Ni基耐热合金与耐热钢扩散连接行为的研究

通过Ｋ５耐热合金与２Ｃｒ１２ＮｉＷＭｏＶ耐热钢的扩散连接，研究了接头的扩散行为。结果表明，以Ｎｉ作中间层连接耐热钢与耐热合金，可以形成以γ固溶体为主的接头，接头区域无新的脆性相生成，接头强度可达母材的９０％以上；适当提高扩散连接的温度与压力，可提高接头性能，但温度过高和保温时间过长，则在耐热合金中易生成扩散孔洞。

DIFFUSION BEHAVIOR OF DIFFUSION BONDING JOINT BETWEEN Ni-BASED HEAT-RESISTING ALLOY(K5) AND HEAT-RESISTING STEEL

The diffusion behavior of the diffusion bonding joint between K5 heat-esisting alloy and 2Cr12NiWMoV heat-resisting steel was studied.The results show that if a Ni interlayer exsits between 2Cr12NiWMoV and K5 alloy, the joint mainly consists of γ solution, where no new brittle phase is formed, and in this case the joint strength is higher than 90% of the matrix strength. The joint properties increase with increasing diffusion temperature and pressure. but too much higher temperature and time will result in the diffusion V ids in the K5 alloy.