What is precipitation hardening stainless steel?
Jawaysteel co.ltd is a major professional stainless steel company combined production and sales. We are committed to research various new stainless steel. Recently we have introduced a new products-precipitation hardening stainless steel.
Precipitation hardening stainless steels are iron - chromium - nickel alloy, in order to develop high strength and high toughness, by adding AL, Ti, Nb, V, N, in the aging heat treatment process to form a precipitate phase. Precipitation hardening stainless steel’s basic organization can be defined as matrix structure or austenite, it is depending on the composition and processing. Age-hardening martensitic stainless steels combined good corrosion resistance and thermal characteristics. The most widely age-hardening martensitic stainless steel is 17-4PH (0Cr17Ni4Cu4Nb). Age-hardening martensitic stainless steel is sensitive to stress corrosion cracking of Chloride. The sensitivity depends on the steel grade and aging temperature to a certain extent.
According to the morphology can be divided into three categories: semi-austenitic precipitation hardening, precipitation hardening austenitic stainless steels and precipitation hardening martensitic. Including 0Cr17Ni7A and 0Cr15Ni7M02Al in China's national standard steel grade, this is a part of a precipitation hardening semi-austenitic stainless steel. Organizational characteristics of the steel is an austenite plus a volume fraction of 5% to 20% of ferrite during solution or annealed condition. This steel into martensite after a series of heat treatment or mechanical treatment, and then by aging precipitation hardening to achieve high strength required. This steel covered good formability and good weldability, as a high strength materials can be used in the nuclear industry, aviation and aerospace industries.
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