Multi-component alloy as-cast bainite gray cast iron cylinder jacket

Abstract

The present invention relates to a multivariant alloying cast bainite gray iron cylinder sleeve. The chemical components of the multivariant alloying cast bainite gray iron cylinder sleeve are counted according to the weight percentage as follows: C: 3.0 to 3.4 percent; Si: 2.2 to 2.6 percent; Mn: 0.6 to 1.0 percent; P: more than 0 but smaller than or equal to 0.1 percent; S: more than 0 but smaller than or equal to 0.1 percent Cu: 0.6 to 1.0 percent; Mo: 0.2 to 0.5 percent; Chrome: 0.1 to 0.3 percent; Nb: 0.05 to 0.12 percent; V: 0.05 to 0.2 percent; Titanium: 0.07 to 0.15 percent; and the remaining are Fe. After the optimized alloying elements are added in the cylinder sleeve of the present invention, compound kinetosome is gained, and the compound kinetosome is better than the present cast bainite kinetosome of the cylinder sleeve and the staying quality is improved; the mechanical property (including the intensity of tension and the rigidity) equals to the present cylinder sleeve, but the production cost reduces and the cost performance increases.

Description

(1) Technical field [0001] The invention relates to a multi-component alloyed cast bainite gray cast iron cylinder liner. (2) Background technology [0002] At present, cylinder liners made of a variety of alloy gray cast iron are still used in the society, such as medium phosphorus alloy cast iron, boron cast iron, niobium cast iron, vanadium titanium cast iron, copper chromium molybdenum alloy cast iron, copper molybdenum nickel alloy cast iron and other materials cylinder liners, due to Their matrix structure is mainly pearlite, the tensile strength of the material is low, generally σb is 200-300MPa, the hardness is 210-260HB, and the wear resistance is poor. This type of cylinder liner often cannot meet the requirements of contemporary high-speed, high-speed Requirements for intensified, high performance, low emission, long life internal combustion engines. [0003] The existing as-cast bainite gray cast iron cylinder liner, the main alloy elements added are nickel and ...

AI Technical Summary

Problems solved by technology

[0002] At present, cylinder liners made of a variety of alloy gray cast iron are still used in the society, such as medium phosphorus alloy cast iron, boron cast iron, niobium cast iron, vanadium-titanium cast iron, copper-chromium-molybdenum alloy cast iron, copper-molybdenum-nickel alloy cast iron and other materials. Their matrix structure is mainly pearlite, and the tensile strength of the material is low. Generally, σb is 200-300MPa, hardness is 210-260HB, and the wear resistance is poor. This type of cylinder liner often cannot meet the requirements of contemporary high-speed, high-speed Requirements for intensified, high-performance, low-emission, long-life internal combustion engines

[0003] The existing as-cast bainite gray cast iron cylinder liner, the main alloy elements added are nickel and molybdenum (generally the content of nickel is 1.0-1.5%, and the content of molybdenum is 0.7-1.2%). The matrix structure of this kind of cylinder liner is cast State bainite, good mechanical properties, good wear resistance, but the production cost of this kind of cylinder liner is high

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