total of 3 patents to his name, his work has garnered attention for its innovative approaches and practical applications.

Latest Patents

One of Man-Jin Ha's latest patents is a method of manufacturing martensitic stainless steel sheets using a twin roll strip caster. This method involves allowing ingot steel to pass through two casting rolls that rotate in opposing directions. The process includes rolling the steel sheet at high temperatures, specifically between 1000 to 1200°C, with a draft percentage of 25 to 50% using a first roller. Subsequently, the steel sheet is rolled at a temperature of 800 to 1000°C with a draft percentage of 5 to 15% using a second roller. This innovative method enhances the efficiency and quality of stainless steel production.

Another significant patent by Ha is an apparatus designed to prevent damage to casting rolls in strip casting machines. This apparatus includes a roll pressing force detection unit that measures the force applied to the casting rolls. It also features a foreign object determination unit that assesses whether foreign objects have been introduced to the casting rolls based on the measured force. Additionally, a roll gap instruction value generation unit creates a roll gap instruction value to minimize damage from foreign objects, ensuring the longevity and effectiveness of the casting rolls.

Career Highlights

Man-Jin Ha is currently employed at Posco, a leading steel manufacturing company known for its commitment to innovation and quality. His work at Posco has allowed him to apply his inventive ideas in a practical setting, contributing to advancements in steel manufacturing processes.

Collaborations

Throughout his career, Man-Jin Ha has collaborated with several talented individuals, including Dae-Sung Lee and Seong-In Jeong. These collaborations have fostered a creative environment that encourages the development of innovative solutions in the field of materials engineering.

Conclusion

Man-Jin Ha's contributions to the field of stainless steel manufacturing through his innovative patents demonstrate his expertise and commitment to advancing technology. His work not only enhances production processes but also sets a standard for future innovations in the industry.