Materials Literature
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Service life of guide wheel is one of key factors to influence the size precision of rolled products. With practice of φ70 mm 20CrMnTiH gear steel product by 550 mill, according to test of properties of 4 steel grade- T8, Crl6Ni3, Crl2MoV and Cr23Ni5Mo for guide wheel and effect of different heat treatment processes o…
In accordance with the status of high reject rate in nondestructive test of third strand bloom casting with a 35-t tundish for five-strand 280 mm x 350 mm blooms, the effect of different flow control device on flow characteristics of liquid in tundish has been studied by numerical simulation and water model simulation…
The numerical-simulation on blooming and rolling process with 5 passes of BD2 mill at 1 200 °C for heavy rail steel U75V (/% : 0. 70 〜0. 78C, 0.50 〜0. 70Si, 0. 75 ~1.05Mn, ≤0.025P, 0. 008 〜0. 025S, 0. 04 〜0. 08V) has been carried out by using nonlinear finite element software ANSYS/LS-DY, and the distribution of equiv…
The effect of grain refining process with 4 times 860 Y 15 min water cooling recycling treatment on mechanical properties of maraging stainless steel 00Crl3Ni7Co5Mo4Ti (/% ： 0. 009C, 13. 28Cr, 7. 37Ni, 5. 36Co, 3. 59Mo, 0. 66Ti) has been studied. Based on the original structure of steel with 1 100 ℃ 1 h solid solution…
Based on production data of 30 t VOD process refining stainless steels at Second Steelmaking Plant, FuSteel, the effect of C (0. 50% ~0. 93% ) and Si (0. 18% ~0. 42% ) content in liquid for VOD refining on splashing and temperature of steel in oxygen blowing process has been analyzed. Results prove that the high C and…
The manual arc welding and CO2shielding gas arc welding of 3. 8 mm DP590 steel sheet (/% ： 0. 07C, 0. 45Si, 1.61Mn) are carried out respectively by Φ3 mm E4303 carbon steel welding rod (/% : ≤0. 12C, ≤0. 25Si, 0. 30 〜0. 60Mn) and Φ 1 mm H10MnSi welding wire (/% : 0. 14C, 0. 65 ~0. 95Si, 0. 80 ~ 1. 10Mn) with different…
The effect of 340 multi-stand pipe mill (MPM) continuous rolling process (at 950 ~ 1 100 °C with strain 0. 5 ~ 0. 8, strain rate 1. 0 s _ 1 , water or 3 °C/s cooling) and sizing process ( at 800 ~ 950 °C, with strain 0. 1 ~ 0. 3 , strain rate 0. 5 s-1air cooiing) on structure, and hardness of steel 36Mn2V and 40Mn2V h…
The continuous cooling transformation ( CCT) curves with cooling rate 0. 03 ~ 15. 60 T/s of Steel 30CrMo (/% : 0. 32C, 0. 20Si, 0. 60Mn, 0. 20Ni, 0. 97Cr, 0. 18Mo) 6 mm plate continuous-rolled by 56 mm thin slab are measured by using dilatation method and the microstructure of steel with different cooling rate is obse…
The metallurgy effect of carburized bearing steel G20CrNi2MoA for railway (/% ： 0, 19C, 0. 49Cr, 1.75Ni, 0. 23Mo, 0. 071 Al) by argon shielding atmosphere electroslag remelting ( ESR) in closed hood and by normal atmospheric ESR has been tested and analyzed. Results show that the loss of Si and Mn of argon shield atmo…
An analysis on longitudinal crack of 200 mm x 1 300 mm casting slab of UNS NO881O alloy (/% : 0. 06C, 0. 45Si, 0. 92Mn, 0. 016P, 0. 001S, 30. 15Ni, 19. 80Cr, 47. 81 Fe, 0. 33Ti, 0. 23Al, 0. 014 0N) produced by one-strand vertical continuous casting machine has been earned out by optical, scanning electron microscope,…
Taking the 90 ~ 105 t hot metal ladle at steel works as prototype, a geometric similarity ratio 1： 4 water model is established in laboratory and the effect of hot metal ladle side-blowing gas for auxiliary-deslagging on skimming area is studied by physical simulation method. Results show that as blowing gas rate is 0…
The effect of Ti content in steel lCrl8Ni9Ti electrode- [Ti] (0. 586% ~0. 839% ) , TiO2content in slag- (TiO2) (2. 1% ~4. 8% ) and packed ratio (0. 2 ~0. 4) (area of electrode / area of mold) on average melting loss of [Ti] during 1. 2 t ESR process is counted and analyzed. It is obtained that during electroslag remel…
Owing to less rolling passes and non-control cooling rate device after finishing rolling, the two kinds of structure-pearlite + ferrite and bainite + martensite in Φ70 ~ 80 mm round bar of steel 40CrMo (/% : 0. 40 ~0. 41C, 0. 97 〜1.05Cr, 0. 17Mo) produced by continuous rolling mill strain easily occur. By using Gleebl…
The effect of finishing temperature (800 ~850 °C ) and cooling rate (2 〜20 ℃/s) on structure and mechanical properties of microalloying steel Q55OD plate (/% ： 0. 06C, 0. 20Si, I. 60Mn, 0. 010P, 0. 001S, 0. 10Mo, 0. 06Nb, 0. 01V, 0. 02Ti) has been studied by using thermo-mechanical simulator Gleeble-3800. Results show…
In order to study the effect of tension on profile shape of single pass rolling strip of 304 austenite stainless steel (/% : 0. 053C, 0. 55Si, 1.50Mn, 0. 030P, 0. 002S, 17.02Cr, 8. OlNi, 0. 50Cu, 0. 08Mo) , based on explicit dynamic finite element method, the simulation and analysis on cold rolling process of 2 mm ste…
According to the analysis on stranding breaking rate of steel LX72A tire cord produced by 70 t LD converter flow sheet and 180t bottom blowing converter flow sheet, it is obtained that at the condition with same center segregation rating, as ratio of brittleness inclusions in steel decreases from 90. 7% to 20. 5% , i.…
The key step to cause the granulation of gas quenching molten slag is the granulated liquid slag droplet quick cooling and solidifying, and during slag droplet cooling process the main manners of heat transfer are convection and radiation. Based on established mathematical model for slag droplet cooling process, the r…
The cutting characteristics of common gear steel 20CrMnTiH (0. 006% S) and sulphur bearing gear steel 20CrMnTi (0. 031 % S) with different cutting speed (200 ~230 m/min) and cutting depth (0. 5 ~2 mm) have been tested and researched. Results show that with increasing cutting rate, the wear of tool increases, with cutt…
A great deal of saturated steam produced during converter melting is not often effectively used at steelworks ,while on the other hand the VD refining unit needs definite slight superheated steam. The results of converter steam supply to VD refining show that the saturated steam of heat reservoir of two sets of 100 t…
Developed Nb-Ti microalloying high strength steel (/% : 0. 04C, 0. 34Si, 1.40Mn, 0. 010P, 0. 004S, 0. 098Nb, 0. 020Ti, 0. 045Al, 0.002 5N) is melted by a vacuum induction furnace with casting 50kg ingot, forged to 40 mm plate, and rolled at 1 200 T to 10 mm plate by lab single strand mill with 7 pass, finishing pass r…