Dulekso poslamaýan polat mikrost gurmak mikrourturiti gurluşy we austenit, her hasaby takmynan 50% -i, takmynan 50% -i barabar bolan materialany aňladýar. Hakyky ulanmak boýunça, tapgyrlaryň 40-60% arasynda bolmagy has ýerliklidir.
According to the characteristics of the two-phase structure, by properly controlling the chemical composition and heat treatment process, the excellent toughness and weldability of austenitic stainless steel are combined with the higher strength and chloride stress corrosion resistance of ferritic stainless steel, making duplex stainless "Gowy poslama garşylyklaryna garşy hormatlary, ýokary güýjümi we aňsat gaýtadan işleýän we önümçilik ugurýandygyny birleşdirýän polat görnüşi polat görnüşi. Their physical properties are between austenitic stainless steel and ferritic stainless steel, but closer to ferritic stainless steel and carbon steel. The resistance to chloride pitting and crevice corrosion of duplex stainless steel is related to the content of chromium, molybdenum and nitrogen. Its resistance to pitting and crevice corrosion can be similar to that of 316 stainless steel, or higher than that of stainless steel for seawater, such as 6%MO austenitic stainless steel. All duplex stainless steels are significantly more resistant to chloride stress corrosion cracking than 300 series austenitic stainless steels, and their strength is also much higher than austenitic stainless steels, while showing good plasticity and toughness.
Duplex poslamaýan polatdan, adatça, dört kategoriýa bölünip bilner:
Four: Super duplex stainless steel type, containing high molybdenum and nitrogen, standard grades are UNSS32750, some also contain tungsten and copper, PREN>40, can be used in harsh medium conditions, with good corrosion resistance and mechanical comprehensive properties, comparable to super Owenit poslamaýan polatdan. (Bellik: Prefity: Garşiriş ekrana deň bahany dakmak)
Duplex poslamaýan polatdan artykmaçlyklar
1. Austenitleriň poslamaýan polat bilen deňeşdirilende
2) esasanam hlorde bolan gurşawda stres poslamazlaryna uly garşylyk görkezdi. Hatda iň pes kemsitme şazadasy bilen poslamaýan polat, Overalitiki poslamaýan polatdan has ýokary posilmeýän polate has ýokary garşylyk bar. Stress poslamasy, adaty IT, adaty Awenit poslamaýan polat, çözmek kyn. 3) The corrosion resistance of the most common 2205 duplex stainless steel used in many media is better than that of ordinary 316L austenitic stainless steel, and super duplex stainless steel has extremely high corrosion resistance. In some media, such as acetic acid and formic acid, it can even replace high-alloy austenitic stainless steel and even corrosion-resistant alloys. 4) ýerli poslama garşylygynyň gowydygyna ýetýär. Compared with austenitic stainless steel with the same alloy content, its wear corrosion resistance and corrosion fatigue resistance are better than austenitic stainless steel. 5) The linear expansion coefficient is lower than that of austenitic stainless steel, close to that of carbon steel, suitable for connection with carbon steel, and has important engineering significance, such as the production of composite plates or linings.
2. Düwürtik poslamaýan polat bilen deňeşdirilende, deblex poslamaýan polatuň artykmaçlyklary, aşakdaky artykmaçlyklar aşakdakylar:
1) giňişleýin mehaniki häsiýetler, esasanam plastmassa poslamaýan polat, esasanam plastik berkliklerden has ýokary. Britaniýanyň poslamaýan polat ýaly gödeklige duýgur däl.
2) sünnetleýin şhorýaşdyrriýadan çykalga garşy joşgunly ýagdaýlardan başga, beýleki ýerli poslama garşylygynyň beýleki korroritsiz polatdan has gowy.
3) sowadyş işleri we sowuk emele gelmegi ferritsiz polatdan has gowy.
4) kebşirleýiş öndürijiligi Ferrit däl poslamaýan polatdan has gowudyr. Umuman, kebşirlemezden ozal, ýylylyk bejergisinden öňem ýürek bejergisi talap edilmeýär we ýylylyk bejergisi talap edilmeýär.
5) anketanyň diapazony, ferrit poslamaýan polatdan has giňdir.
Amaly
