Search results

Effects of parameters on properties of urea-formaldehyde resin Effects of parameters on properties of urea-formaldehyde resin were investigated and results were shown in Table 2.
Effects of parameters on properties of urea-formaldehyde resin Parameters Viscosity [mPa·s] Free Aldehyde [%] Binding Strength [Mpa] F:U 0.8:1 26 0.011 1.01 0.9:1 29 0.043 1.72 1.0:1 32 0.090 2.16 1.1:1 35 0.122 2.95 1.2:1 39 0.133 3.70 1.3:1 45 0.198 3.83 Polyvinyl Alcohol % 0.1% 40 0.108 3.75 0.3% 43 0.092 3.86 0.5% 45 0.076 3.94 Melamine % 1% 46 0.072 3.99 3% 49 0.067 4.08 10% 56 0.063 4.21 20% 63 0.054 4.32 F: formaldehyde U: urea It was shown in Table 2 that Formaldehyde/Urea ratio was an important factor that affected the adhesive property of urea-formaldehyde resin.
The effects of hydroxymethylated alkali lignin participated in resin synthesis on properties of urea-formaldehyde resin were investigated to find the proper formaldehyde addition amount.
The proportion of lignin (on the base of urea amount) changed from 10% to 35%, and the properties of resin were determined and results were shown in Figure 1-3.
(4) The addition of lignin affected the properties of UF resin, the free formaldehyde content was the lowest when lignin amount was 30%, and the binding strength was 3.41Mpa at this condition, which could achieve the level of national standards.

Study of Metallurgy and Mechanical Properties of Japanese Swords Muneo Yaso1, a, Yoshihiro Minagi1, b, Toshifumi Takaiwa1, c Kunichika Kubota2, d, Tsuyoshi Kanaizumi2, e Takuya Ohba3, f, Shigekazu Morito3, g, Taisuke Hayashi3, h 1 Yasugi municipal Wakoh Museum, Shimane 692-0011, Japan 2 Metallurgical Research Laboratory in Yasugi Works, Hitachi Metals, Ltd., Shimane 692-8601, Japan 3 Department of Materials Science, Shimane University, Shimane 690-8504 Japan ayasoke_youkoso@ybb.ne.jp, b, c wakou@tx.miracle.ne.jp, dKunichika_Kubota@hitachi-metals.co.jp etsuyoshi_kanaizumi@hitachi-metals.co.jp, fohba@riko.shimane-u.ac.jp, gmosh@riko.shimane-u-ac.jp, hthayashi@riko.shimane-u.ac.jp Keywords: Japanese sword, Lath martensite, Residual stress, Bending test, Strength, Toughness Abstract.
In this report, firstly metallurgical properties were observed in surface and cross section using two kinds of Japanese swords.
The relationship between metallurgical characteristics and mechanical property on Japanese sword is discussed.
The thickness of hardened area and transition length to soft area, that is, gradient of hardness, may affect sword strength and bending test behavior.
The residual stress is an important factor for understanding mechanical property of Japanese sword and especially the residual stress in longitudinal direction on the surface of sharp edge is effective for breakage.

Experimental investigations on machining Micro Alloy Steel (MAS 38MnSiVS5) using K 20multi coated carbide insert Subramani Muniraj1,a* , Nambi .Muthukrishnan2,b 1 Assistant Professor in Automobile Engineering Department, Sri Venkateswara college of Engineering, Pennalur, Sriperumbudur – 602 117, Tamil Nadu, India 2 Professor, Department of Mechanical Engineering, Sri Venkateswara college of Engineering, Pennalur, Sriperumbudur – 602 117, Tamil Nadu, India amuniraj@svce.ac.in, bmk@svce.ac.in *Corresponding author, e-mail:muniraj@svce.ac.in Key words: MAS, K 20 multi coated (TiN-TiCN-Al203-ZrCN) carbide insert, Surface roughness, Power consumed ABSTRACT An experimental investigation is carried out on machining Micro Alloy Steel (MAS).
Therefore, new free-machining steel was developed by minimizing MnS size and distributing them isotropically and it was verified that the developed steel had good properties not only in machinability but also mechanical properties.
The developed steel was useful in steel requiring high strength and machinability such as crank shafts of engines. [2,6-8] Kurtomi (1990) carried out a study on light weight connecting rod’s fatigue resistance which are made of micro alloyed steel and found that the micro alloyed steel SV 40CLI showed lower fatigue strength for smooth specimen but equivalent or higher fatigue strength for notched specimen than quenched and tempered steel S10 C steel. [7,9] Nakumara et.al (1993) made a research on the machining of free micro alloyed steel and the micro alloyed steel with best composition of alloy elements such as C, Mn, Cr, V, S, Pb, and Ca, and their impact on fatigue strength and machinability were found as 26% higher fatigue strength than conventional free machining microalloyed steel and 15% weight reduction resulted without any reduction of mechanical or fatigue strengths.
This is attributed to other machining factors which affect the surface finish.
Their mechanical behavior,” New Steel Products and Processing for Automotive Application, Detroit, USA (26-29 Feb. 1996) 89-100

Dielectric properties are categorized into electro chemical properties and electro physical properties.
In EDM process, ionization and deionization depends on electro physical properties like kinematic viscosity, pour point, fire point, flash point, thermal conductivity and specific heat and electro chemical properties such as breakdown voltage, dielectric constant, dielectric dissipation factor, interfacial tension, water content, acidity value and dissolved gas analysis of dielectric fluids [6, 7].
In their investigation, different edible oils (Canola, Sunflower, Soyabean and Olive) and its electro-chemical properties (dielectric breakdown voltage, dissipation factor, interfacial tension and acidity number) were analyzed.
Table 1 shows the various properties of conventional dielectric and vegetable oils.
Surface roughness of the component influences the tribological properties.

As doing so, the demands for nano- particles are not only to maintain their outstanding special magnetic properties, but also to strengthen their biological compatibility, mechanic and chemical stability or other properties [5-7].
So, factors effecting hydrolyzation of TEOS include temperature, concentrations of water and ammonia.
But the hysteresis loops of samples that have been coated are weaker than that of Fe3O4, revealing that the coated layers affected the magnetic properties of SiO2@Fe3O4 micro-spheres.
With nonmagnetic SiO2 covered on Fe3O4, the magnetic properties of SiO2@Fe3O4 micro-spheres declined.
(3) Rotate speed almost had no influence on magnetic properties

On the one hand, the air gap formed between the casting and the mould during solidification of the melt leads to the complexity of heat transfer; on the other hand, the heat transfer between the casting and the mould is affected by many factors that are difficult to quantify, such as enclosed strength on spindle, the geometry of the casting, and the roughness of the contact surface.
Meshing of two-dimensional models for calculation 3.3 Thermal properties and boundary conditions In order to accurately simulate the cooling process, it is of primary importance to obtain accurate thermal parameters of castings and moulds[9].
This method is simple in concept and is suitable for general one-dimensional two-dimensional models with temperature-related physical properties.
This gap significantly reduces the heat flow between the casting and the mould, affecting the internal grain growth rate of the casting.
During the actual casting cooling process of molten tin, due to the great difference in temperature and thermal properties between the casting and the refractory mould, the heat of the surface after liquid tin filling is rapidly diffused into the refractory mould, and then the heat is slowly diffused through the mould and the insulating medium.

Resistance wall structure actually integrates the properties of closed-die and flash slot structures, which assimilates their advantages of filling capacity and service life.
Several Factors impact the physical underlying phenomena behind die failure on forging processes: pressures, sliding velocities, hot hardness and a variety of physical and mechanical properties.
This treatment will not affect the evaluation.
From the preceding analysis we can see that die failures are closely related to the system properties of high load and high heat.
[5] ZHOU Jie: Chinese Journal of Mechanical Engineering.

Properties and Features of LWC Light Weight.
"Properties of concrete containing paraffin wax."
"Effect of High Temperature on Some Properties of Light Weight Concrete."
"Mechanical and thermal properties of lightweight concretes with vermiculite and EPS using air-entraining agent."
"Structure and properties of aerated concrete: a review."

The Development of Rock Failure Electromagnetic Emission Monitoring System HUANG Song-ling1, ZHU Fu-rong2, ZHU Hong-xiu2, WEI Zheng1, WANG Shen1 1.State Key Lab of Power Systems Department of Electrical Engineering, Tsinghua University, Beijing 100084, China), 2.School of Mechanical Electronic & Information Engineering, China University of Mining & echnology(Beijing) Key words: rock failure electromagnetic emission; electromagnetic induction; signal-conditioning circuit; LabVIEW programming Abstract.
Several testing results have been achieved in rock failure experiments on marble that are carried out both by mechanical loading and expansion caused by chemical agents. 1.
In addition there are some other factors that may affect the result of rock failure experiment and must be considered carefully, such as the difference in composition and inhomogeneous distribution of composition even in the same kind of rock and different methods leading to fracture [1-3].
When a rock is loaded to failure by a mechanical device, it only takes a short period of time of several minutes with relatively strong EME.
Frequency Properties of Electromagnetic Emission Associated with Microscopiccracking in Rocks.

The effect of principle factors affecting the dye removal efficiency including pH, contact time, the sorbent amount, ionic strength and solution volume were studied using Taguchi functional factorial design.
Optimization by orthogonal array design Taguchi method as an orthogonal fractional factorial design has been utilized to optimize the experimental factors affecting the removal efficiency [19].
This study considers five controllable factors, for four levels.
Furthermore, the magnetic properties of Fe3O4@SiO2-KIT-6-SO3H make it more efficient adsorbent for the removal of MG from aqueous solution.
Langmuir, The constitution and fundamental properties of solids and liquids.