نتایج جستجو برای: hp nb cast heat resistant steel

تعداد نتایج: 512848  

Journal: :MATEC web of conferences 2022

Ferritic stainless steels (FSS) develop poor surface finish during processing and this is attributed to the large columnar grains formed solidification. Addition of alloying elements such as Al, Ti Nb used in dual stabilized FSS improve solidification structures. In work, two 441 FSS, with 0.023 0.068 %Al respectively were investigated as-cast condition. The equiaxed zone ratio was determined b...

2008
Michael P. Brady Yukinori Yamamoto Michael L. Santella

This paper presents the results of the continued development of creep-resistant, alumina-forming austenitic (AFA) stainless steel alloys, which exhibit a unique combination of excellent oxidation resistance via protective alumina (Al2O3) scale formation and high-temperature creep strength through the formation of stable nano-scale MC carbides and intermetallic precipitates. Efforts in fiscal ye...

Journal: :Scientific American 1877

Journal: :Metals 2022

The long exposure of structural components to high temperatures (above 600 °C) negatively changes their mechanical properties, severely compromising the capacity buildings and other structures in which safety is a primary concern. Developing new cheaper fire-resistant steels with better thermal performances represents challenging, cutting-edge materials science engineering research topic. Alloy...

Journal: : 2021

The analysis of results practical application cast replaceable details hinged tillage agricultural machinery at operation in a number the enterprises Poltava region processing more than 60 thousand hectares within several years is presented. Comparative data resource parts made high-strength bainitic iron and steel serial analogues domestic foreign production are given. advantages method manufa...

Journal: :international journal of iron & steel society of iran 2012
m. abbasi a. kermanpur a. najafizadeh y. mazaheri

the formation of nano/ultrafine grained ferrite in low carbon steels containing different amounts of niobiumwas investigated using thermomechanical treatment which consisted of annealing of 85% cold rolled martensite with different parameters. the specimens were characterized by optical and scanning electron microscopy and vickers hardness test. a lamellar dislocation cell structure was formed ...

2014

The study discusses the microstructure and mechanical properties of eight tested 0.3 % C -30 % Ni 18 % Cr cast steels stabilized with niobium and titanium after annealing in the cycle of 900 °C / 300 h. The niobium content in the cast steels varied from 0.0 to 2.0 % and that of titanium from 0.0 to 1.2 % by weight. Microstructure was examined using both light microscope and a scanning electron ...

Industrial and experimental induction furnaces are used for melting various types of iron ingots, returned scraps and DRI sponge pellets to produce high purity cast - iron and steel heats. The lowest consumption of electrical energy determined for continuous feeding operation is 0.3 KWH/Kg for the production of cast - iron in a 1.5 - ton industrial furnace and 0.45 KWH/Kg for the production of ...

2014
Jian Bian Wang Li Hardy Mohrbacher Lu Hongzhou

Press hardening steel has become a much used material in car body manufacturing due to its excellent safety and lightweight potential. In some recent car models press hardening steel has reached already a weight share of more than 20% in the body structure while it is estimated that it could reach even around 40% in the future. However conventional press hardening steel based on the alloying co...

2007
Dave Grosvenor

photo-album, cast, person recognition, person identification, emphasis, emphasis statistics This technical report was originally externally published as a defensive publication from an invention disclosure. However it was decided to make the paper easily available to the HP technical community. A demonstration of the work has been produced and the work progressed. ( see http://w3.hpl.hp.com/peo...

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