Product overview D12 series diesel engine developed by SINOTRUK the self-developed design,Power covering 340-460 Ps .The STEYR`s D12 engine achieve the road National standard IV - V, and the non-road National standard III emission regulations. It is an ideal supporting power for the domestic high-power engineering machinery. Product features Inherited the Steyr 10 liter engine cylinder cover, cylinder liner, frame type dry crankcase structure characteristic, maintain the bore center distance of key size unchanged, enlarge travel, increase the displacement
1. The four valve structure, improves the charging efficiency, burning more fully
2. A new generation of electronic controlled common rail fuel system using DENSO
3. The rear timing gear chamber, effectively reducing gear transmission noise.
According to absorb the comprehensive technology of STEYR`s engine from Austria and foreign advanced technology, meanwhile has established long-term strategy cooperation with the world 's leading manufacturers, such as the British RICARDO, the Dutch TNO, German BOSCH, the Japanese DENSO and so on, SINOTRUK improve the technology of STEYR`s engine continuously as to be a reliable and best cost-effective high-power diesel engine in China. It has achieved national V emission standard.
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(2) The particle shape of the powder. It depends on the milling method, such as the powder obtained by electrolysis, the particles are dendritic; the iron powder particles obtained by the reduction method are in the form of sponge sheets; the gas atomization method is basically a spherical powder. In addition, some powders are ovoid, disc-shaped, needle-shaped, onion-shaped, and the like. The shape of the powder particles affects the fluidity and bulk density of the powder. Due to the mechanical meshing between the particles, the strength of the green compact of the irregular powder is also large, and in particular, the dendritic powder has the highest strength of the compact. When it is as small as a few hundred nanometers, the storage and transport of the powder is not easy, and when it is small to a certain extent, the quantum effect begins to function, and its physical properties will change greatly, such as ferromagnetic powder will become superparamagnetic Powder, the melting point also decreases as the particle size decreases. However, for porous materials, it is best to use spherical powder.
Mechanical properties The mechanical properties of the powder, ie the process properties of the powder, are important process parameters in the powder metallurgy forming process. The bulk density of the powder is the basis for volumetric weighing during pressing; the fluidity of the powder determines the filling speed of the powder and the productivity of the press; the compressibility of the powder determines the ease of pressing and the application of pressure. High and low; and the formability of the powder determines the strength of the blank.
The chemical properties mainly depend on the chemical purity of the raw materials and the milling method. Higher oxygen content will reduce the pressing properties, the strength of the compact and the mechanical properties of the sintered product, so there are certain provisions in most technical conditions of powder metallurgy. For example, the powder may have an oxygen content of 0.2% to 1.5%, which corresponds to an oxide content of 1% to 10%.
(1) Particle size. It affects the processing of the powder, the shrinkage during sintering, and the final properties of the product. The performance of some powder metallurgy products is almost directly related to the particle size. For example, the filtration accuracy of the filter material can be empirically determined by dividing the average particle size of the original powder particles by 10; the properties of the cemented carbide product are very similar to those of the wc phase. In the big relationship, it is only possible to obtain a fine-grained cemented carbide with a finer-grained wc raw material. Powders used in production practice range in size from a few hundred nanometers to hundreds of microns. The smaller the particle size, the greater the activity and the easier the surface will oxidize and absorb water.