Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of cast iron material for producing valve seat ring and the production method of valve seat ring

A production method and valve seat technology, applied in the field of high-speed impact-resistant materials, can solve the problems of complex production process, long production process and high production cost, and achieve the effects of good mechanical strength, high production efficiency and reduced production cost

Inactive Publication Date: 2018-08-31
GUIZHOU JINMO SCI INDAL & TRADE
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The engine valve seat is subjected to the high-speed impact of the valve in high temperature and corrosive environment. The valve seat produced by the current cast iron material has a low service life, the production process is complex and includes precious metal materials such as vanadium and molybdenum, and the production cost is high; the valve seat is cast The production process includes powder metallurgy or smelting of various materials to produce white structure, and then tempered at high temperature. The production process is long and the production cost is high. Therefore, it is necessary to improve the material for the production of valve seat rings to simplify the complex production process

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The production method of the valve seat in this embodiment includes the following steps in sequence: material preparation-smelting-casting-machining;

[0019] 1) Raw materials: 0.05% boron, 2.5% chromium, 1.5% copper, 0.05% titanium, 1.5% manganese, 2.2% silicon, 0.07% sulfur, 0.02% phosphorus, and the rest is iron;

[0020] 2) Smelting: Add half of the iron into the intermediate frequency furnace and melt it to 1400°C, then add alloys: boron, chromium, copper, titanium, manganese, silicon, sulfur, phosphorus, and after the alloy is evenly melted in the furnace, 25% of the iron is released from the furnace Molten iron, immediately add the remaining iron to the molten iron to melt into molten iron;

[0021] 3) Casting: adjust the rotational speed of the centrifugal pouring machine according to the inner diameter of the product, heat the metal mold on the centrifugal pouring machine to 350°C, spray the release coating, add the molten iron finally obtained in the smelting ...

Embodiment 2

[0024] The production method of the valve seat in this embodiment includes the following steps in sequence: material preparation-smelting-casting-machining;

[0025] 1) Material preparation: boron 0.1%, chromium 2%, copper 0.5%, titanium 0.1%, manganese 2.4%, silicon 3%, sulfur 0.01%, phosphorus 0.04%, and the rest is waste pig iron;

[0026] 2) Melting: Put half of the waste pig iron into the intermediate frequency furnace and melt it to 1300°C, then add alloys: boron, chromium, copper, titanium, manganese, silicon, sulfur, phosphorus, and after the alloy is evenly melted in the furnace, 30% of it is released Add the remaining waste pig iron to molten iron immediately to melt into molten iron;

[0027] 3) Casting: adjust the rotational speed of the centrifugal pouring machine according to the inner diameter of the product, heat the metal mold on the centrifugal pouring machine to 350°C, spray the release coating, add the molten iron finally obtained in the smelting step, and ...

Embodiment 3

[0030] The production method of the valve seat in this embodiment includes the following steps in sequence: material preparation-smelting-casting-machining;

[0031] 1) Material preparation: boron 0.15%, chromium 1.5%, copper 1%, titanium 0.08%, manganese 2.5%, silicon 3.2%, sulfur 0.05%, phosphorus 0.06%, and the rest are scrap iron;

[0032] 2) Melting: Add half of the scrap iron scraps into the intermediate frequency furnace and melt to 1500 ° C, then add alloys: boron, chromium, copper, titanium, manganese, silicon, sulfur, phosphorus, and after the alloy is melted evenly in the furnace, it will be out of the furnace for 20 % of molten iron, immediately add the remaining scrap iron filings to the molten iron to melt into molten iron;

[0033] 3) Casting: adjust the rotational speed of the centrifugal pouring machine according to the inner diameter of the product, heat the metal mold on the centrifugal pouring machine to 350°C, spray the release coating, add the molten iron...

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

No PUM Login to View More

Abstract

The invention discloses a cast iron material for producing a valve seat ring. The cast iron material comprises, by mass percentage, 0.05-0.15% of boron, 1.5-2.5% of chromium, 0.5-1.5% of copper, 0.05-0.1% of titanium, 1.5-2.5% of manganese, 2.2-3.2% of silicon, not larger than 0.08% of sulfur, not larger than 0.08% of phosphorus and the balance iron. The invention further provides a production method for the valve seat ring. The production method for the valve seat ring sequentially comprises the following steps of material preparing, smelting, casting and machining. The material is suitable for high-speed impact under the high-temperature corrosive environment, the service life of the valve seat ring is prolonged greatly, and the cost of the raw materials is low; and by the adoption of the method, the high-temperature tempering step is not needed, the production time is shortened, and the production cost is lowered.

Description

technical field [0001] The invention relates to a high-speed impact-resistant material, in particular to a cast iron material used for producing a valve seat ring, and also to a production method of the valve seat ring. Background technique [0002] The engine valve seat is subjected to the high-speed impact of the valve in high temperature and corrosive environment. The valve seat produced by the current cast iron material has a low service life, the production process is complex and includes precious metal materials such as vanadium and molybdenum, and the production cost is high; the valve seat is cast The production process includes powder metallurgy or smelting of various materials to produce white structure, and then tempered at high temperature. The production process is long and the production cost is high. Therefore, it is necessary to improve the material for the production of valve seat rings to simplify the complex production process. Contents of the invention ...

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 Patents(China)
IPC IPC(8): C22C37/10B22D13/00
CPCB22D13/00C22C37/06C22C37/10
Inventor 汪德会
Owner GUIZHOU JINMO SCI INDAL & TRADE