Nitriding process for H13 die steel

A technology of mold steel and process, applied in the field of nitriding heat treatment process, can solve the problems of hard and brittle, unsuitable for impact load, large impact load, etc., achieve uniform surface hardness, shorten nitriding time, and improve surface hardness

Inactive Publication Date: 2016-03-02
TAICANG JIUXIN PRECISION MOLD
View PDF4 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vein-like structure is mainly distributed inside the infiltrated layer, while the white layer is mainly covered on the metal surface; this type of nitrogen-iron compound has good wear resistance, but it is hard and brittle at the same time, and is not suitable for impact loads, especially for applications Dies in high-speed forging equipment, such as H13 die steel materials, when processing nitrided dies, the impact load is large, and cold and

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nitriding process for H13 die steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A nitriding process for H13 die steel, including the following steps:

[0025] 1) H13 die steel undergoes hardness screening after quenching and tempering process, and the control quenching and tempering process parameters are: quenching and tempering process: H13 die steel is heated to 1030°C and then quenched and tempered at 500°C to screen out austenite H13 die steel with a content of 5%;

[0026] 2) Use acetone to clean the surface oil stains of the H13 mold steel screened out in step 1), and then polish the surface;

[0027] 3) Put the H13 mold steel pretreated in step 2) into a vacuum gas nitriding furnace, evacuate to 1 mbar, and pour in nitrogen at a flow rate of 1.5L / h for re-pressure, and maintain a positive pressure;

[0028] 4) Pour nitrogen, carbon dioxide, and ammonia into the vacuum gas nitriding furnace, heat it to 520-530°C, maintain the nitrogen potential at 3.9, keep it for 6 hours, and enter the strong infiltration stage;

[0029] 5) Pour nitrogen, carbon dio...

Embodiment 2

[0032] A nitriding process for 1.2367 die steel, including the following steps:

[0033] 1) The hardness of 1.2367 die steel is screened after quenching and tempering. The process parameters of quenching and tempering are controlled as follows: 1.2367 die steel is heated to 1030℃ and then quenched and tempered at 500℃, and 1.2367 with austenite content of 5% is selected. Die steel

[0034] 2) Use acetone to clean the surface oil stains of the 1.2367 mold steel screened out in step 1), and then polish the surface;

[0035] 3) Put the 1.2367 die steel pretreated in step 2) into a vacuum gas nitriding furnace, evacuate to 1 mbar, and pour in nitrogen at a flow rate of 1.5L / h for re-pressure, and maintain a positive pressure;

[0036] 4) Pour nitrogen, carbon dioxide, and ammonia into the vacuum gas nitriding furnace, heat it to 520-530°C, maintain the nitrogen potential at 3.6, keep it for 6 hours, and enter the strong infiltration stage;

[0037] 5) Pour nitrogen, carbon dioxide, and amm...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a nitriding process for H13 die steel. The nitriding process for the H13 die steel comprises the following steps of quenching and tempering the H13 die steel, and then performing hardness screening; cleaning and polishing the surface of the H13 die steel; putting the H13 die steel in a vacuum type gas nitriding furnace, vacuumizing, then introducing nitrogen to recover pressure, and keeping positive pressure; heating at an intensive carburizing stage and a diffusing stage, and insulating for a period of time; cooling to complete nitriding treatment. According to the nitriding process for the H13 die steel, harmful structures are effectively controlled when the H13 die steel is nitridized, so that the service life of a die is greatly prolonged, thereby reducing the cost and the rejection rate.

Description

Technical field [0001] The invention relates to the technical field of nitriding heat treatment technology, in particular to a nitriding process for H13 die steel. Background technique [0002] H13 die steel has become a widely used die steel in the world because of its high strength, high toughness, good tempering stability, high resistance to cold and heat fatigue and moderate price. Forging dies, hot extrusion dies, mandrels, forging dies for forging, forging dies on precision forging machines, forging dies on presses, and die-casting dies for copper, aluminum and their alloys, etc.; when used as hot work molds, they are repeatedly in service In contact with high-temperature processing materials, under the action of periodic alternating stress, the mold material, especially the surface structure, will change, and the performance will change accordingly, which will eventually lead to failure. The main failure modes are thermal fatigue and thermal wear. , Corrosion and plastic ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C23C8/26C21D1/18
CPCC23C8/26C21D1/18
Inventor 张晨权仁泽
Owner TAICANG JIUXIN PRECISION MOLD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap