Solid Rare Earth Nitriding Catalyst

A permeation accelerator and nitriding technology, which is applied in the field of solid rare earth nitriding and permeation catalyst, can solve the problems of high power consumption, low efficacy, and long time, and achieve the effects of low production cost, convenient use, and improved brittleness

Inactive Publication Date: 2011-12-07
哈尔滨意锋稀土材料开发有限公司
View PDF5 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no rare earth permeation catalyst for nitriding on the market, so the defects of traditional n

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
  • Solid Rare Earth Nitriding Catalyst
  • Solid Rare Earth Nitriding Catalyst

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] An enterprise in Chengdu uses the solid rare earth nitriding catalyst of the present invention:

[0023] (1) Equipment and process:

[0024] Production equipment: controllable well type nitriding furnace, 80KW; parts material 38CrMoAl; technical quality requirements: permeated layer 0.4mm, hardness above HV850; original production process see figure 1 Shown: Nitriding holding time is 72 hours. The production process using rare earth nitriding is figure 2 , The nitriding holding time used is 40 hours. Shorten the time by 32 hours, increase the permeation rate by more than 40%; save ammonia consumption by 2 times, and have obvious energy-saving and emission-reduction effects.

[0025] (2) use 5 rare earth infiltrating agents of the present invention, pack into the nitriding furnace together with the workpiece, adopt the production process of the rare earth nitriding described in (1) in the example 1 to produce, can obtain the (1) in the example 1 ) of the results des...

example 2

[0027] An enterprise in Chongqing uses the rare earth infiltrator of the present invention:

[0028] (1) Equipment and process:

[0029] Production equipment: controllable well type nitriding furnace, 90KW; parts material 42CrMo; technical quality requirements: permeated layer 0.4mm, hardness above HV580; the original production process adopts 520°C, and the nitriding holding time is 40 hours. After nitriding, the surface hardness can reach HV620; after nitriding with rare earth, the rare earth infiltration accelerator of the present invention is used, the production process is 540°C, and the nitriding holding time is 16 hours. The penetration layer reaches 0.4mm, the surface hardness reaches HV730, and the brittleness: 0--1 level. Compared with the original process, the time is shortened by 24 hours and the permeation rate is increased by 60%.

[0030] (2) use 5 rare earth infiltrating agents of the present invention, be placed in iron can, pack into nitriding furnace toget...

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 is a solid rare earth nitriding infiltration accelerator, which is composed of the following ingredients uniformly mixed by weight percentage: 50-90% of rare earth chloride, 5-30% of ammonium chloride and 5-20% of urea. The rare earth permeation agent is a paste solid, packed in a wax-sealed carton with a plastic film, and then put into an iron can and put into a gas nitriding furnace together with the nitriding workpiece for use. The permeation accelerator of the invention has the advantages of simple preparation, convenient use, 30-60% increase in nitriding speed, energy saving, and increased workpiece surface hardness HV50-150.

Description

Technical field: [0001] The invention relates to a solid rare earth nitriding catalyst. Background technique: [0002] Nitriding is a common chemical heat treatment method for the surface of metal workpieces. At a certain temperature, active nitrogen atoms are infiltrated into the surface of metal workpieces to form a compound layer, which changes the phase structure of the surface of metal workpieces, thereby improving the mechanical properties of the surface of metal workpieces, corrosion resistance, Obtain good wear resistance, fatigue resistance. However, in the conventional gas nitriding process, there are problems and defects such as long time, low efficacy, large power consumption, and large exhaust gas emissions. Many heat treatment professionals are working hard to find new ways to overcome the shortcomings of the nitriding process. Harbin Institute of Technology's new invention "Application Method of Rare Earth in Gas Nitriding and Carbonitriding Process" Patent ...

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): C23C8/24
Inventor 刘志儒闫牧夫刘成友吕军成张国良王德欣李建华向文明
Owner 哈尔滨意锋稀土材料开发有限公司
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