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

A multi-element alloy and bainite technology, which is applied to cylinders, cylinder heads, engine components, etc., can solve the problems of low tensile strength, poor wear resistance, and high production cost of cylinder liners, so as to reduce production costs and improve wear resistance , cost-effective effect

Active Publication Date: 2008-02-06
ZYNP GRP
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-component alloy as-cast bainite gray cast iron cylinder jacket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to the weight percentage of each chemical composition, it is carbon 3.2%, silicon 2.4%, manganese 0.8%, phosphorus 0.055%, sulfur 0.05%, copper 0.8%, molybdenum 0.3%, chromium 0.2%, niobium 0.07%, vanadium 0.08%, titanium 0.07%, the balance is Fe for batching. The molten iron is smelted in a frequency conversion induction furnace, and 0.6% silicon-barium-calcium inoculant is added to the molten iron before it is released from the furnace. The molten iron is controlled at a temperature of 1530°C and the molten iron is released from the furnace; the conventional process of centrifugal casting of metal mold wet paint is used to produce cylinder liner castings. Control the casting temperature at 900°C, and then quench and cool for 90s to reduce the casting temperature to 460°C. Send the castings into the incubator for slow cooling, keep warm for 90 minutes and then leave the box for air cooling. Then the casting was tempered at 450°C for 2 hours to obtain a multi...

Embodiment 2

[0029] According to the weight percentage content of each chemical composition, it is carbon 3.1, silicon 2.5, manganese 0.7, phosphorus 0.06, sulfur 0.04, copper 0.9, molybdenum 0.25, chromium 0.25, niobium 0.1, vanadium 0.1, titanium 0.08, and the balance is Fe for batching. The molten iron is smelted in a frequency conversion induction furnace, and 0.5% silicon strontium inoculant is added to the molten iron before it is released from the furnace. The molten iron is controlled at a temperature of 1520°C and the molten iron is released from the furnace. Cylinder liner castings are produced under the conventional process conditions of centrifugal casting of metal mold wet paint. The casting temperature is 880°C, and then quenched and cooled for 60s to reduce the casting temperature to 490°C; the castings are sent to an incubator for slow cooling, kept for 90 minutes, and left for air cooling. Then the casting was tempered at 440°C for 2 hours to obtain a multi-component alloye...

Embodiment 3

[0031] According to the weight percentage of each chemical composition, it is carbon 3.3, silicon 2.2, manganese 0.7, phosphorus 0.07, sulfur 0.08, copper 0.7, molybdenum 0.4, chromium 0.15, niobium 0.08, vanadium 0.08, titanium 0.07, and the balance is Fe for batching. The molten iron is smelted in a frequency conversion induction furnace, and 0.7% silicon barium inoculant is added to the molten iron before it is released from the furnace. The molten iron is controlled at a temperature of 1550°C and the molten iron is released from the furnace. Cylinder liner castings are produced under the conventional process conditions of centrifugal casting with metal mold wet coating. Control the casting temperature at 860°C, then quench and cool for 120s to lower the casting temperature to 420°C; put the castings into an incubator for slow cooling, keep them warm for 90 minutes, and leave the box for air cooling. Then the casting was tempered at 450°C for 2 hours to obtain a multi-compon...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
hardnessaaaaaaaaaa
hardnessaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

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 ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/00C22C37/00
Inventor 秦小才缪青殷建祥刘治军王小军
Owner ZYNP GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap