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The mechanical properties of medium carbon steels are directly affected by heat treatment parameters such as austenitizing temperature, tempering temperature and cooling rate [12- 15].
The variation in structure induced by the tempering treatment is one of the factors influencing the wear groove depth.
Sulaiman, Effect of tempering temperature on mechanical properties of medium carbon steel, Int J.
Akanbi, Effect of heat treatment on mechanical properties and microstructure of NST 37-2 steel, J.
Kadhim, Effect of quenching media on mechanical properties for medium carbon steel, Int.

Analysis of the Influence of Static Flow Resistance on the Sound Absorption Properties of Aluminum Foam BAO Huaiqian1, a, ZHANG Ning1, b and HOU Xuegang2, c 1College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, Shandong, China, 266590 2Rizhao Polytechnic, Rizhao, Shandong, China, 276826 abhqian@163.com, bzhangn188@163.com, cjdhxg@126.com Keywords: Aluminum Foam; Sound absorption; Flow resistance; Backing.
The paper also calculates and analyzes the influence of Static flow resistance on the sound absorption properties in the rigidity and cavity backing.
The paper analyzed the influence of the thickness of the backing of aluminum foam and static flow resistance on the sound absorption properties.
Moreover, we can achieve the best sound absorption properties by controlling the flow resistance.
The backing can improve the integral sound absorption properties and make the peak frequency moves to the range of middle and low.

Generally it is necessary for micromachined accelerometer system to compensate for the phase lag caused by poles of mechanical element and interface itself[1].
Fig. 1 Sensor element equivalent math model It is obvious that sensor element is characterized as 2nd transfer property.
Root locus of 2nd-order ΣΔ micromachined accelerometer shows that eigenvalue of 2nd-order system always exist at left half-plane with different quality factors.
Thus, the system is not sensitive to variation of quality factors.
Figure 3 shows the relationship between SNDR and compensation coefficient in 2nd-order ΣΔ system (quality factor is 0.86).

The method and quality of grinding have a significant impact on the technical properties of NC: fractional composition, nitrogen content, viscosity characteristics, solubilities, average degree of polymerization, sorption and physico-mechanical properties, which must be taken into account when optimizing the rheological and technological characteristics of the obtained cellulose nitrate compositions.
The main technological and structural parameters of the equipment that have the greatest impact on the grinding process, the quality indicators of the NC, affecting the physicochemical characteristics of cellulose nitrate compositions based on them are identified.
Powders, solid rocket fuel and its properties.
Structure and properties of high-quality dispersed cellulose nitrates. // Materials of the VIII All-Russian Conf.
Study of the structure and properties of powder pulp. / A.A.

But in reality, many factors affect the machining efficiency and precision, including both structural parameters and processing parameters, the external environmental factors.
In high speed motion, the centrifugal force, inertial force and heat factors become an important factor affecting the accuracy.
On the other hand, the machine running rule is no longer a simple linear superposition of each functional module because of the complex relationship of each functional unit and the rising movement control system function, and many factors can affect the machining precision and the safe operation of equipment.
And in the process, many factors influence the machine tool's dynamic performance, such as certain parts of machine tool’s elastic deformation, and these basic parameters unknown before processing.
So before the actual processing, the CNC equipment dynamic properties should be monitored in machine in the simulated conditions to provide the basis of parameters selection and directional indicator for correct using of machine, such as the selection of appropriate tool and spindle speed for avoiding forced vibration; the selection of appropriate processing parameters for avoiding self excited vibration.

Prediction of Temperature Distribution in High-Speed End Mill assisted by Heat Pipe Cooling JU Huaweia, TANG Weixiaob, SONG Qinghuac and ZHOU Hongliangd Key Laboratory of High Efficiency and Clean Mechanical Manufacture, School of Mechanical Engineering, Shandong University, Ji’nan 250061 P.R.
The cutting temperature is a key factor which directly affects thermal distortion, the machined part’s dimensional accuracy, as well as the tool wear in machining process.
For simplicity, the heat generated in the tool blade is modeled as a cylindrical band heat source surrounding the cylinder, and the inner heat source is neglected, this approach has been proved by former research [4]. heat convection on the pipe and mill surfaces exposed to the environment is considered as boundary condition Fig. 1 Idealized heat conduction model of an end mill with a heat pipe All the thermal properties of the heat pipe and the milling tool are treated as constant.
The thermal property of the heat pipe is obtained from experiments by Chiou et al. [3].
Component dimensions and material properties are shown in Table1, and all parameters are independent of temperature and time.

Effect of Speed on the Wear Behavior of FKM/NBR Blends under Dry Sliding Yuzeng Zhang1, 2, a, Mingyin Yan1, b, Shijie Wang1, Xiaoren Lv1, Rui Nie1 1School of Mechanical Engineering, Shenyang University of Technology, Shenyang, China 2 School of Mechanical Engineering, Shenyang Ligong University, Shenyang, China aZhangyuzeng2010@126.com, bymy_s@yahoo.com.cn Keywords: FKM/NBR blends, Speed, Wear behavior, Dry sliding, Progressing cavity pump.
Introduction The speed of progressing cavity pump (PCP) is one of the key factors in PCP oil production system.
The choice and control of speed is very important, and the improper selection of speed would affect the pump efficiency and service life [1-2].
Surface morphology of NBR The above results show that the frictional heat is the key factor in the dry sliding, which can affect the transfer of wear mechanism.
An investigation of mechanical and rheological properties of NBR/PVC blends: influence of anhydride additives, mixing procedure and NBR form.

The characteristic of their ceramic-technological properties is given.
The dependence of physical and mechanical properties and ceramic specimen color form the vanadium slag amount in charge is established.
Besides, the influence of pigments on physical and mechanical properties of products is studied [15].
The given work is aimed at studying the dependence of the decorative, physical and mechanical properties of ceramic materials with matrix structure from vanadium slag addition.
Such improvement of physical, mechanical properties and a high coloring effect caused by slag chemical composition (Table 2).

The reinforcement of such aluminum-based profiles with high-strength materials offers a high potential for weight reduction and an improvement of functional and mechanical properties.
Due to the wires' specific properties, e.g. high stiffness, their deflection behavior must be analyzed to guarantee a stable feeding-in process.
The main influencing factors are determined and a process window is deduced.
The material properties in fiber direction strongly depend on the fiber quantity in relation to the total volume, the type of the fibers, and the characteristics of the fiber matrix connection and vary accordingly in larger extent [9].
It is possible that small pores remained during the infiltration of the fiber bundle where the liquid matrix material was not able to penetrate and this phenomenon has a negative effect on the material properties of the wire [10].

Wan 1,c 1 School of Mechanical Engineering, Shandong University, China 2 Shandong Metallurgic Technical Institute, China a melius@sdu.edu.cn, bztz668@sina.com, cwanyi@sdu.edu.cn Keywords: High speed machining, Turning machinability, Austenitic stainless Steel, Ceramic tool Abstract.
High strength, low thermal conductivity, high ductility and high work hardening tendency of stainless steels are the main factors that make their machinability difficult.
The main constitutes mechanical properties of LT55 are listed in Table 1.
Table 1 Main constitutes and mechanical properties of ceramic tool LT55 Main constitutes Flexural strength [MPa] Fracture toughness [MPa m1/2] Vickers's hardness [Gpa] Al2O3/TiC 900 5.04 21.5 Results and discussions Chip Formation and Chip Color.
As was explained in the previous section, it was deduced from the chip's color, which is the most obvious indication of temperature of chips, that the chips formed at 110 m/min and 160 m/min cutting speed were affected most from the heat and therefore had the higher temperature when compared to at higher cutting speed of 210 m/min.