摘要
处理温度高于900℃的0Cr25Al5合金其强度和塑性急剧降低,晶粒迅速长大。大晶粒使晶粒协调变形能力减低,这是高温脆化的一个原因。高于900℃的处理还能诱发475℃脆化快速发展,使晶粒本身失去变形能力,475℃脆性在高温处理后的炉冷过程中发展充分,在水冷或空冷过程中部分产生,从而对高温脆化也有主要贡献。在800℃进行处理则无类似作用。利用700～900℃的二次处理能部分消除高于900℃一次处理所产生的脆性。
When treatment temperature is over 900℃, with growing of grains, a strong embrittlement occurs for 0Cr25A15 alloy and brittleness increases. The treatment over 900℃ may cause a rapid 475℃ brittleness which makes the formation ability of grains failed. The 475℃ brittleness develops fully during f. c. and imperfectly during a. c. or w. c. and brings important contribution to its high temperature embrittlement (HTE). The treatment at 800℃ has no effect like this. By a secondary treatment at 700～900℃, HTE can be eliminated to some extent through removing the effects of 475℃ brittleness.
出处
《钢铁》
CAS
CSCD
北大核心
1992年第10期47-50,55,共5页
Iron and Steel
