Piston ring material for internal combustion engine

一种活塞环、内燃机的技术，应用在活塞环、机械设备、发动机元件等方向，能够解决差耐擦伤性等问题，达到贡献大、避免结构控制、优异自润滑性能的效果

Active Publication Date: 2011-02-16
PROTERIAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although steel piston rings have greater strength and improved fatigue and wear resistance properties compared to cast iron piston rings, their poor galling resistance is the reason why steel is difficult to use for the second ring one

Method used

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  • Piston ring material for internal combustion engine
  • Piston ring material for internal combustion engine
  • Piston ring material for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] 10 kg of an ingot having a predetermined composition was prepared by melting in a vacuum induction melting furnace. Table 1 shows the chemical compositions of Materials 1 to 9 according to the present invention and Comparative Materials 11 to 14. For those with added titanium, zirconium, the ratio of titanium, zirconium to sulfur is also shown.

[0054]

[0055] Next, the ingot was hot worked to form a 15 mm square rod, and the material was annealed. A part of the obtained annealed material was processed into a shape of a specimen for a tensile test having a parallel portion length of 45 mm and a parallel portion diameter of 7 mm. The samples were subjected to a tensile test for evaluating the drawing workability and rolling workability of the wire. The results are shown in Table 2. Table 2 demonstrates that the material according to the invention has a reduction of area after annealing of not less than about 40%, indicating good cold workability. Even if a part ...

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Abstract

A piston ring material is provided which retains excellent mechanical properties and processability, which are required of piston ring materials, and has wearing resistance and scuffing resistance, which are sliding properties required of piston rings. The piston ring material, which is for use in internal combustion engines, contains, in terms of mass%, 0.3-0.8% carbon, 0.1-3.0% silicon, 0.1-3.0% manganese, 0.01-0.3% sulfur, 0.1-2.0% chromium, and 0.05-2.0% the sum of titanium and / or zirconium, with the remainder being iron and incidental impurities. The titanium and / or zirconium contained in the piston ring material and the sulfur contained therein satisfy the following relationship. [Ti (%) + 1 / 2Zr (%)] / S (%) = 5.0 Preferably, the material may contain one or more members selected from up to 1.0% copper, less than 3.0% molybdenum, up to 1.0% aluminum, and less than 2.0% nickel, in terms of mass%.

Description

technical field [0001] The present invention relates to a piston ring material for an internal combustion engine, and more particularly, to a piston ring material having excellent scuffing performance and wear resistance on sliding surfaces. Background technique [0002] Piston rings in internal combustion engines, especially automobile engines, were hitherto made of cast iron, but have been replaced by so-called steel piston rings, which are manufactured by forming wires, such as flat steel wires, into ring shapes. This is because the rings need to be thinned, or their mechanical strength increased to meet the requirements of light weight, low fuel consumption, high speed and high output of internal combustion engines. Another main reason is the advantage of significantly shortening the manufacturing process of the ring. [0003] The replacement with steel piston rings is first carried out in the first piston ring (topring) or oil ring in the high load area, and uses such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J9/26C22C38/00C22C38/60F02F5/00
CPCC22C38/60C22C38/18C22C38/42C22C38/50C21D9/40C22C38/58C22C38/06C22C38/04C22C38/02C22C38/44C22C38/34C22C38/38F02F5/00F16J9/26
Inventor 大石胜彦上原利弘久保田邦亲
Owner PROTERIAL LTD
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