发明名称 |
Method for processing preforms of hyper-eutectoid gamma + alpha<sub>2</sub> alloys |
摘要 |
The present invention pertains to the field of metal and alloy processing and can be used for producing preforms and articles having a regulated structure as well as a microstructure with a homogenous fine granulation of up to 0.1 mu m. The preforms of hyper-eutectoid gamma + alpha 2 alloys are first heated and submitted to deformation. The preform deformation is carried out in a temperature range of 700 DEG C to Te DEG C, in which Te is the eutectoid conversion temperature, at rates of 10<-4> to 10 sec.<-1> in i steps and with n transitions per step, and according to a global deformation ratio SIGMA epsilon ensuring the grinding and size reduction of the grains by recrystallisation. The temperature Ti and the deformation rate epsilon i of a preform in each step are determined according to the experimental results of uniaxial compression on Ni models under isothermal conditions. The size of the grains/colonies is equal to di provided that d1 = dpref. The number of steps is determined from the successive reduction of the grain size in the starting preform until a target value is reached. |
申请公布号 |
AU5581100(A) |
申请公布日期 |
2001.01.31 |
申请号 |
AU20000055811 |
申请日期 |
2000.06.19 |
申请人 |
INSTITUT PROBLEM SVEKHPLASTICHNOSTI METALLOV RAN |
发明人 |
RENAT MAZITOVICH IMAEV;OSKAR AKRAMOVICH KAIBYSHEV;GENNADY ALEXEEVICH SALISCHEV |
分类号 |
C22F1/18 |
主分类号 |
C22F1/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|