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High-hardness oil spray nozzle and manufacturing method thereof

A manufacturing method and technology of fuel injection nozzles, which are applied in the direction of manufacturing tools, fuel injection devices, furnace types, etc., can solve the problems of low hardness and poor wear resistance, achieve long working life, improve mechanical properties, and prevent thermal cracking trends. Effect

Inactive Publication Date: 2018-03-27
徐州艾梅尼克工程机械有限公司
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  • Claims
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Problems solved by technology

[0004] Aiming at the problems of low hardness and poor wear resistance of the fuel injector during high-temperature use, the present invention proposes a high-hardness fuel injector and a manufacturing method thereof. The components of the fuel injector are more reasonable and the working life is longer. It is easier to manufacture, can greatly improve the mechanical properties of the injector, and can meet the needs of high temperature, high hardness and high wear resistance

Method used

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Embodiment Construction

[0020] The present invention will be further described below:

[0021] High-hardness fuel injector, the composition of the fuel injector by mass percentage is as follows: C 0.7~2.11%, Cr 15~25%, Mo0.5~1.7%, Si ≤0.08%, Ni 0.05~0.2%, Mn 0.07~ 1.02%, P ≤0.08%, S ≤0.06%, and the balance is Fe.

[0022] A high-hardness fuel injector and its manufacturing method, comprising the following steps:

[0023] (1) Material preparation: Prepare materials according to the following weight percentages: C 0.7%, Cr 15%, Mo 0.5%, Si ≤0.08%, Ni0.05%, Mn 0.07%, P ≤0.08%, S ≤0.06%, and the rest The amount is Fe;

[0024] (2) After the above raw materials are melted;

[0025] (3) After it is completely melted, add it to the medium, then add manganese and silicon for deoxidation, take samples to adjust the composition to the requirements, and the molten iron enters the pouring process at 1500-1530 °C;

[0026] (4) In the pouring process, the castings are immediately cooled by heat preservation af...

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Abstract

A high-hardness fuel injector and a manufacturing method thereof belong to the technical field of diesel engine equipment. The components of the fuel injector by mass percentage are as follows: C 0.7-2.11%, Cr 15-25%, Mo 0.5-1.7%, Si≤0.08%, Ni 0.05~0.2%, Mn 0.07~1.02%, P≤0.08%, S≤0.06%, the balance is Fe. The composition of the invention is novel, and the manufacturing process is reasonable and clear. In the process, thermal insulation and cooling after pouring are adopted to prevent the thermal cracking tendency of the fuel injector. Compared with the traditional manufacturing method of the fuel injector, the components of the fuel injector of the present invention It is more reasonable, has a longer working life, and is easier to manufacture. It greatly improves the mechanical properties of the fuel injector and meets the needs of high temperature, high hardness and high wear resistance.

Description

technical field [0001] The invention belongs to the technical field of diesel engine equipment, and relates to a fuel injector and a manufacturing method thereof, in particular to a high-hardness fuel injector and a manufacturing method thereof. Background technique [0002] Cast iron in which carbon exists in the form of cementite, its cross-section is off-white. It is a good anti-wear material and works under abrasive wear conditions. White cast iron includes ordinary white cast iron, low alloy white cast iron, medium alloy white cast iron and high alloy white cast iron. [0003] Although the existing white cast iron materials can achieve higher hardness, they still cannot meet the requirements of some wear-resistant castings in the real industry that require higher hardness and longer life under high temperature conditions: if the temperature is greater than 400 ° C, in special High-temperature wear-resistant sleeves of furnace door shafts in automatic heating equipment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/56C21D1/18C21D9/00C22C38/02C22C38/04C22C38/44F02M61/18
CPCC22C38/04C21D1/18C21D9/0068C22C38/02C22C38/44C22C38/56F02M61/166F02M61/168F02M61/18
Inventor 缪伟
Owner 徐州艾梅尼克工程机械有限公司
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