Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Three-stage carbon-nitrogen-boron ternary gas deep co-infiltration method for low carbon nickel molybdenum steel

A ternary gas, nickel-molybdenum steel technology, applied in coating, solid-state diffusion coating, metal material coating process, etc., can solve the problem that cannot meet the requirements of high hardness and high wear resistance, deep infiltration of N or co-infiltration technology Insufficient, affecting the impact toughness performance indicators and other problems, to achieve the effect of good hardness, fatigue life improvement, hardness improvement

Active Publication Date: 2021-08-17
XI'AN PETROLEUM UNIVERSITY
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patented technology only considers the low-temperature co-infiltration shallow co-infiltration technology, the thickness of the carburizing layer is only 0.3mm, mainly carburizing (C) and nitriding (N), and the infiltration amount of boron (B) is seriously insufficient at low temperature , which affects the impact toughness performance index, and cannot meet the requirements of high hardness, high wear resistance and high impact resistance parts such as oil drilling bits, etc.
At present, the low-carbon nickel-molybdenum steel (such as 20Ni 3 Mo, 20Ni 4 Mo, etc.) carbonitriding boron co-infiltration technology can only obtain co-infiltration layer thickness less than 0.7mm. appear insufficient

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
  • Three-stage carbon-nitrogen-boron ternary gas deep co-infiltration method for low carbon nickel molybdenum steel
  • Three-stage carbon-nitrogen-boron ternary gas deep co-infiltration method for low carbon nickel molybdenum steel
  • Three-stage carbon-nitrogen-boron ternary gas deep co-infiltration method for low carbon nickel molybdenum steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment includes the following steps:

[0021] (1) Prepare a boron-donating agent, by weight percentage, 2% of lanthanum oxide rare earth, 5% of boron carbide, 15% of potassium fluoroborate, and the balance is silicon carbide, uniformly mixed and bonded and dried into a solid block; in addition, Prepare the carbon-nitrogen co-infiltration solution, the co-infiltration solution is calculated by mass percentage, and is composed of 50% carbonamide, 40% sodium carbonate and 10% sodium chloride;

[0022] (2) The 20Ni to be processed 4 The Mo steel drill bit workpiece is placed in a drop-controlled carburizing furnace, heated to 860°C, and exhausted for 1 hour;

[0023] (3) The three-stage co-infiltration method is used to carry out the gas three-component deep co-infiltration process

[0024] 3.1. The first stage is mainly carburizing. The initial heating temperature is 860°C for 2 hours and then carburizing. Among them, methanol is 40 drops / minute, kerosene is 120...

Embodiment 2

[0033] This embodiment includes the following steps:

[0034] (1) Prepare a boron-donating agent, by weight percentage, 2% of lanthanum oxide rare earth, 5% of boron carbide, 15% of potassium fluoroborate, and the balance is silicon carbide, uniformly mixed and bonded and dried into a solid block; in addition, Prepare the carbon-nitrogen co-infiltration solution, the co-infiltration solution is calculated by mass percentage, and is composed of 50% carbonamide, 40% sodium carbonate and 10% sodium chloride;

[0035] (2) The 20Ni to be processed 4 The Mo steel drill bit workpiece is placed in a drop-controlled carburizing furnace, heated to 860°C, and exhausted for 1 hour;

[0036] (3) The three-stage co-infiltration method is used to carry out the gas three-component deep co-infiltration process

[0037] 3.1. The first stage is mainly carburizing. The initial heating temperature is 860°C for 2 hours and then carburizing. Among them, methanol is 40 drops / minute, kerosene is 120...

Embodiment 3

[0046] This embodiment includes the following steps:

[0047] (1) Prepare a boron-donating agent, by weight percentage, lanthanum oxide rare earth 2.5%, boron carbide 10%, potassium fluoroborate 15%, and the balance is silicon carbide, uniformly mixed and bonded and dried into a solid block; in addition, Prepare the carbon-nitrogen co-infiltration solution, the co-infiltration solution is calculated by mass percentage, and is composed of 50% carbonamide, 40% sodium carbonate and 10% sodium chloride;

[0048] (2) The 20Ni to be processed 4 The Mo steel drill bit workpiece is placed in a drop-controlled carburizing furnace, heated to 860°C, and exhausted for 1 hour;

[0049] (3) The three-stage co-infiltration method is used to carry out the gas three-component deep co-infiltration process

[0050] 3.1. The first stage is mainly carburizing. The initial heating temperature is 860°C for 2 hours and then carburizing. Among them, methanol is 40 drops / minute, kerosene is 140 drops...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

Three-stage carbon-nitrogen-boron ternary gas deep co-infiltration method for low-carbon nickel-molybdenum steel. The low-carbon nickel-molybdenum steel is placed in the carburizing furnace and added with kerosene, anhydrous methanol, liquid ammonia, boric acid and oxidation. The co-infiltration agent composed of lanthanum, using the chemical heat treatment method under the action of lanthanum oxide and other catalysts, adopts the three-stage ternary gas co-infiltration process, and finally obtains fine acicular martensite, nitrides and borides on the surface, which greatly improves the durability of parts. Hardness and wear resistance; the method of the present invention has low cost, simple and controllable process, and provides technical support for the production of high-strength and high-wear-resistant surface-modified drill bits, so it has a wide range of applications in the fields of precision machining, national defense industry, and oil drilling. prospect.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a three-stage carbon-nitrogen-boron ternary gas deep co-infiltration method for low-carbon nickel-molybdenum steel. Background technique [0002] The drill bit is an important tool for oil drilling. The drill bit for oil drilling plays the role of impacting, crushing and shearing the formation rock when it rotates. Its working performance will directly affect the drilling quality, drilling efficiency and drilling cost. Carbon technology has gradually become unsatisfactory. [0003] In recent years, scientific researchers have done a lot of work on the synthesis and preparation of boron carbon nitrogen materials, among which the ternary co-infiltration has a relevant research basis. As disclosed in the Chinese patent application "A boron-carbon-nitrogen ternary co-infiltration method" (application number: CN02109879.4) with the publication number CN1442504A, a solid boron supply agen...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/58C23C8/46C23C8/42C23C8/56
CPCC23C8/42C23C8/46C23C8/56C23C8/58
Inventor 付甲魏胜利
Owner XI'AN PETROLEUM UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com