<strong>Points for Attention in Rough Rolling Process Control</strong>
Keyword：rough rolling, mill rolls Desicription：This article lists the key items in the process control of the rough rolling process. Rough rolling operators must firmly grasp and implement carefully. 1. Precautions for width control The rough rolling stand should ensure the normal input of the short-stroke function of the side press and the vertical roll. Width […]
<strong>How to control the rolling force to optimize the rolling process?</strong>
Keyword：rolling force, rolling process, mill rolls Controlling rolling forces during rolling is critical to ensuring high-quality finished products and preventing equipment damage. Here are some ways to control rolling force: Adjust rolling speed Increasing the rolling speed can reduce the rolling force, and decreasing the rolling speed can increase the rolling force. Therefore, adjusting the […]
<strong>A Brief Introduction to Casting and Application of High Chromium Cast Iron Roll</strong>
Abstract: This article briefly describes the casting and heat treatment process of high chromium cast iron rolls, and analyzes the problems that are easy to occur during use. High chromium cast iron rolls have been widely used in the front frame of hot-rolled wide-band steel finishing mills and some small bar and section steel finishing […]
Q&A for forged steel cold rolled work rolls (4)
Describe the working principle of magnetic particle inspection. Answer: Use a magnetic field to locally magnetize the roll, and magnetic flux leakage will occur at the position where the roll has cracks. The magnetic powder coated on the roll surface will gather at the crack, so that the crack on the roll surface can be […]
Q&A for forged steel cold rolled work rolls (3)
What are the quality problems that often occur in mill roll grinding? How to eliminate them? Defect Cause Elimination method Straight waveform (polygonal) ① The grinding wheel is blunt and slippery and repaired in time; ② The grinding wheel is unbalanced and the dressing is not good; ③ Grinding machine spindle or bearing damage; ④ […]
Q&A for forged steel cold rolled work rolls(2)
What testing content is required in the mill roll manufacturing process? During the manufacturing process, the rolls have to undergo multiple cold and hot processing processes, and the inspections involved include: 1) Mechanical dimension, shape and position tolerance inspection and surface quality inspection of each machining process; 2) Flaw detection, including ultrasonic flaw detection, including […]
Q&A for forged steel cold rolled work rolls(1)
What are the commonly used materials for roll manufacturing? How is it classified? The Chinese national standard GB/T13314 <General Technical Conditions for Forged Steel Cold-rolled Work Rolls> lists 7 common cold-rolled roll materials. In recent years, Chinese roll manufacturing enterprises have formed a new material series after long-term development and accumulation. Cold roll materials are […]
<strong>Analysis of the Causes of Spalling of Hot Continuous Rolling Back-up Rolls</strong>
Abstract: This paper makes an in-depth analysis of the spalled pieces and “shoulder” on the side of the roll side of the 1422 hot continuous rolling back-up roll in a steel plant. The results show that work hardening, uneven wear, contact fatigue, unreasonable design of roll side chamfer and defects in the working layer are […]
<strong>Progress of manufacturing technology on large forged steel backup rolls and future development</strong>
Abstract: With the upgrading of the rolling technology and rolling mills， higher quality requirements for rolled products，and application of semi-high-speed steel & high-speed steel work rolls ( intermediate rolls ) ， the demands for rolling performance of backup rolls become more rigorous. In this paper，the status of the backup roll manufacturing technology was described，the development […]
<strong>Birth and development of centrifugal composite rolling mill rolls</strong>
When human beings created the rolling mill, there were rolls. The early rolls were integrally cast with sand molds, and metal mold casting was invented later. Roll manufacturing technology took a leap forward when rolls were poured with tangential gates from the bottom of the mold. With the development of the steel rolling industry, steel […]