Effect of Heat Treatment on Microstructure and Properties of High Boron
A new type of high boron-high speed steel (HB-HSS) with different boron content was selected for oil quenching at 1050 °C, and different temperature of tempering treatment was chosen.
Spray characterization of boron-loaded slurry fuels using high-speed …
The characterization of atomized spray in terms of its structure, break-up, and droplet morphology is crucial to analyze an engine's performance. Therefore, in this study, the spray characteristics of boron-laden slurry fuels have been evaluated experimentally through a high-speed imaging technique. The rheological properties of the boron …
A study of casting high-boron high-speed steel roll materials
The microstructure, mechanical property and wear resistance of high-boron high-speed steel roll materi... A study of casting high‐boron high‐speed steel roll …
Spray characterization of boron-loaded slurry fuels using high-speed …
Therefore, in this study, the spray characteristics of boron-laden slurry fuels have been evaluated experimentally through a high-speed imaging technique. The rheological properties of the boron-loaded slurry fuels have been measured and their impact on the atomization behavior has been qualitatively analyzed.
Effect of boron concentration on microstructures and …
Precipitation behavior of boron-carbide hard phase comprising a new high-boron high-speed steel. Materials Research Express, Vol. 6, Issue. 10, p. 106516. CrossRef; Google Scholar; Ren, Xiangyi Fu, Hanguang Xing, Jiandong and Yi, Yanliang 2019.
Twisted-layer boron nitride ceramic with high deformability …
Fig. 2: Superhigh room-temperature deformability and strength of TS-BN ceramic prepared through SPS. a, Engineering stress–strain curves. TS-BN-I sintered at 1,600 °C for 5 min exhibited an ...
Multi-component boron and niobium coating on M2 high speed …
The objective of this research is to develop a boron and niobium-based coating on the high-speed steel M2 produced by powder metallurgy (P/M). Firstly, calculations by ThermoCalc® were made to ...
Combustion features of dispersed aluminum and boron in high …
The choice of dispersed metals and alloys with high heat of combustion is limited. Boron and boron-based alloys have the highest heat of combustion (∼58.1 kJ/g and 53.5 kJ/g or ∼136.0 kJ/cm 3 and 135.9 kJ/cm 3 for B and AlB 12, respectively) [ 1, 7 ]. Note that boron has a number of features associated with a slow burning and …
FLIGHT CAPABILITIES OF HIGH-SPEED-MISSILE …
Fligl/( Capabilities of High-Speed-Missi/e Radome Materials. radome will lose up to 7% of its wall thickness during an extended flight through a light rainfield below 3000 m. Depending on the exact amount of material lost and the altitude of the missile, the radome may allow the guidance system to perform acceptably.
Phase Diagram Calculation and Analyze on Cast High-Boron …
As a hypo-eutectic alloy, the composition range of boron in iron is 0.5-3.8%. From Fig. 2, the solid solubility of boron in the γ-Fe is 0.02% at 1149 °C and 0.0021% at 910 °C. The main reactions in liquid alloy during cooling process are as follows (Ref 28): L → δ-Fe; L → γ-Fe; L → γ-Fe + Fe2B. …
Effect of magnesium on the burning characteristics of boron particles
The information detected by the spectrometer and high-speed camera was recorded by a computer. The data collected were used for further analysis. ... 0.5 has a minimum initial temperature of 684.50 °C and a decreasing range of ~9.66% compared with the original boron. At high Mg/B mass ratios (Mg/B mass ratio >0.2), the decrease in …
Formation of Eutectic Borocarbides in High Boron High …
Abstract. In this work, the microstructure, the formation characteristics, and the growth mechanism of eutectic borocarbide during solidification in high boron high …
High-speed electro-optic modulator integrated with graphene-boron
A high-speed graphene electro-optic modulator based on a graphene-boron nitride (BN) heterostructure integrated with a silicon photonic crystal nanocavity is demonstrated and strongly enhanced light-matter interaction of graphene in a submicron cavity enables efficient electrical tuning of the cavity reflection. Nanoscale and power …
Boron-doped porous carbon boosts electron transport …
Boron-doped porous carbon (BPC) evidently enhanced Fenton-like oxidation capacity. • BPC drives the high-speed reduction of Fe(III) for H 2 O 2 activation to generate •OH. • Fe(III) reduction pathway was regulated by adjusting the amount of boron species. • BPC co-catalytic membrane worked well for micro-polluted water purification.
Effect of boron addition on the microstructure and …
Research on the addition of B in high-nitrogen steel remains limited, mainly due to the tendency of B to form coarse BN inclusions when combined with N, which deteriorates material properties. However, N50 steel, which contains a high N content, does not display obvious BN inclusions, possibly due to its low B content or the N50 alloy …
High-speed synthesis of heavily boron-doped diamond …
Here, we report the first synthesis of polycrystalline boron-doped diamond (BDD) by an In-liquid microwave plasma CVD (IL-MPCVD) process from a mixture of alcohols and boron trioxide (B 2 O 3).We simultaneously achieved high growth rates (up to 287 μm/h) and high boron concentrations (up to 7 × 10 21 cm −3).We examined the …
Wear and friction analysis of cubic boron nitride tools with …
Among the cutting parameters (cutting speed, feed rate, depth of cut), the cutting speed has the most significant effect on the tool wear and tool life during the high-speed turning process [17], [18], [19]. Meanwhile, we mainly focused on the difference in wear behaviors for different cBN tools with binders.
High speed grinding of particulate reinforced titanium …
This paper aims at investigating the machinability of particulate reinforced titanium matrix composites (PTMCs) during high speed grinding (80–140 m/s) using a monolayer brazed cubic boron nitride (CBN) superabrasive wheel. The removal mechanism of the hard-brittle reinforcements of PTMCs is discussed based on finite element …
EFFECT OF MAGNESIUM-COATED BORON PARTICLES ON
DOI: 10.1615/INTJENERGETICMATERIALSCHEMPROP.V2.I1-6.180 Corpus ID: 97177978; EFFECT OF MAGNESIUM-COATED BORON PARTICLES ON BURNING CHARACTERISTICS OF SOLID FUELS IN HIGH-SPEED CROSSFLOWS @article{Pace1991EFFECTOM, title={EFFECT OF MAGNESIUM-COATED BORON …
Performance and wear mechanisms of coated PCBN tools in high-speed …
Polycrystalline cubic boron nitride (PCBN) has the second-highest hardness in the world, excellent thermal stability, and chemical inertness, making it a suitable tool for machining superalloys. ... (2020) High speed machining of Inconel 718 with high pressure coolant focusing on material structures of CBN tools. Int J Automot Technol 14(6 ...
Effect of Heat Treatment on Microstructure and Properties of …
In traditional high speed alloy steels, boron is added to replace part of tungsten and molybdenum element; at the same time, adding a small amount of …
Blades for High Speed Compact Discs
Blades for High Speed Compact Discs. North American manufactured, tough and durable boron steel disc blades are OEM equivalent and made to operate at high speeds and stay sharp. Flat-center design and hole patterns mate with Degelman Pro-Till and Norwood Kwik-Till high speed compact disc machines. Stock Code:
Research on high-temperature dry sliding friction wear behavior …
High boron high speed steel and T15 steel are tested as pin sample. Chemical composition and hardness of T15 and Inconel718 are listed in Table 3. During the rolling process, materials being rolled has obvious plastic deformation, which results in severe sliding at its interface between roll. Consequently, the dry sliding wear test is …
Rapid exfoliation and surface hydroxylation of high-quality boron …
Boron nitride nanosheets (BNNS) hold significant promise as functional additives in thermal management materials for high-density and high-power electronic devices. However, due to the surface chemical inertness and strong "lip-to-lip" interactions between adjacent layers of hexagonal boron nitride, efficient exfoliation and …
Polymer-based low dielectric constant and loss materials for high-speed …
In high-speed communication and 5G networks, the dielectric constant is a crucial parameter that determines the performance of electronic devices and systems. ... The integration of thermally conductive fillers, including carbon nanotubes, graphene, and boron nitride, into the polymer matrix has been identified as an attractive way to attain ...
High-Speed Electro-Optic Modulator Integrated with Graphene-Boron
Here, we demonstrate a high-speed graphene electro-optic modulator based on a graphene-boron nitride (BN) heterostructure integrated with a silicon photonic crystal nanocavity. Strongly enhanced light-matter interaction of graphene in a submicron cavity enables efficient electrical tuning of the cavity reflection.
Effects of modification on microstructure and properties of …
The microstructure of Al-bearing high-boron high speed steel (AB-HSS) contains a large amount of borocarbides, which makes it have high hardness, superior wear resistance and thermal stability. But the borocarbides are coarser and continuously distribute along the grain boundary which seriously destroys the toughness of AB-HSS. In this paper, the …
Effect of Chromium on Microstructure and Oxidation …
and high-temperature tribology behavior of high-boron high-speed steel under different heat treatments, and the results pointed out that increasing the quenching temperature could reduce the high-temperature friction coefficient at 500 C friction (e.g., the smallest value of 0.425) [14].
Formation of Eutectic Borocarbides in High Boron High Speed …
The experimental results illustrate that the as-cast microstructure of high boron high speed steel consists of α-Fe matrix, eutectic borocarbide M 2 (B,C) with continuous network structure, M 3 (B,C) boron-cementite, and M 7 (C,B) 3 (M = Fe, Cr, Mo, V, Mn). Different precipitating sequences of eutectic borocarbides with various …
Effect of Quenching Process on Microstructure and performance of High
DOI: 10.1590/s1517-707620190003.0769 Corpus ID: 203548447; Effect of Quenching Process on Microstructure and performance of High-Boron High-Speed Steel @article{Hanguang2019EffectOQ, title={Effect of Quenching Process on Microstructure and performance of High-Boron High-Speed Steel}, author={Fu Han-guang and Yang Yong …
