Sandvik develops coating tools with excellent cutting performance

In the turning of steel parts mainly in the automotive industry, most of the indexable turning inserts use P25 type hard alloy materials with good versatility. Recently, Sandvik developed a new grade of coating tool GC4225 with a significant improvement in cutting performance. It has the following characteristics: 1 The substrate adopts an optimized new cemented carbide material with gradient microstructure, which has excellent toughness and high temperature plastic deformation resistance, and has remarkable effects on suppressing surface crack propagation and chipping resistance; The layer material is a composite coating which is reasonably matched by Ti(C,N)+thick layer AI2O3+ ultra-smooth surface layer. The biggest feature is that after special surface treatment and AI2O3 coating thickening, the anti-flaking performance is improved.

It is well known that the coating is a brittle material, and as the thickness of the coating increases, the bonding strength with the substrate decreases, and the coating tends to peel off during cutting (especially during intermittent cutting). The composite coating of GC4225 has an improved anti-flaking performance when the Al2O3 coating is thickened. This is mainly because of the special surface treatment, on the one hand, the bonding strength of the Al2O3 coating is improved, and on the other hand, the rake face of the blade becomes a dense ultra-smooth surface, which improves the lubrication ability of the blade during cutting.

In the interrupted cutting process of the crankshaft, the GC4225 coated tool exhibits better cutting performance and longer tool life than the P25 cemented carbide tool under conditions of increased depth of cut and feed rate, increased cutting speed, etc. Better results have been achieved in terms of improving processing efficiency, product quality, and lowering production costs.

Xinxiang Lifeierte Filter Co., Ltd is specialized in manufacturing filter elements, filter housing, filter equipment, testing equipment and hydraulic parts.She is located in Xinxiang that is the center of filtration in China.Xinxiang Lifeierte Filter Co., Ltd integrates with oil filtration, water treatment and air purification to provide the society with more professional service and meet customers` demands. What`s more, Lifeierte has top-notch R&D team, professional technical team, effective production network and perfect after-sales service system. The corporate philosophy of Lifeierte is [to purify environment, to serve society, to manage faithfully,and to pursue excellence". The company also established the comprehensive cooperative relations with some famous design & research institutions and colleges. The quality of the product has reached the international advanced level and makes us achieve remarkable economic benefits.


Mainly including:

National standard filters and filter elements, replacement of abroad filters and filter elements, the hydraulic equipment like oil filter machines and filter series, the filter detective equipment;

Compressed air filters and filter elements, air cleaning filter drums and filter-bag series, various kinds of air cleaning facilities in different patterns;

Kinds of water treating equipment like stainless steel water filters and filter elements, full automatic backwashing filters.

We carry out ISO, DIN, IDF and 3A industry standard strictly during the manufacturing process and all the products can conform to the standards of GMP.

The endeavor makes us more professional. The performance and the effect of our replace products are comparable with imports; in addition the performance and the quality of domestically-made filters or filter elements are also stable and reliable. All those have been selected and recognized by customers and research institutions.

testing standards are satisfied by the products



ISO2941- filter elements- the testing for the cracking resistance

ISO2942- filter elements-the identifying for the structural integrity

ISO2943- filter elements-the identifying for the compatibility between material and the liquid

ISO3723- filter elements-the testing method for the end load of filter elements

ISO3724- filter elements-the identifying for the fatigue properties of the filter elements

ISO3968- filter elements-the testing for determination of pressure differential/flow characteristics

ISO4572- filter elements-the testing for the multi-pass method for evaluating filtration performance.

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