Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userThe Study of Effect of Cooling System Parameters on High Chromium Cast Iron Roll Fire Fatigue Utilized in Hot Steel Rolling
دراسة تأثير بارامترات نظام التبريد على التعب الحراري لدرافيل حديد الزهر العالي الكروم المستخدم في درفلة الفولاذ على الساخن
1464
0 26
0
(
0
)
Authors
عمار العيد( باحث )
Created by
Shamra Editor
Ask ChatGPT about the research
تم في هذا العمل تطوير نموذج حاسوبي يعتمد على طريقة الفروق المنتهية لحساب درجات الحرارة السطحية و كذلك حساب الإجهادات-الانفعالات الحرارية السطحية للدرفيل من أجل بارامترات مختلفة لنظام تبريد لدرفيل من حديد الصب العالي الكروم, و دراسة تأثير كل بارامتر على ظاهرة التعب الحراري في هذا الدرفيل.
In this work a computer model based on finite difference method is developed to calculate the temperatures and thermal stresses/strains within the roll under various cooling system parameters for High Chromium Cast Iron Roll, and study of the effect of each parameter on thermal Fatigue phenomena in this roll.
References used
Stevens PG, Ivens KP, Harper P. Increasing work roll life by improved roll-cooling practice. Journal of Iron and Steel Institute 1971;209:1–11
Kumar K.Mukerjee, A Critical Review of The Mechanics of Metal Rolling, Its Application to The Design of Hot Strip Mills, thesis submitted for degree of Master of Engineering, 1973.p124
Martin, H., Heat and mass transfer between impinging gas jets and solid surfaces, Advanced Heat Transfer, vol. 13, pp.1-60, 1977
rate research
Read More
Aluminum Alloy 6063 is used widely in extrusion industry for
building and automobile applications. Aluminum billet is
manufactured usually by vertical continuous casting technique and direct water cooling. 5 different casting temperatures 660, 680,
700, 720, 740Cº, besides 5 different casting speeds 100, 112, 125, 138, 150 mm/min to control cool water feeding are chosen. It has noticed that the increase of casting temperature and decreasing of casting speed has a good effect on improving billet quality which contribute later on improving the hardness and mechanical properties of extruded aluminum profiles.
This paper presents a study aimed at improving the performance of the machine, hot steel rolling, and make them conform to international standards, where the study includes two phases: the first includes mathematical modeling and simulation programmi
ng language with a rolling machine. The second phase will include the development and testing of alternative control systems.
I tested the validity of this model through analyzes of performance curves derived from simulated and compared with the values of the curves and tables station real taken from the HSRMP. Through ensure this form to the parameters of the system characteristic variables representing the performance of the real station, this makes it a useful tool allows simulation of plant performance, explain the behavior of variables The test cases in addition to the possibility of change work and operating strategies to improve the overall operation. From this model performed the initial analysis, which proved the possibility of improving the performance of the station to implement the following modifications:
• Reduce the value of hard integrative models associated with the rings are positioned in the final stage.
• unification of all evil ratios for nutrition workshops.
• Revolving transfer is located in the last phase .
Note: HSRMP ( Hot strip rolling Mill plant ) .
This paper aims at studying the influence of gangue aiid researching in the
theoretical empirical methods in order to limit the formation of such gangue
during the manufacture of steel. Gangues are divided to acids, sulfate and
compound gangue. Su
ch gangues are known for their bad influence on the
mechanical characteristics of steel. Experiments have proved that the
influence of Sulfur gangue especially FeS is worse than that of acids, as the
melting point is 880t. Such gangue form capillary ducts within steel, thus
there will be internal micro cleaves and stress points that will lead to
collapse and break when the metal is exposed to stress less than the flowing
point which is considered within the allowed stress values.
This paper deals with computer simulation methods when constructing the
equipment in iron rolling mill plants for dimensioning machines, which have become more
important in the recent years. And it determines the ideal prerequisites to simulate dri
ving
system for electrical and mechanical subsystems. The drive systems is built around several
components which have their own technology and multiple time-scales: electrical
machines, power semiconductor, control circuits from the firing sequences to the different
regulators. This requires the simulation of both the electrical and mechanical components
in one model. The use of a uniform simulation program offers the possibility to combine in
mechanical modeling with the electrical necessities. This research will be in the description
of the simulation-aided design and its relationship with vibration caused by the twisting
torque using the drive systems.
In this work, the performance of batch electrocoagulation (EC) treatment using iron electrodes with
monopolar configuration for trivalent chromium (Cr3+) removal from a synthetic wastewater was
investigated. The influences of current density (from
2 to 25 mA/cm2) and initial metal concentration
(from 50 to 250 mg/L) on the removal efficiency were explored in a batch stirred cell to determine the
best experimental conditions.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
