Analysis of hardenability effect of boron

Lin, Hong-Rang; Cheng, Gwa-Hwa

doi:10.1179/026708390790193763

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…The influence of titanium in enabling boron to exhibit its positive effect on steel hardenability has been observed so often, that it has become customary to alloy steels with titanium whenever a hardenability increase by boron is desired. The effect of boron on the hardenability of low‐alloy steels depends, in addition to the amount of boron, also on the Ti, Al, and N contents . Nakasato and Takahashi suggested titanium additions of minimum 0.02 wt% to bind free nitrogen by TiN formation and enable boron to remain in solution.…”

Section: Influence Of Boron On Hardenabilitymentioning

confidence: 99%

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Boron in Heat‐Treatable Steels: A Review

Sharma

Ortlepp

Bleck

2019

steel research int.

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The science and technology of boron addition to heat‐treatable steels are explained. The aim is to address the following: How to add boron to steel (i.e., the manufacturing aspects of boron addition to steel)? What precautions are necessary when alloying boron to steel, in terms of composition (mainly nitrogen, aluminum, and titanium contents), processing and heat treatment (i.e., material and process robustness and reproducibility for a consistent steel quality)? Where does boron go in steel (i.e., the state of boron, interstitial or substitutional solute, precipitate or a complex with other alloying elements; as well as the location of boron, i.e., dissolved as a solute in the grain or segregated at the grain boundary)? Which characterization methods are suitable for the detection of the very small amounts of boron (<30 wt ppm) in heat‐treatable steels? What does boron do in steel (i.e., its effect on hardenability and mechanical properties, specifically impact toughness)? How does it do and what it does (i.e., the physical mechanism by which it influences the properties)? How much boron is really required to achieve the desired properties in heat‐treatable steels (i.e., recommendations for the optimum boron content)?

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Section: Influence Of Boron On Hardenabilitymentioning

confidence: 99%

“…Effect of alloying elements on the boron hardenability factor based on data from literature for carbon, boron, and titanium . The effect of Ti also includes the effects of Al and N and has been shown in the form of bands for steel types, A and B.…”

Section: Influence Of Boron On Hardenabilitymentioning

confidence: 99%

Boron in Heat‐Treatable Steels: A Review

Sharma

Ortlepp

Bleck

2019

steel research int.

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“…The first step in boron precipitation can occur during the cooling after casting. This step is well controlled in the industry and the precipitation of boron nitride or boron oxide can be avoided by addition of elements such as titanium or aluminium, which trap the nitrogen atoms and the oxygen atoms 4. The control of the boron precipitation starts to be critical during the hot‐rolling process.…”

Section: Resultsmentioning

confidence: 99%

Nano‐SIMS investigation of boron distribution in steels

Valle¹,

Drillet

Pic

et al. 2011

Surface & Interface Analysis

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aThe introduction of boron in amounts of tens parts per million (ppm) increases the hardenability of steels. Nevertheless, this positive effect of boron can drastically be reduced during the industrial process if boron precipitation occurs. In order to identify the different steps of boron precipitation for the main parts of the process (deformation at high temperature, cooling and welding), the distribution of boron in high strength steels is studied through SIMS nano-analysis. It is shown that the B state and the nature of the B precipitates can be directly deduced from different ion maps ( 11 B, 12 C, 11 B 12 C, 11 B 14 N, 11 B 16 O) acquired simultaneously. Depending on the progress of the process, borocarbides and boron nitrides precipitates are observed.

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Analysis of hardenability effect of boron

Cited by 2 publications

References 2 publications

Boron in Heat‐Treatable Steels: A Review

Boron in Heat‐Treatable Steels: A Review

Nano‐SIMS investigation of boron distribution in steels

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