Topic
Maraging steel
About: Maraging steel is a research topic. Over the lifetime, 1728 publications have been published within this topic receiving 19886 citations. The topic is also known as: martensitic ageing steel.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, two complementary techniques, namely three-dimensional atom probe and small-angle neutron scattering, were employed to study precipitation phenomena in a stainless maraging steel (Fe-12.3%,Cr-8.9%,Ni-0.6%), during ageing at 475°C.
Abstract: Two complementary techniques, namely three-dimensional atom probe and small-angle neutron scattering, were employed to study precipitation phenomena in a stainless maraging steel (Fe-12.3%Cr-8.9%Ni-0.6%Si-1%Mo-0.6%Al-0.8%Ti, wt.%) during ageing at 475°C. Atom probe investigations revealed the precipitation of a single Ni-rich phase exhibiting an average particle diameter of 2.5 nm after 12 h. After ageing for 100 h these precipitates had grown to an average size of 4 nm. In addition, needle-or plate-like Ni-rich precipitates larger than 15 nm were present. Their compositions differ mainly in the amount of Fe, Ni and Ti. Furthermore, Cr-rich precipitates were observed. The size ranges and the number densities of the precipitates match well with those observed by small-angle neutron scattering.
6 citations
Patent•
26 Sep 2001
TL;DR: In this article, a steel belt obtained by welding a hoop into a ring shape and thereafter performing heat treatment has a composition in which each content of C, Si, Mn, Cr, Mo and V is prescribed and moreover the relation in the following inequality is satisfied, has a metallic structure essentially consisting of tempered martensite, has high strength and is free from welding defects.
Abstract: PROBLEM TO BE SOLVED: To provide a steel belt having an inexpensive steel composition free from a large quantity of alloy elements unlike maraging steel, exhibiting high strength and moreover free from welding defects and to provide its producing method. SOLUTION: This steel belt obtained by welding a hoop into a ring shape and thereafter performing heat treatment has a composition in which each content of C, Si, Mn, Cr, Mo and V is prescribed and moreover the relation in the following inequality (1) is satisfied, has a metallic structure essentially consisting of tempered martensite, has high strength and is free from welding defects, and the method for producing the steel belt is also presented: 215[Si]+110[Cr]+-115[Mo]+114[V]>=400...(1) (wherein, [ ] denotes the content (mass%) of each element).
6 citations
6 citations
01 Jan 1990
TL;DR: In this article, the effect of laser-induced high intensity stress waves on the hardness, residual stresses, and fatigue resistance at the heat affected zone of welded 18 Ni (250) maraging steel was investigated.
Abstract: The effect of laser-induced high intensity stress waves on the hardness, residual stresses, and fatigue resistance at the heat affected zone of welded 18 Ni (250) maraging steel was investigated. Laser shock processing increased the hardness, induced compressive residual stresses, and increased fatigue strength of weldments.
6 citations
TL;DR: In this paper, the effect of heat treatments on the corrosion and stress corrosion resistance of the alloy was evaluated in 3.5% NaCl solution, and the results indicated that M300 steel processed by SLM is highly susceptible to stress corrosion cracking (SCC).
Abstract: M300 maraging steel was fabricated by selective laser melting (SLM), and the effect of heat treatments on the corrosion and stress corrosion resistance of the alloy was evaluated in 3.5% NaCl solution. The microstructure of the alloy in the solution-treated and aged condition is typical of lath martensitic structure along with metallurgical defects typical of SLM-processed material. The results indicated that M300 steel processed by SLM is highly susceptible to stress corrosion cracking (SCC). The fracture morphology of the samples exhibited brittle intergranular cracking along with ductile cracking features in NaCl. HIP treatment after SLM and before solution treatment and aging improved the SCC resistance of the alloy in terms of marginal increase in elongation in NaCl solution. However, this treatment could not completely eliminate the SCC susceptibility of the maraging steel in NaCl solution. The SCC susceptibility of M300 maraging steel processed by SLM can be attributed to the presence of defects such as pores which assisted the early initiation of cracks and the resultant intergranular (IGC) failure. The defects were considerably healed by subjecting the SLM-processed alloy to HIP treatment, thus improving the SCC resistance. In addition to the reduction in pore density, the increased austenite content present in the alloy after heat treatment played significant role toward improving the corrosion resistance of the as-printed M300 steel.
6 citations