阅读说明：本技术 一种汽油机耐磨气缸套的材料配方 (Material formula of wear-resistant cylinder sleeve of gasoline engine ) 是由 田进富 刘广祥 刘占文 刘飞 王倩 王贤慧 于 2021-06-12 设计创作，主要内容包括：本发明公开了一种汽油机耐磨气缸套的材料配方,包括碳、硼、锰、磷、硫、铁等元素,按所述比例制作。该材料提升了气缸套的耐磨性,提高了发动机的使用寿命。(The invention discloses a material formula of a wear-resistant cylinder sleeve of a gasoline engine, which comprises elements such as carbon, boron, manganese, phosphorus, sulfur, iron and the like, and is manufactured according to the proportion. The material improves the wear resistance of the cylinder sleeve and prolongs the service life of the engine.)

1. The formula of the material for the wear-resistant cylinder sleeve of the gasoline engine is characterized in that: the material consists of the following elements in percentage by mass: 2.8 to 3.5 percent of carbon, 0.030 to 0.065 percent of boron, 0.7 to 1.2 percent of manganese, 0.28 to 0.35 percent of phosphorus, less than 0.12 percent of sulfur and the balance of iron.

2. The material formula of the wear-resistant cylinder liner of the gasoline engine according to claim 1, characterized in that: the mass proportion of each element is as follows: 3.30% of carbon, 0.05% of boron, 0.95% of manganese, 0.31% of phosphorus, 0.10% of sulfur and the balance of iron.

3. The material formula of the wear-resistant cylinder liner of the gasoline engine according to claim 1, characterized in that: the mass proportion of each element is as follows: 3.30% of carbon, 0.05% of boron, 0.95% of manganese, 0.31% of phosphorus, 0.10% of sulfur and the balance of iron.

Technical Field

The invention relates to the technical field of material formulas, in particular to a material formula of a wear-resistant cylinder sleeve of a gasoline engine.

Background

At present, the problems that the manufacturability is poor, the processing is difficult, air holes and sand holes are easy to appear in the mass production process of the cylinder sleeve of the gasoline engine in the prior art, the cylinder sleeve is abraded too fast when the gasoline engine is assembled to normally work and the like exist, particularly, the service life of the cylinder sleeve is greatly reduced under the conditions that the working environment is severe and dust is easy to generate in work, and further the phenomena that the gasoline engine is difficult to start, the power is reduced, the oil consumption is increased, the emission exceeds the standard, and even the normal work cannot be realized occur.

Disclosure of Invention

Aiming at the defects of the prior art, the invention discloses a material formula of a gasoline engine wear-resistant cylinder sleeve, which is mainly characterized in that the specific gravity of metal elements such as carbon, boron, manganese, phosphorus, sulfur and the like is increased and adjusted on the basis of cast iron, the material improves the metal fluidity, reduces the processing difficulty of the cylinder sleeve and improves the wear resistance of the cylinder sleeve.

Boron: the new hard phase-boron-containing carbide appears in the structure, and the obvious characteristic of the metallographic structure is that the intermittent reticular composite structure of boron-containing carbide and phosphorus eutectic crystal is distributed on the pearlite matrix, thereby improving the wear resistance.

Manganese: can be dissolved in ferrite and cementite, improves the casting performance and the cutting performance of the pig iron, and manganese can form manganese sulfide with harmful element sulfur in a blast furnace and enter slag, thereby effectively reducing the content of the harmful element.

Phosphorus: belongs to harmful elements, which increases the hard brittleness of the material, but the phosphorus with reasonable proportion can increase the fluidity of the molten iron.

Sulfur: it is a harmful element, it promotes iron to combine with carbon, increases the hard brittleness of the material, and synthesizes iron sulfide with iron to make pig iron generate hot brittleness, reduces the fluidity of molten iron, and the sulfur content in the material can not be too high.

The invention comprises the following elements by mass percent: 2.8 to 3.5 percent of carbon, 0.030 to 0.065 percent of boron, 0.7 to 1.2 percent of manganese, 0.28 to 0.35 percent of phosphorus, less than 0.12 percent of sulfur and the balance of iron.

The mass ratio of each element is as follows: 3.30% of carbon, 0.05% of boron, 0.95% of manganese, 0.31% of phosphorus, 0.10% of sulfur and the balance of iron.

The casting process of the cylinder sleeve is centrifugal casting. Due to the adoption of the technical scheme, the invention has the following beneficial effects:

according to the material formula of the wear-resistant cylinder sleeve of the gasoline engine, the flowability of the cylinder sleeve manufactured by the formula during casting is improved, air hole and sand hole are eliminated, the cutting performance is improved, the wear resistance of the manufactured cylinder sleeve is improved by 50% compared with that of the traditional cylinder sleeve, the service life of the gasoline engine is prolonged, the oil consumption and the emission of the gasoline engine are greatly reduced, and the power of the gasoline engine is improved.

Detailed Description

The present invention is explained in detail by the following examples, which are intended to protect all technical solutions within the scope of the present invention.

In embodiment 1, the material formula of the wear-resistant cylinder liner of the gasoline engine comprises the following elements in mass proportion: 2.8 to 3.5 percent of carbon, 0.030 to 0.065 percent of boron, 0.7 to 1.2 percent of manganese, 0.28 to 0.35 percent of phosphorus, less than 0.12 percent of sulfur and the balance of iron.

As a preferred technical scheme of the present invention, the mass proportions of the elements are as follows: 3.30% of carbon, 0.05% of boron, 0.95% of manganese, 0.31% of phosphorus, 0.10% of sulfur and the balance of iron.

As a preferable technical solution of the present invention, the casting process of the cylinder liner is centrifugal casting.

The invention is not described in detail in the prior art, and the invention is embodied in many ways and is described in preferred embodiments. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the invention, but that various changes and modifications in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.