Microstructure of a Creep-Resistant 10 Pct Chromium Steel Containing
The microstructure of a trial martensitic chromium steel containing a high content of boron (250 ppm) was characterized in detail in the as-tempered and aged conditions. This steel has a similar composition and heat treatment as the TAF steel that still is unsurpassed in creep strength among all 9 to 12 pct chromium steels. …
High-temperature oxidation of sintered austenitic stainless steel
The present study examines the cyclic oxidation behaviour at 900 °C in air of sintered 316L austenitic stainless steels containing 1 wt.% yttria or 0.6 wt.% boron.The microstructures of the sintered and oxidized samples were characterised by field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS) …
Adverse effect of niobium and boron on hot deformation
The experimental materials were rolled bars produced by a steel plant. The manufacturing process of the experimental steel is shown in Fig. 1.There were three kinds of 20MnCr5 steels (EN10084 or DIN 17210 standard) with different contents of Nb and B, as shown in Table 1.The sulfur content was set as 0.023–0.025 wt.% in order to obtain good …
Boron-Treated Steel: Why Does Boron Affect Steel …
Born-treated steel, often simply called "boron steel" contains a small amount of ferrous boron that is added to the molten steel during the production …
Boron Steel
Fig. 10.29 compares the creep rupture data between the base metals and welded joints for 9Cr-boron steel containing different boron and nitrogen concentrations and …
Effect of Direct Microalloying of Boron-Containing
The possibility of reducing boron from oxide boron-containing systems and its transition to steel are considered in some works [4, 6]. The aim of this work is to study the effect of direct microalloying with boron on the structure and mechanical properties of 08KP, 3SP, 3PS, and 09G2S brands.
Austenite decomposition of C–Mn steel containing boron …
1.. IntroductionLow-alloyed steel containing small additions of boron (0.001–0.003 wt.%) [1], [2] has stimulated interest for several decades, due to the excellent combination of hardness and ductility and improved mechanical resistance when submitted to heat treatment.. Boron added to steel results in the formation of the precipitate Fe 23 …
Boron in Steel: Part Two :: Total Materia Article
Boron added to high-speed-cut steels, for example, containing 18% W, 4% Cr and 1% V, enhances their cutting performance, but reduces their forging qualities. Addition of boron …
GB2261879A
GB2261879A GB9127271A GB9127271A GB2261879A GB 2261879 A GB2261879 A GB 2261879A GB 9127271 A GB9127271 A GB 9127271A GB 9127271 A GB9127271 A GB 9127271A GB 2261879 A GB2261879 A GB 2261879A Authority GB United Kingdom Prior art keywords steel weight steels boron present Prior art date Legal status …
Solidification and Boride Characteristics of Boron-Containing
Microstructural evolution in AISI 304 stainless steel and in a similar steel containing 1% boron during hot torsion was studied by means of quantitative optical microscopy and transmission ...
Study of Microstructure and Mechanical Properties of Boron-Containing
Stiffened specifications for quality of reinforcement product are dictated by the contemporary market that is expressed in the introduction of new TU and GOST for manufactured products. When switching to the new GOST 34028–2016 enterprises are forced to abandon the use of traditional steel grades and switch to sparingly alloyed …
Boron Containing Low Carbon Deep Drawing Continuous Annealed Steel
Aluminium killed low carbon steel heats were made industrially through Basic Oxygen Furnace (BOF)- Ladle Furnace (LF) followed by casting in continuous slab caster and hot rolling in Hot Strip Mill (HSM).The alloy chemistry (wt%) of the steel is shown in Table 1.Boron was added with increasing amounts in different heats to gradually …
Metals | Free Full-Text | The Hot Ductility, Microstructures
Due to its refinement, the boron-containing steel had better ductility throughout the temperature range examined (700–900 °C), i.e., the hot ductility trough. Thus, the minimum percentage of reduction in area (%RA) value occurring at 800 °C was 43% for the boron-free steel, compared with 58% for the boron-containing steel. ...
Solidification microstructure of high borated stainless
Furthermore, the TiB 2 contained more boron content compared with (Cr,Fe) 2 B in per mole, thus leading to a decrease in the total amount of borides in Ti-containing steel. Moreover, despite directly separating out from the molten steel, the TiB 2 type borides were characterized by the granular or short rod-like structures (Figs. 9, 11 ...
Boron-Containing Steel Structure and Properties at …
Article 01 September 2014. Corrosion-resistant steels with a high boron content are structural materials used most often for manufacturing compact storage racks for …
Study on Equilibrium and Non-equilibrium Solidification of Boron …
The microstructure of the boron-containing steel is well homogenous distributed, dense, and higher ferrite volume fractions change with boron contents. The boron-containing steel is characterized by resistance to wear, about 117 and 230% of standard AISIM2 tool steel in equilibrium and non-equilibrium production conditions, …
Effect of niobium and titanium addition on the hot ductility of boron …
Hot ductility of boron containing steel (B steel) with adding Nb (0.03 wt.%) (B–Nb steel) and B–Nb steel with adding Ti (0.0079 wt.%) (B–Nb–Ti steel) was quantified using hot tensile tests.The specimens were solution-treated at 1350 °C and cooled at 20 °C s −1 to tensile test temperature (T) in the range of 750 ≤ T ≤ 1050 °C.
Boron-Containing Steel Structure and Properties at Room …
A Gleeble 3800 thermomechanical process physical simulator unit is used to study the structure and mechanical properties of corrosion-resistant steel with a high boron content intended for production of hexagonal pipes for exhausted nuclear fuel storage. Compression tests at room and elevated temperature show that with an increase in test temperature …
Precipitate composition regulation and corrosion
Precipitate composition regulation and corrosion resistance improvement of boron-containing S31254 steels through a pre-aging treatment. Author links open overlay panel Jiayue Liu ... Because of the small atomic size and the extremely low solubility of boron in the austenitic matrix of stainless steel [20], [21], boron tends to diffuse to the ...
Boron in Heat‐Treatable Steels: A Review
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 …
Effect of boron on the hot ductility of Nb-containing steel
The beneficial effect of boron on 20CrMnTi steel containing tin and copper might be ascribed to the fact that boron segregates to grain boundaries, accelerates onset of DRX, retards austenite ...
Boron in Steel: Part Two :: Total Materia Article
Boron added to high-speed-cut steels, for example, containing 18%W, 4%Cr and 1%V, enhances their cutting performance, but reduces their forging qualities. ... (1000°C). Boron steel must also be tempered at a lower temperature than other alloy element steels of the same hardenability. Applications. Boron steels are used for a variety of ...
Boron Steel Vs. Carbon Steel: What's the Difference
Boron steel is an alloy containing small amounts of boron (usually around 0.0005%) and other elements like carbon, manganese, nickel, molybdenum, chromium, and vanadium. This combination makes boron steel extremely hard and wear-resistant while maintaining good ductility and flexibility.
Boron Steel Plate
Ultra high-strength Boron steels are alloyed with a small amount of boron, usually less than 1%. Boron steels and Boron steel plate are used frequently in the automotive industry for a variety of applications, including strengthening the elements around car door frames, as dash cross-members or rollover bars, and in reclining seats.
(PDF) Effect of Tempering on Microstructure and
This study shows that in an atmosphere containing water vapor, the oxide layer on the surface of the 9CrNB steel MarBN (Martensitic 9Cr steel strengthened by Boron and MX Nitrides) was formed by ...
Mechanical properties and fracture mechanism of …
Abstract. Boron (B) is an effective element for facilitating liquid phase sintering (LPS) of powder metallurgy (PM) steels. However, the roles of B in the …
Study on a High-Boron-Content Stainless Steel Composite for Nuclear
In this research, a high-boron-content composite material with both neutron and γ rays shielding properties was developed by an optimized design and manufacture. It consists of 304 stainless steel as the matrix and spherical boron carbide (B4C) particles as the functional particles. The content of B4C is 24.68 wt%, and the particles' radius is 1.53 …
Effect of Boron Precipitation Behavior on the Hot Ductility of Boron …
The effect of boron (B) precipitation behavior on the hot ductility of B containing steel was investigated. Hot ductility of B containing steel was sensitive to the cooling rate (CR) in the range of 1 to 20 K/s (1 to 20 °C/s), whereas that of B-free steel showed little change with CR. Increased CR causes deepening and widening of the …
(PDF) Study on a High-Boron-Content Stainless Steel Composite for
In addition, the neutron and γ rays shielding performance of the samples and borated stainless steel containing 1.7 wt% boron was tested by using an 241Am–Be neutron source and 60Co and 137Cs ...
Effect of niobium and titanium addition on the hot ductility of boron
When steel is held under slag containing 4.3% B2O3, the boron is reduced, mainly by silicon, whose content in the steel is 15–22% lower after the experiment. More boron is present in the steel ...