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After making sure the design of the driving motor 7 and conveyer belt 6 of the screw extruding machine, the amount of the extrusion abrasive is a certain number per unit time, to switch the moulds with different section size, the extrusion speed change, and it requires that the speed of conveyer belt can be adjust, in order to realize this function, electromagnetic adjustable speed system can be taken, motor 13 is the asynchronous motor adjust the speed for electromagnetic slipping clutch, the working principle of the asynchronous motor speed control system of electromagnetic slipping clutch as shown in figure 2, the asynchronous motor 1 attached to the armature 2 through the coupling, the excitation winding fixed on the core attached to the load 5 through the armature, the excitation current attached to the excitation winding 3 through the slip ring 4 .
(2) Replace the section shape and size of the mould export can produce a variety of grains, to achieve one machine multipurpose and satisfy the different processing requirements
(3) Extruded grain forming method, the grain organization is dense, with high strength.

The mixture was left at room temperature for one day to harden before 0.025 g of one of a range of salts isostructural with NaCl (LiCl, NaCl, KCl, RbCl, NaF, KBr, KI), or one of a number of other chloride salts of different crystal structure (CaCl2, CuCl2, NiCl2, MgCl2) were sprinkled uniformly across the surface.
Results and discussion Since NaCl addition is known to induce a platelet geometry of the YBCO grains, it was assumed that the nucleating grains are templated by the crystal structure of the NaCl.
Only NaCl and KCl additions result in locally oriented clusters of platelet YBCO grains.

In compliance with the standard EN 1274 for every type of powder have to be written (in indication) its chemical composition, grain-size distribution and production method (melting, sintering, agglomeration and so on).
Moreover for every type of powder, there is allocated a sequence number (SE) and powders are classified according to chemical composition into five basic groups.
Tab. 1 The most commonly used types of W carbide powders for HVOF technology [6] Powder title Nominal Chemistry Powder production method Flow density g.cm3 Grain size of powder μm Ni wt.% C wt.% Cr wt.% Co wt.% W wt.% Al-1171 - 5.2 - 8 Bal Sintered 5.0 280 - 340 1320Q - 4.0 - 11 Bal Sintered 5.0 280 - 330 WC-489-1 - 5.3 - 12 Bal Sintered 4.9 280 - 340 1342VM - 5.4 - 12 Bal Agglom. and sint. 4.4 280 - 340 1343VM - 5.3 - 17 Bal Agglom. and sint. 4.3 280 - 340 1310VM 10.5 3.6 - - Bal Agglom. and sint. 4.4 280 - 340 WC-436-1 - 5.3 4 10 Bal Sintered 4.5 280 - 340 1350VM - 5.2 - 9.5 Bal Agglom. and sint. 4.5 280 - 340 WC-496 6 5.8 20 - Bal Sintered 3.2 280 - 340 1356VM 6 5 21 - Bal Agglom. and sint. 4.4 280 - 340 Thermal coatings made from tungsten carbide based powders are able to be used only to temperature 480°C.
Samples from materials AISI 1018 had surfaces roughened by shot blasting of SiO2 with an average grain size 210µm.

The terrace is mainly used for drying rice and grains.
The club floor is always used for drying grains, corn and sweet potatoes.
It is said that this kind of odd number bay structure forming the beauty of symmetry.
In Longsheng Guangxi, Each new construction beams hung the Liang Bu, there are three packets in the Liang Bu, filled with grains, symbolizing the harvest and express good wishes of people yearning for a better life.

And the light fraction, developing at the grain boundaries as a result of carbonitriding, also beneficiated Fe and Mo.
At the grain boundaries also, there is a large concentration of oxygen, which points to the emergence of the iron oxide in the grain boundaries.
Moreover, the increase of number and hardness carbide phases is accompanied by a significant decrease in the friction coefficient.

The frit composition and its thermal properties Oxide SiO2 Na2O K2O Li2O CaO MgO B2O3 TiO2 P2O5 % weight 48 7 7.5 2.9 10 3.3 13.2 1.3 6.8 α 9.809 x 10 -6 /ºC (thermal expansion coefficient measured between 27 - 307 ºC) Tg 470 ºC (Tg = transformation temperature) Ts 510 ºC (Ts = soften temperature) Frits were ground in agate ball mills and only fractions with grain size of less than 100 µm were retained.
In the first stage, metallic plates were polished to remove impurities and then blasted with Al2O3 powder with grain size of 125 µm followed by ultrasonic degreasing in acetone in two stages of 5 minutes each.
In order to improve the layer adherence onto the metallic substrates, Ti in our case, up to 8 % in weight titanium powder with grain size of 100 µm was added in the ceramic powder.
Working conditions Sample Substrate shape Number of barbotine layers Firing temp.

Consequently, it provides more uniform, large area, less number of graphene layers compared to those obtained on Ni substrate, in which the growth mechanism is due to segregation process [6, 7].
According to their findings, Luo et al [13] Indicated that, the final transferred graphene film was a replica of the Cu foil surface texture where the surface valleys and grain boundaries of Cu foil promoted the thick part of deposited graphene film.
After pre-annealing and graphene growth, it was observed that all these surface marks were reduced to some extent associated by emerging of various size recrystallized grains (Fig. 1b).
These recrystallized grains on the other hand seemed to increase the irregularity of the annealed surface as confirmed by AFM results shown later.

Considering that the α-γ transformation in steels is relatively fast and is completed in a few minutes [5], the temperatures at isothermal stages were selected for texture measurement because at these temperatures both phases are in relative equilibrium and only grain growth and concentration changes are possible but nucleation features do not occur.
Therefore live recording of texture changes during the transformation is not possible and only the texture evolution in the isothermal stages which can be associated to grain growth is followed.
The large number of diffracted grains in the diffracted volume is reflected as continuous Debye rings instead of individual points (cf.

., 100th cycle in the bending fretting fatigue process, the failure lives of bending fretting fatigue under different cyclic bending forces are estimated by SWT method (the values of fatigue strength exponent, fatigue strength coefficient, fatigue ductility exponent and fatigue ductility coefficient which are used in SWT critical plane method are -0.092, 745.4, -0.419 and 0.161, respectively) referring to a critical averaging dimension approach [5], which requires the critical volume Vc in the order of one grain in the discussed material.
In this work, the critical volume Vc is prescribed as one cubic grain size, and set as 1.25lc×lc×unit thickness in the z-direction.
Where, lc is the length of cubic grain and is about 60μm for 316L stainless steel.
Acknowledgment Financial supports of the project of “973” with contract number of 2007CB714704 and the Doctor Innovation Foundation (2010) of Southwest Jiaotong University are gratefully acknowledged.

The power dissipation map of 3003 Al alloy at 0.6 strain is shown in Fig. 2 and the contour numbers in which represent the constant efficiency of power dissipation.
In this domain, the microstructure is highly uneven and the flow instability is caused by uneven deformation of grain boundary.
Only elongated grains can be found, which are the typical recovery structure.
It can be seen from Fig. 5 (c) that the microstructure is composed of elongated newly refined grains separated by moderately high-angle boundaries as are observed, indicating that DRX occurs at 500 ˚C and 10.0 s-1.