Investigation of Effect of Casting Rate on Structure and Properties of Bronze Br010S2N3 Rods Prepared by Upwards Continuous Casting

Metallurgist ◽  
2021 ◽  
V. E. Bazhenov ◽  
A. Yu. Titov ◽  
I. V. Shkalei ◽  
E. I. Marukovich ◽  
I. V. Plisetskaya ◽  
2021 ◽  
Vol 60 (1) ◽  
pp. 591-598
Yaoli Wang ◽  
Kexing Song ◽  
Jilin He ◽  
Ran Yang ◽  
Yanjun Zhou ◽  

Abstract Copper alloy rod billet with 20% silver was prepared using homemade three-chamber vacuum cold-type vertical continuous casting equipment. The variation rules of the microhardness, eutectic ratio, and size and distribution of silver particles precipitated in the primary α-Cu phase at the end of the continuous casting alloy rod blanks were studied using a microhardness tester and scanning electron microscope. The obtained results show that when the cold-type vertical continuous casting speed is 120 mm·min−1, there is obvious reverse segregation of solute element near the end of the prepared ∅7.8 mm copper–silver alloy rod blank. From the end of the continuous casting alloy rod blank to 5 mm from the end, the Cu–Ag eutectic structure in the copper–silver alloy increases from 13.4 to 15.9%, and the size of Ag particles precipitated in the primary α-Cu phase increases from 100 to 350 nm. The microhardness increases from 56 HV0.05 to 85 HV0.05. When the distance from the end exceeds 5 mm, the microstructure and properties of the continuous casting alloy rod blank are basically stable.

2014 ◽  
Vol 44 (9) ◽  
pp. 665-668
E. Kh. Isakaev ◽  
A. S. Tyuftyaev ◽  
V. B. Mordynskii ◽  
G. A. Filippov ◽  
Yu. A. Pak ◽  

Metallurg ◽  
2021 ◽  
pp. 44-51
V.E. Bazhenov ◽  
A.Yu. Titov ◽  
I.V. Shkalei ◽  
E.I. Marukovich ◽  
I.V. Plisetskaya ◽  

2018 ◽  
pp. 64-68
A. M. Sergeeva ◽  
N. S. Lovizin ◽  
A. A. Sosnin ◽  
Yu. N. Mansurov ◽  

2019 ◽  
Vol 946 ◽  
pp. 709-715
A.S. Nuradinov ◽  
L.H-A. Saipova ◽  
N.S. Uzdieva

The influence of the electromagnetic mixing (EMM) of liquid metal in the mold of the continuous casting machine on its thermal work, the formation of the structure and properties of cast billets are investigated. The influence of the current and frequency of EMM on the mechanical properties, macro-and microstructure of round and square sorted billets was established.

Ernest L. Hall ◽  
Shyh-Chin Huang

Addition of interstitial elements to γ-TiAl alloys is currently being explored as a method for improving the properties of these alloys. Previous work in which a number of interstitial elements were studied showed that boron was particularly effective in refining the grain size in castings, and led to enhanced strength while maintaining reasonable ductility. Other investigators have shown that B in γ-TiAl alloys tends to promote the formation of TiB2 as a second phase. In this study, the microstructure of Bcontaining TiAl alloys was examined in detail in order to describe the mechanism by which B alters the structure and properties of these alloys.

E. Baer

The most advanced macromolecular materials are found in plants and animals, and certainly the connective tissues in mammals are amongst the most advanced macromolecular composites known to mankind. The efficient use of collagen, a fibrous protein, in the design of both soft and hard connective tissues is worthy of comment. Very crudely, in bone collagen serves as a highly efficient binder for the inorganic hydroxyappatite which stiffens the structure. The interactions between the organic fiber of collagen and the inorganic material seem to occur at the nano (scale) level of organization. Epitatic crystallization of the inorganic phase on the fibers has been reported to give a highly anisotropic, stress responsive, structure. Soft connective tissues also have sophisticated oriented hierarchical structures. The collagen fibers are “glued” together by a highly hydrated gel-like proteoglycan matrix. One of the simplest structures of this type is tendon which functions primarily in uniaxial tension as a reinforced elastomeric cable between muscle and bone.

C.K. Wu ◽  
P. Chang ◽  
N. Godinho

Recently, the use of refractory metal silicides as low resistivity, high temperature and high oxidation resistance gate materials in large scale integrated circuits (LSI) has become an important approach in advanced MOS process development (1). This research is a systematic study on the structure and properties of molybdenum silicide thin film and its applicability to high performance LSI fabrication.

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