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Novel metal heat treatment method

A heat treatment method and metal technology, applied in the direction of heat treatment equipment, quenching agent, manufacturing tools, etc., can solve the problems of uneven cooling of the workpiece surface, tension, fracture, etc., to avoid deformation and cracking, reduce thermal stress, and improve cooling. effect of speed

Inactive Publication Date: 2016-08-03
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And cause the surface of the workpiece to cool unevenly, so that tension occurs, and the result may be deformed or even broken
First of all, with elongated workpieces, such as shafts, deformations can be particularly pronounced and these workpieces are economically unsatisfactory scrap due to mostly small tolerances

Method used

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  • Novel metal heat treatment method
  • Novel metal heat treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of heat treatment method of novel metal, carry out successively according to following steps:

[0020] Step 1: Provide a heating cylinder, set a pretreatment channel and a heating channel in the heating cylinder, and set a material inlet and a material outlet on the heating cylinder;

[0021] Step 2: Set a liquid chamber on the pretreatment channel, set a protective liquid in the liquid chamber, and spray the protective liquid through the nozzle to the workpiece entering from the feed port;

[0022] Step 3: Put the sprayed workpiece into the heating channel and heat it under the protection of nitrogen;

[0023] Step 4: After taking the heated workpiece out of the heating barrel, pre-cool it in the air, pre-cool it to a certain temperature, and then put it into the quenching cooling medium for cooling. The quenching cooling medium is: 10% sodium chloride aqueous solution, 20°C.

[0024] Wherein: each raw material of the protective solution described in step 2 an...

Embodiment 2

[0027] A kind of heat treatment method of novel metal, carry out successively according to following steps:

[0028] Step 1: Provide a heating cylinder, set a pretreatment channel and a heating channel in the heating cylinder, and set a material inlet and a material outlet on the heating cylinder;

[0029] Step 2: Set a liquid chamber on the pretreatment channel, set a protective liquid in the liquid chamber, and spray the protective liquid through the nozzle to the workpiece entering from the feed port;

[0030] Step 3: Put the sprayed workpiece into the heating channel and heat it under the protection of nitrogen;

[0031] Step 4: After taking the heated workpiece out of the heating barrel, pre-cool it in the air, pre-cool it to a certain temperature, and then put it into the quenching cooling medium for cooling. The quenching cooling medium is: 10% sodium chloride aqueous solution, 20°C.

[0032] Wherein: each raw material of the protective solution described in step 2 an...

Embodiment 3

[0036] A kind of heat treatment method of novel metal, carry out successively according to following steps:

[0037] Step 1: Provide a heating cylinder, set a pretreatment channel and a heating channel in the heating cylinder, and set a material inlet and a material outlet on the heating cylinder;

[0038] Step 2: Set a liquid chamber on the pretreatment channel, set a protective liquid in the liquid chamber, and spray the protective liquid through the nozzle to the workpiece entering from the feed port;

[0039] Step 3: Put the sprayed workpiece into the heating channel and heat it under the protection of nitrogen;

[0040] Step 4: After taking the heated workpiece out of the heating barrel, pre-cool it in the air, pre-cool it to a certain temperature, and then put it into the quenching cooling medium for cooling. The quenching cooling medium is: 10% sodium chloride aqueous solution, 20°C.

[0041] Wherein: each raw material of the protective solution described in step 2 an...

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Abstract

The invention belongs to the technical field of metal-material heat treatment, and particularly relates to a novel metal heat treatment method. The heat treatment method includes the steps that a pretreatment channel and a heating channel are formed in a heating cylinder, and a feeding opening and a discharging opening are formed in the heating cylinder; a liquid cavity is formed in the pretreatment channel, and protecting liquid is arranged in the liquid cavity, and is sprayed to workpieces entering the liquid cavity from the feeding opening through a spraying head; the sprayed workpieces are put into the heating channel and heated under protection of nitrogen; the heated workpieces are taken from the heating cylinder to be precooled in air to be at the certain temperature, then put into quenching cooling media and cooled. Under the conditions that the hardness of quenched workpieces and the depth of a hardening layer is not decreased, the heat stress of the workpieces can be greatly reduced, and deformation and cracking can be avoided. The heat stability of the metal can be improved through the protecting liquid, dirt can not be generated in the heating process, and discoloring can not be generated during heating.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of metal materials, and in particular relates to a novel metal heat treatment method. Background technique [0002] Metal heat treatment is a process to improve the performance of metal materials and their products (such as machine parts, tools, etc.). It refers to several processes such as heating a metal or alloy to a certain temperature and keeping it for a certain time in a solid state, then raising the temperature to a certain temperature and keeping it for a certain time, etc., the ultimate purpose is to make it deform accordingly and become various organizational structures. , so as to obtain the required performance of a thermal processing process. Different heating speeds, different holding times and different cooling methods constitute different heat treatment processes. It can be seen that in the heat treatment process, the temperature control accuracy is the key to determine th...

Claims

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Application Information

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IPC IPC(8): C21D1/18C21D1/70C21D1/60
CPCC21D1/18C21D1/60C21D1/70
Inventor 陈孝文张德芬唐瑜李仁仆谭盖朱亚杨阳韩金理张程
Owner SOUTHWEST PETROLEUM UNIV