An intake valve for an internal combustion engine

A technology for intake valves and internal combustion engines, which is applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of high cost of intake valves and failure to meet the higher performance requirements of the engine, and achieve easy solidification speed and non-destructive flaw detection There is no abnormality and the effect of ensuring high temperature resistance

Active Publication Date: 2019-04-12
泰州市龙瑞阀业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-pressure intake air of internal combustion engine puts forward very high requirements on the intake valve. The material performance requirements of the head and the stem of the intake valve of the internal combustion engine are different. The stem needs better wear resistance, while the head needs better mechanical properties and High temperature resistance, while the cost of the intake valve produced by a single material in the prior art is high, and it cannot meet the requirements of the rapidly developing engine for its higher performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] An intake valve for an internal combustion engine,

[0021] The intake valve includes a valve head and a valve stem, wherein the intake valve head is made of titanium alloy, and the intake valve stem is made of iron-based alloy. The manufacturing method of the intake valve includes the following steps: first, ingredients are prepared according to the mass percentage of the following elements : Ni 0.8%, Mo 0.7%, V 0.55%, Cr 0.4%, B 0.1%, Mn 0.08%, Ca 0.06%, Mg 0.04%, Bi 0.03%, La0.01%, the balance is Ti; The arc melting method is used for melting and casting into titanium alloy ingots. The titanium alloy ingots are heated to 1040 °C and kept for 1 hour. After that, the ingots are forged with a forging machine. The forging ratio is 1.7; The temperature is 860°C; then the temperature is lowered to 750°C for 1 hour, air cooled to room temperature, and the first forged blank is obtained, and the first forged blank is reheated to 890°C, kept for 0.5 hour, and then the first f...

Embodiment 2

[0027] An intake valve for an internal combustion engine,

[0028] The intake valve includes a valve head and a valve stem, wherein the intake valve head is made of titanium alloy, and the intake valve stem is made of iron-based alloy. The manufacturing method of the intake valve includes the following steps: first, ingredients are prepared according to the mass percentage of the following elements : Ni 1%, Mo 0.8%, V 0.55%, Cr 0.3%, B 0.15%, Mn 0.09%, Ca 0.06%, Mg 0.045%, Bi 0.02%, La0.01%, the balance is Ti; The arc melting method is used to melt and cast titanium alloy ingots. The titanium alloy ingots are heated to 1060°C and kept for 1 hour. After that, the ingots are forged with a forging machine. The forging ratio is 1.8; The temperature is 850°C; after that, the temperature is lowered to 740°C and kept for 1.5 hours, then air-cooled to room temperature to obtain the first forging blank, which is reheated to 880°C and kept for 0.5 hours, and then the first forging blank...

Embodiment 3

[0034] An intake valve for an internal combustion engine,

[0035] The intake valve includes a valve head and a valve stem, wherein the intake valve head is made of titanium alloy, and the intake valve stem is made of iron-based alloy. The manufacturing method of the intake valve includes the following steps: first, ingredients are prepared according to the mass percentage of the following elements : Ni 0.9%, Mo 0.6%, V 0.6%, Cr 0.35%, B 0.1%, Mn 0.07%, Ca 0.065%, Mg 0.05%, Bi 0.02%, La0.015%, the balance is Ti; The arc melting method is used for melting and casting into titanium alloy ingots. The titanium alloy ingots are heated to 1050°C and kept for 1 hour, and then the ingots are forged with a forging machine. The forging ratio is 1.6; The temperature is 870°C; then the temperature is lowered to 760°C for 1 hour, air cooled to room temperature, and the first forged blank is obtained, and the first forged blank is reheated to 900°C, kept for 0.5 hours, and then the first fo...

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PUM

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Abstract

The invention discloses an air inlet valve for an internal combustion engine. The air inlet valve comprises an air inlet valve head and an air inlet valve lever, wherein the air inlet valve head is made of titanium alloys and the air inlet valve rod is made of iron-base alloys. A titanium alloy ingot is formed by pouring. After the titanium alloy ingot is heated to 1040-1060 DEG C, heat preservation is performed for 1 hour, and then the cast ingot is forged by a forging machine. According to the air inlet valve disclosed by the invention, the strength and the plasticity of materials of the titanium alloys are improved through alloying; and through two times of forging process, titanium alloy crystalline grains are refined, so that negative influences of temperature changes during smelting on mechanical properties of the titanium alloys are overcome.

Description

technical field [0001] The invention relates to an intake valve for an internal combustion engine, belonging to the technical field of internal combustion engines. Background technique [0002] The internal combustion engine improves its economy, power and emission performance by organizing the intake swirl. The high-pressure intake air of internal combustion engine puts forward very high requirements on the intake valve. The material performance requirements of the head and the stem of the intake valve of the internal combustion engine are different. The stem needs better wear resistance, while the head needs better mechanical properties and High temperature resistance, while the cost of the intake valve produced by a single material in the prior art is high, and it cannot meet the requirements of the rapidly developing engine for its higher performance. Contents of the invention [0003] In order to solve the above problems, the present invention provides an intake valv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L3/02B23P15/00
CPCB23P15/001F01L3/02F01L2303/01
Inventor 崔旺林
Owner 泰州市龙瑞阀业有限公司
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