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Method for conducting steel and iron material part non-oxidation heating through solid carburization agent

A non-oxidation heating and steel material technology, applied in the field of non-oxidation heating of steel material parts, can solve the problems of unstable processing quality, difficult mass production, difficult operation, etc., to eliminate oxidation, slow cooling speed, and wide source of materials Effect

Active Publication Date: 2018-04-27
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high cost, difficult operation, unstable processing quality and difficult mass production in the existing non-oxidation heating method, and to provide a method for non-oxidation heating of iron and steel parts by using a solid carburizing agent

Method used

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Examples

Experimental program
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specific Embodiment approach 1

[0011] Embodiment 1: In this embodiment, a method for using a solid carburizing agent to carry out non-oxidative heating of iron and steel parts is specifically carried out in the following steps:

[0012] 1. Cleaning the surface of the steel material part to obtain a clean steel material part; the solid solution contained in the steel material part is ferrite and the steel material has a critical point AC1 temperature;

[0013] 2. Spread a layer of solid carburizing agent with a thickness of 25mm to 40mm on the bottom of the iron box, and evenly place clean steel parts on the solid carburizing agent at the bottom of the iron box. Multiple layers can be placed, and parts There is a distance of 10mm to 15mm between the parts and between the parts and the iron box wall. Fill the solid carburizing agent in the gap between the parts and the parts and the iron box wall and compact it, and then in the Lay a layer of solid carburizing agent with a thickness of 30mm to 50mm on the upp...

specific Embodiment approach 2

[0020] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the iron and steel parts described in step 1 are carbon steel, alloy steel, cast iron or alloy cast iron. Others are the same as the first embodiment.

specific Embodiment approach 3

[0021] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that: the solid carburizing agent described in step 2 is made up of 90% charcoal particles and 10% infiltrating agent; The particle size is 8mm ~ 12mm. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a steel and iron part non-oxidation heating method, in particular to a method for conducting steel and iron material part non-oxidation heating through a solid carburization agent. The method for conducting steel and iron material part non-oxidation heating through the solid carburization agent solves the problem that existing non-oxidation heating manners are high in cost, difficult to operate, unstable in machining quality and not prone to achieving volume production. According to the method, parts are embedded into an iron box filled with the solid carburization agent to be sealed, and then the iron box is contained into a common heating furnace to be heated; and in the heating process, the parts are in complete contact with reducing atmosphere in the box, oxidation is avoided, and non-oxidation heating is achieved. The method is used for steel and iron material part hot machining.

Description

technical field [0001] The invention relates to a non-oxidizing heating method for iron and steel parts. Background technique [0002] The oxidation of steel and cast iron with AC1 and similar materials containing other elements during heat treatment can cause the surface of the part to be burned, rough and deteriorated, and its performance is reduced, resulting in waste. The basic principle of non-oxidation heating is to avoid oxidation between the surface of the part and the heating medium. In order to achieve oxidation-free heating, the furnace gas used to heat the parts must be a non-oxidizing or reducing atmosphere. Today's non-oxidizing heating equipment or methods generally include protective atmosphere furnaces, vacuum furnaces, ammonia thermal decomposition atmosphere protection furnaces, nitrogen-based atmosphere protection furnaces, and dripping protective atmosphere furnaces. Other protective heating media, such as fluidized Furnace, salt bath furnace or buried...

Claims

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Application Information

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IPC IPC(8): C21D1/70
Inventor 高枝森蒲海亮王淑新徐佰明马春滨周策曹利峰林延伟李应新陈军
Owner HARBIN TURBINE