Surface thermal treatment process for metal workpiece

A technology for surface heat treatment and metal parts, which is used in heat treatment equipment, manufacturing tools, quenching agents, etc., can solve the problems of unpredictable heat treatment effect, large deformation of metal workpieces, affecting service life, etc., saving energy consumption and improving resistance. Tensile strength, anti-shedding effect

Inactive Publication Date: 2019-12-20
徐州彭圆锻造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These processes are connected with each other and cannot be interrupted; in the current metal heat treatment process, the number of heating and tempering is generally small, the heat treatment effect is often not as expected, and the metal tends to retain more processing stress, which directly affects the service life
[0003] At present, the existing metal surface heat treatment technology, due to the single process, has a large deformation of the metal workpiece and high cost. It is urgent for those skilled in the art to develop a new metal surface heat treatment process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A heat treatment process for the surface of metal parts, said process comprising the following steps:

[0022] Step 1: Metal parts are pickled in hydrochloric acid solution, ultrasonic treatment is carried out in the later stage of treatment, and finally rinsed with pure water in sequence

[0023] Wash, dry and set aside;

[0024] Step 2: Heat the heating furnace to 1550°C, put the metal plates to be heat-treated into the heating furnace and burn them for later use;

[0025] Step 3: Soak the heat-treated metal plate in an aqueous solution for 12 minutes to realize heat treatment and rust removal on the metal surface;

[0026] Step 4: Put the metal parts into the vacuum heating machine and heat them by laser flame spraying, heating to a temperature of 1020°C, and continue heating for 15 minutes;

[0027] Step 5: Then transfer the normalized metal parts to the salt bath furnace until the temperature of the metal parts drops to 600 ° C, and then transfer the metal parts ...

Embodiment 2

[0035] A heat treatment process for the surface of metal parts, said process comprising the following steps:

[0036] Step 1: The metal parts are pickled in hydrochloric acid solution, ultrasonic treatment is performed in the later stage of treatment, and finally rinsed with pure water, dried, and set aside;

[0037] Step 2: Heat the heating furnace to 1700°C, put the metal plates to be heat-treated into the heating furnace and burn them for later use;

[0038] Step 3: Soak the heat-treated metal plate in an aqueous solution for 14 minutes to realize heat treatment and rust removal on the metal surface;

[0039] Step 4: Put the metal parts into the vacuum heating machine and heat them by laser flame spraying, heating to a temperature of 1020°C, and continue heating for 15 minutes;

[0040] Step 5: Then transfer the normalized metal parts to the salt bath furnace until the temperature of the metal parts drops to 625°C, and then transfer the metal parts to the air furnace for h...

Embodiment 3

[0048] A heat treatment process for the surface of metal parts, said process comprising the following steps:

[0049] Step 1: The metal parts are pickled in hydrochloric acid solution, ultrasonic treatment is performed in the later stage of treatment, and finally rinsed with pure water, dried, and set aside;

[0050] Step 2: Heat the heating furnace to 1850°C, put the metal plates to be heat-treated into the heating furnace and burn them for later use;

[0051] Step 3: Soak the heat-treated metal plate in an aqueous solution for 15 minutes to realize heat treatment and rust removal on the metal surface;

[0052] Step 4: Put the metal parts into the vacuum heating machine and heat them by laser flame spraying, heating to a temperature of 1020°C, and continue heating for 15 minutes;

[0053] Step 5: Then transfer the normalized metal parts to the salt bath furnace until the temperature of the metal parts drops to 650 ° C, and then transfer the metal parts to the air furnace for...

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PUM

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Abstract

The invention discloses a surface thermal treatment process for a metal workpiece. The process comprises the following steps: pickling the metal workpiece in a hydrochloric acid solution, performing ultrasonic treatment at a post-treatment period, and sequentially putting metal plates to be subjected to thermal treatment into a heating furnace to burn for later use; soaking the metal plates subjected to thermal treatment through an aqueous solution, and realizing metal surface thermal treatment rust-removal; putting the metal workpiece into a vacuum heater to heat by laser flame spraying, transferring a normalized metal workpiece into a salt bath furnace, transferring the metal workpiece into an air furnace to preserve heat, and transferring the annealed metal workpiece into a quenching furnace to perform high-temperature quenching. On the premise of guaranteeing performance, the surface thermal treatment process for the metal workpiece saves energy consumption, reduces production cost, improves tensile strength and percentage elongation after fracture, prevents dropping of oxide skin, reduces metal workpiece deformation, and guarantees metal workpiece quality.

Description

technical field [0001] The invention relates to a heat treatment process for the surface of metal parts, and relates to the field of heat treatment of metal parts. Background technique [0002] Thermal treatment process generally comprises heating, insulation, three processes of cooling, has only two processes of heating and cooling sometimes. These processes are connected with each other and cannot be interrupted; in the current metal heat treatment process, the number of heating and tempering is generally small, the heat treatment effect is often not as expected, and the metal tends to retain more processing stress, which directly affects the service life. [0003] At present, the existing metal surface heat treatment technology, due to the single process, has large deformation of the metal workpiece and high cost. It is urgently needed for those skilled in the art to develop a new metal surface heat treatment process. Contents of the invention [0004] The technical pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/08C21D1/09C21D1/18C21D1/28C21D1/60
CPCC21D1/08C21D1/09C21D1/18C21D1/28C21D1/60
Inventor 陈新韩长青王国华
Owner 徐州彭圆锻造有限公司
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