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In high speed state, deformation of head face caused by the temperature rise of end face is the key factor which constraints the stability of mechanical seal.
Water seal medium, seal medium and ambient temperatures are 20℃, seal media properties shows in Table 2.
Seal ring material properties shown in Table 3, which ring spindle speed 1000rad/s.
(a) Static ring (b) Intermediate ring (c) Rotating ring Fig. 2 Temperature distribution of mechanical rings Sealing ring temperature factors.
(a) Static ring (b) Intermediate ring (c) Rotating ring Fig. 4 The effect of thermal conductivity of seal rings on temperature Conclusion Film frictional heat changes with the rotational speed of the intermediate ring showed different trends, film frictional heat gradually increaes with QF2 rotational speed of intermediate ring increases, film frictional heat gradually reduces with QF1 rotational speed of intermediate ring increases Friction heat distribution coefficient is affected by many factors, friction heat distribution coefficient of static ring is small, friction heat distribution coefficient of the intermediate ring is larger, intermediate ring and rotating ring plays a dominant role in the cooling process.

The influence of pulse width on microstructure and mechanical properties of CrNx coatings was examined.
In many factors that affect HPPMS, pulse width determines the working time of high power, controls the output power at work. 
The change of pulse width will greatly effect the performance of power and properties of coatings.
References [1] Han Zeng-hu, Tian Jia -wan, Dai Jia-wei, et al., Preparation and mechanical properties of magnetron sputtered CrNx thin films, Journal of Functional Materials, 2002 33(5):500-502
Microstructure, mechanical and tribological properties of Cr–C–N coatings deposited by pulsed closed field unbalanced magnetron sputtering, Surf.

Heat treatment comprises of the application of heat, to a material to attain desired material properties (e.g. mechanical, electrical, magnetic, e-t-c.) as the material usually undergoes phase micro-structural and crystallographic changes [7].
The highest possible performance is obtained by determining the optimum combination of design factors.
It possesses the application of orthogonal arrays to identify the factor(s) and level(s) that affect the response data significantly.
Since there is a significant role of this factor Height of the Hammer also in Impact Testing therefore three different heights of the hammer were selected to see the affect.
Daramola et al: Effects of Heat Treatment on the Mechanical Properties of Rolled Medium Carbon Steel, Journal of Minerals & Materials Characterization & Engineering, Vol. 9, No.8, 2010, pp.693-708

The object of this study is to find out and evaluate systematically how the basic factors such as graphite-shape, external notch and matrix-characteristic affect the impact and bending characteristics of cast irons.
The main object of this study is to find out and evaluate systematically how the basic factors such as graphite-shape, external-notch and matrix-characteristic affect the impact characteristics of cast irons.
Experimental results and Discussion Microstructures and Mechanical Properties of Specimens.
The mechanical properties of these specimens were shown in Table 2.
Impact and Bending Properties Ferritic series.

Study on Organization and Properties of the new wear-resistant steel LI Ningbo1,a, XIE Jingpei1,b, WANG Wenyan1,c (1Materials Science and Engineering School of Henan University of Science and Technology ,Luoyang，471003，China aningbo721403@163.com, bxiejp@mail.haust.edu.cn, cwangwy1963@163.com ) Key words：new wear-resistant steel, mechanic properties, friction wear Abstract：By means of wear analysis of the wear-resistant steel used in the process, and adjust the wear-resistant steel composition, by adding alloying elements Cr, Mo and so on, optinlizing heat treatment technique, to get new wear-resistant steel.
The HR-150A rock well hardness tester and JB-300B impact tester as well as SHIMADZUAG-I250KV on electronic tensile testing machine were used to test the mechanical properties of materials.
Figure 2-1 Metallographic organization （a）1# （b）2# （c）3# （d）4# 2 Mechanical properties and the tensile fracture morphology analysis In the process of monopodium stretching, the coarser the grain is, the greater the stress and strain concentrate.
Table 3 Comparison of mechanical properties Sample number Tensile strength（MPa） Toughness（J/cm2） Hardness（HRC） 1 1724.2 16.3 52.1 2 2000.1 24.3 49.0 3 1984.5 28.2 52.7 4 1804.1 18.6 48.7 From the Figure 2 (a) and (d) the tensile fracture morphology, can see stress concentration of crack front changes the crack towards, thereby, so that cleavage cell appears to reduce dimple, and brittle fracture mechanism gradually increased , so the sample the section has only a few of dimples,and dimple patterns is bulky , its quasi-cleavage fracture, and there is inclusion therefore σ b low.
Factors affecting thestructure of chromium and chromium molybdenum white irons.

As the results assuming the influence of grain orientation on the grain boundary, it was found that the anisotropic mechanical property of grain boundary (interaction between opening and slipping deformations) would be a dominant factor of the fracture process.
Mechanical Property of Grain.
The properties of each grain in metallic materials have anisotropy due to the direction of grain growth.
Mechanical Property at Grain Boundary.
Conclusions Fig. 7 Effect of mechanical property in grain on von Mises stress distributions.

The adopted amount of silica fume generally is generally exceeding 25% of cement in weight but the influence of this amount on the properties of UHPC is still remaining as a domain to be investigated.
Accordingly, this study intends to derive the adequate amount of silica fume enabling to develop performances equivalent to former UHPC in terms of mechanical properties like the strength while reducing this amount.
To that goal, UHPC was manufactured and the mechanical properties of the compressive strength and flexural strength as well as the effects of the amount of silica fume on the fluidity of UHPC were examined.
Mechanical property.
[3] Park, J.J.; Koh, K.T.; Kang, S.T.; Ryu, G.S.; Kim, S.W.; Lee, J.H.: The effect of material factors on the compressive strength of ultra-high strength Steel Fiber Reinforced Cementitious Composites", Proceedings of the Korean Concrete of Institude, Vol.16, No.1(2004), p.288-291.

As a result of the research work, the factors affecting the preliminary thermal strengthening and additional strengthening of 65G steel samples using FTMP were identified, which allowed to increase the microhardness of the steel in the processing zone by more than 2 times.
It is emphasized that in this case there is a change in the mechanical properties along the cross-section [6], which is explained by high-temperature heating up to the melting temperature and subsequent cooling at a certain speed.
In addition, a change in mechanical properties can also be caused by the deformation of certain structural components [7].
Therefore, the purpose of the work is to identify the relationships between the influencing factors of FTMP and structural changes of the surface of steel samples.
Natarajan, Effect of process parameters on thermal history and mechanical properties of friction stir welds, Materials & Design. 30(7) (2009) 2726–2731

Metals that present bcc crystalline structure, when receiving addition of interstitial atoms as oxygen, nitrogen, hydrogen and carbon, undergo significant changes in their physical properties, being able to dissolve great amounts of those interstitial elements, thus forming solid solutions.
Interstitial diffusion coefficients, pre-exponential factors and activation energies were calculated for nitrogen in the Nb-2.0wt%Ti alloys.
This characteristic facilitates its application in materials that exhibit high mechanical resistance in high temperatures.
Metals that have bcc structure, when they receive the addition of interstitial atoms as oxygen, nitrogen, hydrogen and carbon, suffer significant changes in their physical properties, being able to dissolve great amounts of those elements, thus forming solid solutions.
Normally, internal friction is determined by damping mechanical oscillations and measured as a function of temperature.

First, the heat simulation text of the shell ring material has been carried out on the Gleeble-3500 thermal simulation test machine and the material properties were obtained.
The stress field, strain field and temperature field were studied, the metal plastic deformation and its influence factors were investigated.
Fig.1 The shell ring rolling mill Fig.2 True stress and true strain curve of the material Model building of shell ring rolling process The shell ring rolling is three dimensional, continuous gradual change, multi-pass rolling process, and is a complex plastic process effected by a variety of factors.
The zone outside the deformation zone is mainly affected by thermal convection and thermal radiation, and the time is very short, so the temperature has little change.
(2)Based on the elastic-plastic FEM, the three dimensional thermal mechanical coupled model of heavy shell ring with two drive rolls has been established, and the key problems such as geometric model, material properties, thermal boundary conditions have been solved