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Carbonitriding process of pump shaft of automobile engine

An automotive engine, carbonitriding technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of low processing efficiency, unsatisfactory processing products, etc., to improve quality, improve hardness, The effect of reducing the quenching stress

Inactive Publication Date: 2019-07-16
鑫光热处理工业(昆山)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a carbonitriding process for the pump shaft of an automobile engine, so as to solve the problems that the existing carbonitriding proposed in the background technology is not ideal for the processed products of the pump shaft of the automobile engine, and the processing efficiency is low.

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  • Carbonitriding process of pump shaft of automobile engine
  • Carbonitriding process of pump shaft of automobile engine

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0021] see figure 1 , an embodiment provided by the present invention: a carbonitriding process for an automobile engine pump shaft, comprising the steps of:

[0022] (A) Partially apply anti-seepage agent on the non-carbonitriding part, evenly brush the water-soluble anti-seepage agent on the top of the pump shaft of the automobile engine with a length of L1, and then let it dry naturally, and the air-dry time is 30-40min;

[0023] (B) Preheat the well-type gas carburizing furnace, and heat the well-type gas carburizing furnace to W1 for 10-20 minutes;

[0024] (C) Heating the workpiece. After the well-type gas carburizing furnace is preheated, drop 15-25ml of kero...

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Abstract

The invention discloses a carbonitriding process of a pump shaft of an automobile engine. The carbonitriding process comprises the following steps that (A) a non-carbonitriding part is partially coated with a permeability-reducing agent, after being evenly brushed with the water-soluble permeability-reducing agent, the area, with the length being L1, of the top end of the pump shaft of the automobile engine is subjected to natural air drying, and the air drying time ranges from 30 min to 40 min; (B), a well type gas carburizing furnace is preheated and is heated till W1 keeps from 10 min to 20min; and (C) a workpiece is heated, after preheating of the well type gas carburizing furnace is finished, 15-25 ml of kerosene is dripped into the furnace bottom, after waiting for the time T1, theair-dried pump shaft of the automobile engine is put into the well type gas carburizing furnace, a furnace cover is closed, and heating is carried out again and lasts for T2. Partial carbonitriding and cold treatment are achieved, consumed time is short, the partial hardness needed for the workpiece is improved, the depth of a carburized layer is large, and product quality is good.

Description

technical field [0001] The invention relates to the technical field of carbonitriding process for an automobile engine pump shaft, in particular to a carbonitriding process for an automobile engine pump shaft. Background technique [0002] A chemical surface heat treatment process in which carbon and nitrogen are infiltrated into the surface of steel parts at the same time. Mainly carburized, with a small amount of nitrogen infiltrated. Because the carbonitriding process used percyanic salt or cyanide-containing atmosphere as the infiltration agent in the early stage, it is also called "cyanidation". According to the state of co-infiltration medium, it is divided into three categories: gas, liquid and solid. Solid and liquid carbonitriding has rarely been used. The gas carbonitriding method does not use cyanide salt, it is easy to control the surface quality, it can realize mechanization and automation, and it is widely used. Compared with carburizing, it has the advanta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/04C23C8/32C23C8/80C21D1/18
CPCC21D1/18C23C8/04C23C8/32C23C8/80
Inventor 王昭
Owner 鑫光热处理工业(昆山)有限公司
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