|
|
1、Describe the following iron based alloys in terms of the range of compositions (particularly
carbon) and typical mechanical properties.
a. Plain carbon steel e. Gray cast iron
b. Low, medium and high carbon steel f. Stainless steels: ferritic, austenitic,
martensitic
c. Cast iron g. Hypo-eutectoid steel
d. White cast iron h. Hyper-eutectoid steel
2、Describe, in general terms, the composition, structure, mechanical properties and formation
of the following phases found in steels:
a. Ferrite d. Martensite
b. Pearlite e. Austenite
c. Cementite f. Graphite
3、Describe, in general terms, the following standard types of heat treatments in terms of the
processing, microstructure produced, and mechanical properties for steel:
a. Normalize e. Martemper
b. Temper f. Austemper
c. Quench g. Stress relieve
d. Austenitize h. Anneal
4、Why do alloys possessing high hardenability often have poor weldability (usually due to
weld cracking)?
5、What role does carbon play in the formation of martensite? Can pure iron be austenitized
then quenched to form martensite?
6、How does austenite grain size effect hardenability?
7、What is the A3 temperature and why is it different for the different alloys being investigated? |
|
|Archiver|手机版|小黑屋|热处理论坛
( 苏ICP备2021037530号|苏公网安备32059002001695号 )
IP卡
发表于 2011-5-5 17:13:59
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
求高手:)
发表于 2011-5-8 19:32:34