我心飞翔eric 发表于 2013-4-25 15:49:04

块状铁素体对应的专业英语词汇是?

just as show in the title,please help me.

我心飞翔eric 发表于 2013-4-25 15:49:33

also 条状铁素体

我爱大自然 发表于 2013-4-25 16:58:52

bulk ferrite,我猜的

wy913625 发表于 2013-4-26 12:12:31

massive ferrite or polygonal ferrite.

四石 发表于 2013-4-26 21:50:48

massive ferrite   massive ferrite

笑盈盈 发表于 2013-4-27 13:06:45

blocky ferrite (刚好昨天收到老外的邮件里提到块状铁素体)

我心飞翔eric 发表于 2013-4-27 14:32:33

笑盈盈 发表于 2013-4-27 13:06 static/image/common/back.gif
blocky ferrite (刚好昨天收到老外的邮件里提到块状铁素体)

条状呢

温庆远 发表于 2013-4-28 09:03:17

块状铁素体[多边形铁素体]   :granular ferrile
                            polygonal ferrile
摘自GB7232---57标准

我心飞翔eric 发表于 2013-5-2 12:49:13

温庆远 发表于 2013-4-28 09:03 static/image/common/back.gif
块状铁素体[多边形铁素体]   :granular ferrile
                            polygonal ferrile
摘自GB7 ...

Thanks for helping ,Mr Wen.

温庆远 发表于 2013-5-3 12:37:54

举手之劳,不必客气。

冷艳锯 发表于 2013-5-7 09:36:56

Pearlite is often said to be a two-phased, lamellar (or layered) structure composed of alternating layers of alpha-ferrite and cementite that occurs in some steels and cast irons.



Pearlite was first identified by Henry Clifton Sorby and initially named sorbite, however the similarity of microstructure to nacre and especially the optical effect caused by the scale of the structure made the alternative name more popular.





冷艳锯 发表于 2013-5-7 09:40:43

The strength of pearlite is determined by the scale of ferrite and cementile.



冷艳锯 发表于 2013-5-7 09:42:38

Sorry,I was onfused.

Ferrite, also known as α-ferrite (α-Fe) or alpha iron, is a materials science term for pure iron, with a body-centered cubic crystal structure. It is this crystalline structure which gives steel and cast iron their magnetic properties, and is the classic example of a ferromagnetic material.

It has a strength of 280 N/mm2 and a hardness of approximately 80 Brinell.

Mild steel (carbon steel with up to about 0.2 wt% C) consist mostly of ferrite, with increasing amounts of pearlite (a fine lamellar structure of ferrite and cementite) as the carbon content is increased. Since bainite (shown as ledeburite on the diagram at the bottom of this page) and pearlite each have ferrite as a component, any iron-carbon alloy will contain some amount of ferrite if it is allowed to reach equilibrium at room temperature. The exact amount of ferrite will depend on the cooling processes the iron-carbon alloy undergoes as it cools from liquid state.

In pure iron, ferrite is stable below 910 °C (1,670 °F). Above this temperature the face-centred cubic form of iron, austenite (gamma-iron) is stable. Above 1,390 °C (2,530 °F), up to the melting point at 1,539 °C (2,802 °F), the body-centred cubic crystal structure is again the more stable form of delta-ferrite (δ-Fe). Ferrite above the critical temperature A2 (Curie temperature) of 771 °C (1,044 K; 1,420 °F), where it is paramagnetic rather than ferromagnetic, is beta ferrite or beta iron (β-Fe). The term beta iron is seldom used because it is crystallographically identical to, and its phase field contiguous with, α-Fe.

Only a very small amount of carbon can be dissolved in ferrite; the maximum solubility is about 0.02 wt% at 723 °C (1,333 °F) and 0.005% carbon at 0 °C (32 °F). This is because carbon dissolves in iron interstitially, with the carbon atoms being about twice the diameter of the interstitial "holes", so that each carbon atom is surrounded by a strong local strain field. Hence the enthalpy of mixing is positive (unfavourable), but the contribution of entropy to the free energy of solution stabilises the structure for low carbon content. 723 °C (1,333 °F) also is the minimum temperature at which iron-carbon austenite (0.8 wt% C) is stable; at this temperature there is a eutectoid reaction between ferrite, austenite and cementite.

eagleskying 发表于 2016-2-2 14:06:16

Blocky ferrite:lol:victory:
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