Materials Literature
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It is basic condition for production of cleanliness to control Are furnace[P][S], total amount of [Pb] and [Zn].To prevent rephosphorization and slag free tapping are key operations to get low [P][S] molten steel of arc furnace. AS melting down the [Pb] exceeds standard limit, first stop carbon injection operation and…
The large-volume are fumace and continuous caster for alloy steels were built and imported at domestic main special steel works during end of the nineties of 20th century thus to bush the development of continuous casting technology for special steel in China forward. The casting billet size of alloy steel was between…
The φ25 mm bar of microalloying stocl F40MnV- 0.39～0.43C,1.20- 1.36Mn,0.07～0. 10V 0.009～0.024P,0.011～0.018S was produced by a 55 t converter + 60 t ladle refining fumace,150 mm×150 mm 4 strand concaster, short- stressed continuous rolling mill strain process. Okygen content in steel [0] was(18,8～20.5)x 10-6and[N] was(…
The surface temperature of profiled beam blank of Nb microalloying steel SM490YB-0.09～0. 13C,1.35 ~1.50Mn,0.04～0.06Nb during concasting by CIT-M Infrared Pyrometer. The results showed that the traverse surface temperature of beam blank was uneven, the surface temperature of beam at measured location in secondary cooli…
In general the special steels contain given alloying element, of which the solidification state is different from general carbon steel more easy to produce composition and structure segregation and surface crack of casting billet. Therefore it is necessary to increase cleanliness of liquid steel during special steel s…
The effect of flow control devices with different size and installed location on fluid flow in a thin slab conca-sting tundish at Maanshan Iron and Steel has been investigated by physical and mathematical hydraulics- simulation. The re- sults showed that as tundish hadn't flow control devices there were a short flow a…
The φ18mm and φ26mm test stel products of new high strength and toughness spring steel 40T;0.41C- 2.12Si- 1.03Cr- 1.98Ni-0.31Mo-0.25V,steel 44T:0.44C-2.28Si- 1.42Cr-0.25V and spring steel 60Si2CrVA:0.59C- 1.65Si- 1. 11Cr-0. 18V were produced by 20 t are fumace melting, rolling and cold drawing. The results of each ste…
The control rolling of φ45 mm steel UC2 -0.49C,Q.01Ti,0.01V was pilot produced by new built 350 kt special steel continuous rolling production line at Shanghai No5 Steel with controlling the Kocks inlet temperature of bar between 780 ℃ and 820 ℃.The results showed that the grain size rating of φ45 mm bar of UC2 steel…
The soft-contact electromagnetic continuous casting for steel is a technology using high frequency alternating electromagnetic field to load a electromagnetic force on initial solidification zone of billet in mold decrease contact pressure between liquid steel and mold wall, thus reducing the effect of mold oscillatio…
The USTB(University of Science and Technology Beijing)furnace wall oxygen injection technology have been used for a 50 t EBT arc furnace and a 60 t shaft arc furnace at Nol melting shop at Fushun Steel by cooperation of Fushun Steel and University of Science and Technology Beijing. The application results showed that…
The effect of end slag basicity, end Al content and vacuum treatment time in 20t LF-VD refining on oxygen content in 105 heats gear steels SCM318H,SCM322H,SCM420K-C, SCM822H and SCr40K for auto has been analyzed and studied. The practice operation results showed that using white slag operation, controlling end slag ba…
The 30~40 mm medium plate of HQ590DB ultra-low carbon bainitic steel - 0.05C- 1.5Mn-0.04Nb- 0.02Ti-≤0.0002B has been pilot-produced by 180 t converter- RH - LF (Ca treated)- concasting slab:230(300)mmx1650mm×6000 mm-4300 mill controlled rolling and cooling process. [H] in concasting slab was 1.7×10-⁶,[O] 21 ×10~⁶ and[…
The cutting ability of free cutting steel is better than that of common carbon steel to get better surface degree of finish of products. With developing of automobile industry, the consumption of free cutting steel continuously increases. At present, the cutting steels are wide produced by flow sheet of arc furnace- s…
The steel H13(4Cr5MoSiV1)-0.32～0.45C,0.80~1.2Si,0.20~0.50Mn,4.75～5.50Cr,1.10~1.75Mo,0.80~1.20V is a hot-work die steel wide used for hot extrusion die and pressure casting die with service temperature up to 600 ℃.The surface low temperature thermo-chemical treatment including ion nitriding, nitrocarburizing, V- nitroc…
Based on research of refining slag series by 55~75kg experimental ladle furnace (LF),the commercial production experiment of embedding are refining slag in a 60t ladle furnace has been carried out using three kind of slag:S1 slag-63.6~70.0 lime,22.7～25.0 high alumina and 5.0~13.6 fluorite; S2 slag-60.0~66.7 lime, 20.8…
To simulate compact strip production (CSP) technology, the effect of Nb-Ti on structure and mechanical properties of 400 MP and 460 MPa high strength weathering steel-0.060～0.076C,0.25～0.31Cu,0.45～0.56Cr 0.29~0.30Ni has been studied by 10 kg vacuum induction furnace melting and rolled into 6 mm plate. The results show…
The process of forged semi- high speed steel(0.74C,0.87Si,4.92Cs,1.05Mo,0.41V)Φ 540 mm× 1530 mm working roll for cold rolling was arc furnace steelmaking + electroslag remelting, forging, dual frequency inducting heating and quenching at surface temperature 1090 ℃ and high temperature tempering at 520 ℃. The distribut…
Besides cleanliness,degree of inclusion accumulation and recrystallization structure of steel,the texture distribution and intensity of each component have obvious influence on magnetic performance - magnetic induction strength and iron loss of cold rolled non-oriented silicon steel.The effect of hot rolling finishing…
The quenching and tempering process on mechanical properties of a new high strength spring steel 60SiCrV7 (0.54C~0.65C,1.35～1.65Si,0.7～1.0Cr,0.1～0.2V)has been tested the results showed that by optimum heat treatment process - oil quenched at 920 ℃ and tempered between 430 ℃ and 450 ℃,the tensile strength of steel was…
The test of 8 pass cold extrusion of equal channel angular pressing (ECAP) with ratio of extrusion reduction 1.02 of each pass for 00Crl8Nil2 austenite stainless steel has been carried out. The results showed that the strength and hardness of steel increased obviously after two pass extrusion, then increased minor aft…