Brazing of cutting materials

Tillmann, Wolfgang; Elrefaey, Ahmed; Wojarski, Lukas

doi:10.1533/9780857096500.3.423

Cited by 6 publications

(4 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our previous investigations revealed that argon ion etching followed by arc deposition of nickel in vacuum is vital to assure a sufficient wetting and joint quality for conventional AISI 18MAR300 material grades. [ 24,25 ] The high kinetic energy of the argon ions removed the oxide layer sufficiently, while the subsequntly applied coating of nickel in the vacuum atmosphere prevented the surface from reoxidation. With respect to the brazing alloy, it was found that palladium acts as a key element for wetting and enhances the tensile strength of the joint by solid solution strengthening of the Ag(Cu,Pd) phase.…”

Section: Introductionmentioning

confidence: 99%

Vacuum Brazing of 18MAR300 Nickel Maraging Steel Joints Based on Additively Manufactured and Conventional Material Grades

Tillmann

Henning

Wojarski

et al. 2023

steel research int.

View full text Add to dashboard Cite

Laser powder bed fusion (LPBF) processes offer the best possible design options for the production of highly complex components with unique functionalities. Although the development of additive manufacturing processes is progressing impressively and build rates have already been significantly increased, the economic production of high‐volume components is still particularly truncated. Comparatively expensive powders, machine‐hour rates, and a limited construction space demonstrate a high demand for joining LPBF components to conventionally manufactured parts. Vacuum brazing is an excellent technology for manufacturing and simultaneous heat treatment of such hybrid components. The aim of this study is to investigate the brazeability and the joint properties of ultrahigh‐strength nickel maraging steel 18MAR300 (1.2709, X3NiCoMoTi18‐9‐5) using BVAg‐30 (Ag68Cu27Pd5) as brazing filler metal. For this purpose, the effect of nickel‐plated surfaces on the wettability and the microstructure of the joint is studied for conv./conv.‐, LPBF/conv.‐, and LPBF/LPBF joints. Furthermore, the quasi‐static and quasi‐dynamic joint strength is evaluated. The results prove that nickel‐plated surfaces are vital to achieve a sufficient process control. The coating assures a deoxidized and sealed surface which favors the formation of NiCu(Fe,Pd,Ag) phases within the braze metal thus enhancing the joint strength. In addition, LPBF/LPBF joint features have significantly higher tensile strength than conv./conv. joints (825–627 MPa).

show abstract

Section: Introductionmentioning

confidence: 99%

Vacuum Brazing of 18MAR300 Nickel Maraging Steel Joints Based on Additively Manufactured and Conventional Material Grades

Tillmann

Henning

Wojarski

et al. 2023

steel research int.

View full text Add to dashboard Cite

show abstract

“…Sintered metals are a range of very hard, refractory, wear-resistant alloys made by powder metallurgy techniques [ 11 ]. The beginnings of sintered carbides’ production date back to 1923, when they were developed and patented.…”

Section: Introductionmentioning

confidence: 99%

An Improved Procedure for the Quality Control of Sintered Carbide Tips for Mining Applications, Based on Quantitative Image Analysis of the Microstructure

2021

View full text Add to dashboard Cite

Conical picks are tools that treat surfaces used in mining. Due to a wide variety of such tools, they need to characterise in diversified geometrical and material parameters, as well as durability. For the mining sector, evaluation of the conical picks is performed in order to verify their agreement with the manufacturer’s declaration, as well as with the requirements of the user. One of the whole research procedure elements is a qualitative and quantitative analysis of a pick tip made of sintered carbide (tungsten carbide–cobalt; WC-Co). It is currently carried out when the recipient is accepting such picks or when a complaint is made. In this case, it is important to propose such a research and control procedure that will make it possible to determine the quality of the applied material for pick tips in a straightforward, repeatable, and objective way. This article presents the results of investigations made on tips coming from four different types of conical picks. The tips’ hardness and density were measured, as well as WC grains which were characterised using two kinds of measurements (automated linear-intercept method and semi-automated planimetric methods). The measurements of the WC grains were conducted on microstructure images recorded using a light microscope. The performed investigations made it possible to compare tips and refer the results to those of other scientists’ studies. The final effect is a proposal of a specialised procedure examining picks, especially their tips, made of sintered carbides. This is important for the evaluation of the tips’ quality in light of the requirements of the relevant norms and the needs of the users from the mining and extractive sectors.

show abstract

“…Most commonly applied in machining of hardened materials is polycrystalline cubic boron nitride (PCBN). It is a material that displays high chemical stability event at temperatures exceeding 1400 °C, high impact strength and high resistance to thermal shock while being able to maintain its mechanical properties at high temperatures [9].…”

Section: Introductionmentioning

confidence: 99%

The Phonomenon of Material Side Flow During Finish Turning of EN X153CrMoV12 Hardened Steel with Tools Based on Polycrystalline Cubic Boron Nitride

Ociepa

Jenek

Feldshtein

et al. 2019

J. Superhard Mater.

View full text Add to dashboard Cite

The phonomenon of material side flow during finish turning of EN X153CrMoV12 hardened steel with tools based on polycrystalline cubic boron nitride The study presents the results of an analysis of the phenomenon of material side flow during finish turning of EN X153CrMoV12 (H12MF GOST 5950-2000) tool steel hardened to 63±2 HRC with cutting tools made of polycrystalline composites based on polycrystalline cubic boron nitride. For an uncoated wedges of CBN 7025 the material side flow occurred for the entire range of tested cutting feed. For a CBN 8120 wedges with a TiA1N coating the side flow was observed exclusively for the cutting feed of f = 0.2 mm/rev. The researched phenomenon did not occur on the surfaces finished with a CBN 7015 tool coated with TiN.

show abstract

Brazing of cutting materials

Cited by 6 publications

References 41 publications

Vacuum Brazing of 18MAR300 Nickel Maraging Steel Joints Based on Additively Manufactured and Conventional Material Grades

Vacuum Brazing of 18MAR300 Nickel Maraging Steel Joints Based on Additively Manufactured and Conventional Material Grades

An Improved Procedure for the Quality Control of Sintered Carbide Tips for Mining Applications, Based on Quantitative Image Analysis of the Microstructure

The Phonomenon of Material Side Flow During Finish Turning of EN X153CrMoV12 Hardened Steel with Tools Based on Polycrystalline Cubic Boron Nitride

Contact Info

Product

Resources

About