(PDF) Study on the Complete Decarburization of Spring Steel surface decarburization characteristics and relation Rolling
 Zhang C L, Zhou L Y and Liu Y Z 2013 Surface decarburization characteristics and relation between decarburized types and heating temperatur e of spring steel 60Si2MnA Int . J. 65mn Spring Steel Wire Manufacturer China - Customized surface decarburization characteristics and relation RollingCharacteristics and application: 65 mn spring steel wire, manganese improve hardenability, phi 12 mm steel oil can be hardening, surface decarburization tend to be smaller than silicon steel, after heat treatment of the comprehensive mechanical performance is better than that of carbon steel, but there are overheating sensitivity and temper brittleness.
A REVIEW ON: EFFICIENT ENERGY OPTIMIZATION IN REHEATING FURNACES
surface and core and along the length to a desired level as low as 15 oC to 25 C. Minimizing cold spots (skid marks). Avoiding overheating and burning of metal. Minimizing scale formation, decarburization. Avoiding thermal stresses and cracks. Elimination of scratches on the bottom surface of slab/blooms/billets. A Review of Rolling Contact Fatiguecal. RCF results in metallic particles aking from the surface of the ball and rolling elements or raceways. When the bearing is properly lubricated this phenomenon commences as a crack below the surface and propagates to the surface causing a pit or a spall in the bearing raceway. The high level of cleanliness of bearing Advanced Materials Research Vol. 402 | p. 15 | Scientific.NetThe results show: (1) The surface decarburization depth distribution of heavy rail slab heated in the regenerative furnace is seriously imbalanced, and the fluctuation ranges between 30% -40%.(2) Under the same production conditions, decarburization of U75V is serious, and the average depth of U75V is more than 11% higher than the U71Mn.
Analysis of common surface defects of hot rolled steel sheet surface decarburization characteristics and relation Rolling
After rolling, it forms scars on the surface, or due to the sticky mold and convexity on the surface of the steel ingot. Defects such as bag, net pattern, heavy skin or turning skin will form scars during rolling. During the rolling process, the surface of the finished hole is scratched at a certain pass. Analysis on Surface Crack of Steel Ball(III) ---- Cold surface decarburization characteristics and relation Rolling1.Cold processing crack Macroscopic morphology characteristics and location: show linear grinding cracks and the rail crack usually along the rolling direction. Microcosmic morphology characteristics: no decarburization on the two sides of the grinding cracks, obvious burn layer on the surface, and decarburization of the rolling cracks. Bending Basics: The fundamentals of heavy bendingThe high temperature required for hot forming can cause oxidation. It can also cause surface decarburizationa change or loss in steels carbon content. Most view decarburization as a defect, because the carbon loss makes the steel less stable, which in turn can cause a variety of problems with the products made from that steel.
Decarburization - an overview | ScienceDirect Topics
Decarburization is a loss of carbon in the surface-adjacent zone of the material (Gunnarson, 1963 ). Contributing factors are high temperatures and large amounts of oxygen in the atmosphere. At higher temperatures, the diffusion rate of carbon is so large that longer annealing times lead to decarburization. Here, the carbon atoms migrate from the outer layer to the surface and oxidize there to CO or CO 2, which are volatile gases and therefore allow the carbon to escape from the surface. EP0488726A2 - Thin decarburized grain oriented silicon steel surface decarburization characteristics and relation RollingA decarburized steel sheet for a thin oriented silicon steel sheet having improved magnetic and coating characteristics and a method of producing the same. Silicon steel strip is hot-rolled, cold-rolled to a final thickness of about 0.28 mm or less, subjected to decarburization/primary-recrystallization annealing, coated with an annealing separator, and thereafter subjected to finishing annealing. EP2376666A2 - Surface decarburization-restrained steel and surface decarburization characteristics and relation RollingDecarburization-restrained steel and manufacturing method thereof are disclosed. Steel includes a boron (B)-concentrated layer formed on its surface to prevent carbon of the steel from being in contact with oxygen in atmosphere to thus restrain decarburization of the steel.
Effect of Surface Decarburization on Corrosion Behavior of surface decarburization characteristics and relation Rolling
The surface decarburization had little impact on the corrosion resistance of GH3535 alloy, only leaded to tiny increase in Cr depletion depth near the surface. 2. More M 2 C carbides were formed near the surface of decarburized alloy, which is attributed to the higher concentration of C gradient in the alloy surface. C was liberated from graphite crucible wall during the corrosion process and penetrated into the molten salt to react with metal elements. Effect of Surface Decarburization on Corrosion Behavior of surface decarburization characteristics and relation RollingThe surface decarburization had little influence on the corrosion resistance of the alloy, whereas it caused more M2C carbide formation beneath the corrosion layer. That is attributed to the higher concentration of C gradient near the alloy surface, which was resulted from the increase in C content liberated from graphite crucible wall during the corrosion process. Effects of Temperature and Oxygen surface decarburization characteristics and relation Rolling - Academia.eduAnalysis and prevention of side cracking phenomenon occurring during hot rolling of thick low-carbon steel plates By Byoungchul Hwang Influence of Carbide Morphology and Microstructure on the Kinetics of Superficial Decarburization of C-Mn Steels
Effects of Temperature and Oxygen Concentration on the surface decarburization characteristics and relation Rolling
2) Complete decarburization is the loss of carbon on the surface of a steel specimen to a level below the solubility limit of carbon in ferrite to produce entirely ferrite surface layers. Complete decarburizations can be divided into two categories: complete decarburization as shown in Fig. 1(d) at 800C and complete decarburization plus partial decarburization as shown in Figs. 1(e)1(f) at 850C and 900C. Effects of Temperature and Oxygen Concentration on the surface decarburization characteristics and relation RollingIt was reported that decarburization characteristics depend on heating temperature.57) For hypoeutectoid steels, decarburization characteristics are divided into three regions. In the region (a) TG (A 3 for pure iron) <T<1200 C, carbon concentration changes freely, and only partial decar-burization is observed. In the region (b) 675C<T<TG, fer- Forming condition and control strategy of ferrite surface decarburization characteristics and relation RollingThe ferrite decarburization behavior of 60Si2MnA spring steel wires for automotive suspensions, including the forming condition and the influence of heating time and cooling rate after hot rolling, was investigated comprehensively. Also, a control strategy during the reheating process and cooling process after rolling was put forward to protect against ferrite decarburization. The results show surface decarburization characteristics and relation Rolling