Study on the Welding of Feeder Hopper and Cylinder Instead of Casting Process

2014 ◽  
Vol 599-601 ◽  
pp. 486-488
Author(s):  
Yun Qiang Liu ◽  
Yong Lv
Keyword(s):  
Rational Design ◽  
Cast Steel ◽  
Cooling Water ◽  
Welding Process ◽  
Casting Process ◽  
Double Cone ◽  
Deformation Control ◽  
Technology Process ◽  
Alternative Materials ◽  
Twin Screw

According to the specific structure of the hopper and cylinder of twin screw cone feeder machine, 16MnR and austenitic hopper and machine cylinder and stainless steel 1Cr18Ni9 are used for construction by welding process instead of cast steel ZG310-570 galvanized originally. The weld technology process is formulated. In the process of implementation of the program, the difficulties of the process as follows are solved: Selection the alternative materials; rational design of cooling water structures; form and position tolerances between double cone screw and inner sphere – conical surface, reduction of the difficulty of processing the double cone cambered, welding deformation control, post - weld heat treatment of removal residual stresses.

scholarly journals Reduction of CO2 Emissions in Steelmaking by Means of Utilization of Steel Plant Waste Heat to Stabilize Seasonal Cooling Water Temperature

2021 ◽  
Vol 13 (11) ◽  
pp. 5957
Author(s):  
Tomas Mauder ◽  
Michal Brezina
Keyword(s):  
Continuous Casting ◽  
Water Temperature ◽  
Co2 Emissions ◽  
Waste Heat ◽  
Cooling Water ◽  
Main Idea ◽  
Casting Process ◽  
Spray Cooling ◽  
Steel Plant ◽  
Cooling Water Temperature

Production of overall CO2 emissions has exhibited a significant reduction in almost every industry in the last decades. The steelmaking industry is still one of the most significant producers of CO2 emissions worldwide. The processes and facilities used at steel plants, such as the blast furnace and the electric arc furnace, generate a large amount of waste heat, which can be recovered and meaningfully used. Another way to reduce CO2 emissions is to reduce the number of low-quality steel products which, due to poor final quality, need to be scrapped. Steel product quality is strongly dependent on the continuous casting process where the molten steel is converted into solid semifinished products such as slabs, blooms, or billets. It was observed that the crack formation can be affected by the water cooling temperature used for spray cooling which varies during the year. Therefore, a proper determination of the cooling water temperature can prevent the occurrence of steel defects. The main idea is based on the utilization of the waste heat inside the steel plant for preheating the cooling water used for spray cooling in the Continuous Casting (CC) process in terms of water temperature stabilization. This approach can improve the quality of steel and contribute to the reduction of greenhouse gas emissions. The results show that, in the case of billet casting, a reduction in the cooling water consumption can be also reached. The presented tools for achieving these goals are based on laboratory experiments and on advanced numerical simulations of the casting process.

Research of Transverse Corner Crack and Optimization of Concasting Process for Bloom of Peritectic Steel Q235D

2011 ◽  
Vol 284-286 ◽  
pp. 1115-1119
Author(s):  
Cheng Gong Yao ◽  
Shou Qian Yuan ◽  
Lie Chen ◽  
Zhi Jun Wang ◽  
Hai Long Wang ◽  
...  
Keyword(s):  
Crack Formation ◽  
Cooling Water ◽  
Casting Process ◽  
Electromagnetic Stirring ◽  
Continuous Casting Process ◽  
Steel Composition ◽  
Corner Crack ◽  
Peritectic Steel ◽  
Casting Production

Q235D is one kind of peritectic steel, so the casting production inevitably encounter the universality defects of peritectic steel casting. The bloom(250mm×280mm) of Q235D is produced by 60t consteel EBT—LF(VD)—CC process at Xining Special Steel. The main problem in the production is the transverse corner crack, finally lead to occur the cracks and “triangular gaps” at surface of round bar（Φ130mm）after rolled. In order to eliminate the defects caused by transverse corner crack of bloom, the morphology and microstructure and principle of crack formation is researched. The results showed that the crack is caused by stress along the intergranular, and no obvious segregation and particles founded around the defects. The following parameters on the continuous casting process are optimized: steel composition, superheat, the choice of a various slag, the cooling water of different section, casting speed and the electromagnetic stirring parameters. Finally the cracking defects of the bloom is eliminated, and the quality of the bar is optimized.

scholarly journals Microstructure Examinations in Corners of the Low-Carbon Steel Slabs from Continuos Caster Machine

2016 ◽  
Vol 61 (4) ◽  
pp. 2051-2056 ◽  
Author(s):  
G. Kwinta ◽  
S. Kara ◽  
B. Kalandyk ◽  
R. Zapała ◽  
P. Pałka
Keyword(s):  
Surface Defects ◽  
Cast Steel ◽  
Continuous Process ◽  
Low Carbon Steel ◽  
Casting Process ◽  
American Petroleum Institute ◽  
Test Material ◽  
Low Carbon ◽  
Destructive Testing ◽  
Gaseous Fuels

Abstract The exposed selvedge layers in slabs cast by the continuous process should be free from surface defects, which in most cases appear in the form of cracks on the casting surface and run to its interior. In addition to the parameters of the casting process, the occurrence of such defects depends on the chemical composition of cast steel, on the segregation of surface active elements and formation of the precipitates of carbides, nitrides and other phases. Due to the frequent occurrence of defects in corners of the slabs, non-destructive testing was performed on the mechanically cleaned surfaces of slabs. The test material was low-carbon API(American Petroleum Institute API 5L standard) steel micro alloyed with Nb and Ti designed for the production of pipes to handle gas, oil and other liquid and gaseous fuels. Despite the use of different methods of inspection, i.e. ultrasonic, magnetic particle and penetrant, cracks were not traced in the examined material. Then, from the corners of the examined slabs, specimens were cut out for metallographic examinations. The main purpose of these examinations was to disclose the presence of possible cracks and micro cracks on the surfaces transversal and longitudinal to the direction of casting. At the same time, studies were conducted to establish the number and morphology of non-metallic inclusions in selvedge layers of the slab corners and axis. Additionally, hardness of the slabs was measured. The conducted studies revealed only some minor differences in the slab hardness along its axis (130 ÷ 135 HB) and in selvedge layers (120 ÷ 123 HB).

The Numerical Simulation about Second Dendrite Spacing of Low Pressure Casting Automobile Aluminum Magnesium Alloy Wheel

2011 ◽  
Vol 189-193 ◽  
pp. 2096-2102 ◽  
Author(s):  
Xin Zhao ◽  
Yan Wei Sui ◽  
Ai Hui Liu ◽  
Fei Fei Wang ◽  
Zhi Sun ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Cooling Water ◽  
Casting Process ◽  
Low Pressure ◽  
Pressure Casting ◽  
Pouring Temperature ◽  
Alloy Wheel ◽  
Preheating Temperature ◽  
Low Pressure Casting ◽  
Cooling Pipes

Using the method of numerical simulation and the AnyCasting software, the simulation for SDAS of Al-Mg alloy wheels for low pressure casting is studied. The simulation model is established and the effects of preheating temperature, melt pouring temperature and cooling water pipes on SDAS in the low pressure casting process was founded. The results show that, SDAS presents linear variation with the increase of preheating temperature and pouring temperature; opened cooling pipes make SDAS smaller. The practice of simulating casting is verified by experiments, and test results and simulation results were consistent.

Casting Process Design and Simulation of Large Cast Steel Bracket

2019 ◽  
Vol 815 ◽  
pp. 125-130
Author(s):  
Jia Ji Xiong ◽  
Fan Lin Meng ◽  
Qing Jin Liang ◽  
Chong Cao
Keyword(s):  
Process Design ◽  
Manufacturing Process ◽  
Cast Steel ◽  
Casting Process ◽  
Casting Defects ◽  
Optimization Scheme ◽  
Sand Core ◽  
Steel Cast ◽  
Simulation Results ◽  
Filling And Solidification

The casting process design of large cast steel supports is carried out, and the special integrated sand core and forged steel cast lugs are used to simplify the cavity manufacturing process. The ProCAST software was used to simulate the casting process of the stent, simulating the filling and solidification of the casting, and predicting the occurrence of defects such as shrinkage and shrinkage of the casting. According to the simulation results, the cause of the defects is analyzed, and the casting process of the stent is optimized. The simulation results show that the optimization scheme effectively reduces the casting defects and the surface of the stent is free from defects.

Welding Deformation Controlling for the Truck Rack Girder

2012 ◽  
Vol 217-219 ◽  
pp. 2125-2132
Author(s):  
Li Qin Li ◽  
Li Bin Zhao ◽  
Xi Min Liu ◽  
Da Yu Wang ◽  
Xing Wang Wen
Keyword(s):  
Process Control ◽  
Welding Process ◽  
Fixture Design ◽  
Welding Deformation ◽  
Control Technology ◽  
Deformation Control ◽  
Running Safety

This paper aims at the research on deformation control technology in truck rack girder. Welded deformation is minished through special welding fixture design and welding process control, thus to improve the size precision of the truck rack girder and ensure the running safety of the vehicle.

Qualification of Laser Welded High Performance S44660 Ferritic Stainless Steel for Condenser Tube Applications

2003 ◽  
Author(s):  
James D. Fritz ◽  
Curtis W. Kovach
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
High Performance ◽  
Sheet Material ◽  
Cooling Water ◽  
Welding Process ◽  
Gas Tungsten Arc ◽  
Critical Pitting Temperature ◽  
Gas Tungsten ◽  
Welding Processes

The laser tube welding process has for the first time been used to produce power plant steam condenser tubing in the high performance ferritic stainless steel grade UNS S44660. This material has traditionally been produced as welded tubing by the gas tungsten-arc welding process for use in seawater and other severe cooling water environments. To verify the corrosion resistance of this new product, corrosion tests have been conducted on production tubing to compare the traditional and new welding processes. The acidified ferric chloride test was used for evaluation because it is a meaningful aggressive test capable of measuring resistance to localized pitting corrosion, the most common potential failure mode for stainless steels used in cooling water environments. Pitting tests conducted over a range of temperatures produced a critical pitting temperature of 65°C for laser welded-annealed tube. This critical pitting temperature was demonstrated to be equal to that of as-produced S44660 sheet material or that of gas tungsten-arc produced tubing. The tubing met all other metallurgical and mechanical property quality requirements. When pitting did occur it exhibited no preference for initiation at welds. Thus, laser welded. high performance stainless condenser tubing should be fully capable of providing good performance in severe cooling water environments.

Prediction of the damage and fracture of cast steel containing pores

2019 ◽  
Vol 29 (1) ◽  
pp. 166-183 ◽  
Author(s):  
Huadong Yan ◽  
Hui Jin ◽  
Ruigen Yao
Keyword(s):  
Volume Fraction ◽  
Cast Steel ◽  
Damage Model ◽  
Casting Process ◽  
Clear Understanding ◽  
Offshore Platforms ◽  
Spatial Design ◽  
Damage And Fracture ◽  
Steel Castings ◽  
Airport Terminals

For spatial design freedom, steel castings are widely used in bridges, airport terminals, and offshore platforms. However, different from hot-rolling technology, casting process variables, such as the casting temperature and those related to graphite spheroidization and post-heat treatment, may cause casting defects. To improve the safety and effectiveness of steel castings, a study consisting of experiments and numerical calculations is performed to investigate the effect of pores on the damage and fracture of cast steel. The chemical composition, metallography, and tomographic imaging of cast and hot-rolled steels were compared, providing a clear understanding of cast steel at the microstructure level. In addition, a complete Gurson–Tvergaard–Needleman damage model is used to predict the ductile fracture of cast steel containing pores. Good agreement is obtained between the measured and predicted tensile curves as well as between the measured and predicted void volume fraction evolution.

Twin Roll Casting and Melt Conditioned Twin-Roll Casting of Magnesium

2008 ◽  
Vol 141-143 ◽  
pp. 195-200 ◽  
Author(s):  
Zan Bian ◽  
I. Bayandorian ◽  
H.W. Zhang ◽  
Z. Fan
Keyword(s):  
Central Line ◽  
Innovative Technology ◽  
Al Alloy ◽  
High Shear ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Technology Process ◽  
Twin Screw ◽  
Mean Size ◽  
Twin Roll

Recently, BCAST at Brunel University has developed a MCAST (melt conditioning by advanced shear technology) process for conditioning liquid metal at temperature either above or bellow the alloy liquidus using a high shear twin-screw mechanism. The MCAST process has now been combined with the twin roll casting (TRC) process to form an innovative technology, namely, the melt conditioned twin roll casting (MC-TRC) process for casting Al-alloy and Mg-alloy strips. During the MC-TRC process, liquid alloy with a specified temperature is continuously fed into the MCAST machine. By intensive shearing under the high shear rate and high intensity of turbulence, the liquid is transformed into conditioned melt with uniform temperature and composition throughout the whole volume. The conditioned melt is then fed continuously into the twin-roll caster for strip production. The experimental results show that the AZ91D MC-TRC strips with different thicknesses have fine and uniform microstructure. The strip consists of equiaxed grains with a mean size of 60-70μm. The strip displays extremely uniform grain size and composition throughout the whole cross-section. Investigation also shows that both TRC and MC-TRC processes with reduced deformation are effective to reduce the formation of defects, particularly the formation of the central line segregations.

Sign in / Sign up

Export Citation Format

Share Document