Effects of Nitrogen in Steel and Insert-metals on Diffusion Bonding Characteristics of Titanium to Steel Joint

钢和嵌件中的氮对钛与钢接头扩散连接特性的影响

• 批准号: 01550558
• 负责人: MOMONO Tadashi
• 金额: $ 1.66万
• 依托单位: Muroran Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550558/
• 关键词: Diffusion Bonding; Bond strength; Clad steel; Titanium alloy; Nitriding; Insert-metal; Bond interface; Cromium steel; 表面処理

The purpose of the present investigation is to make clear the between the bonding characteristics and the formation of interlayer in the diffusion bonding of titanium to steel. We have thoroughly the problem of 1) effect of nitrogen in base metal steel, that is the diffusion bonding with the format ion of TiN layer, and 2) effect of insert-metals, such as Ti-6Al-4V alloy, Fe-Si alloy and Fe-Cr alloy. The results are as follows :1. Since Kirkendall voids are formed at the Ti side in the diffusion bonded Ti/steel joint, the bond strength of the joint is lowered.2. Tin layer is formed at the bond interface in diffusion bonded Ti/soft-nitriding steel and Ti/ion-nitriding steel joints. Improvement of the bond strength, however, cannot be accomplished in this case. Since the TiN layer suppresses the diffusion of Fe or Ti into the other base metals as well as TiC, the TiN layer has the effect of preventing the formation of the brittle beta-Ti and Ti-Fe intermetallic compounds.3. TiC layer is formed at the bond interface in diffusion bonded Ti-6Al-4V alloy/S20C joint bonded at 850^ﾟC, but TiC and TiFe_2 layers are formed at 1000^ﾟC. The tensile strength of joints increased with bonding temperature below 900^ﾟC, but above 900^ﾟC decreased with rise in bonding temperature. This fact suggests that the TiFe_2 layer coexisting with the TiC layer had more harmful effect on the joint strength than those formed individually.4. Higher bond strength of 27 kgf/mm^2 was obtained in Ti/Fe-2%Si alloy joint bonded at 1000^ﾟC for 30min under 0.8kgf/mm^2. This accounts for the pronounced effects of the formation of the TiC layer and the prevention of the Kirkendall voids.5. The maximum bond strength of 34 kgf/mm^2 was obtained in Ti/Fe-30Cr alloy joint bonded at 1000^ﾟC for 30min under 0.8kgf/mm^2. The reason why higher bond strength has obtained may be due to the effect of the decrease of unbonded area at 850^ﾟC and the depression of the growth of the interlayers at 1000^ﾟC.

本研究的目的是在钛与钢的扩散键合中清除键合特性与层中层的形成之间。我们彻底遇到了1）碱金属钢对氮的影响，即与锡层格式的扩散键，以及2）插入金属的效果，例如Ti-6Al-4V合金，Fe-Si合金和Fe-Cr-gry。结果如下：1。由于kirkendall空隙是在扩散键键/钢接头的Ti侧形成的，因此降低了关节的键强度。2。在扩散键Ti/软硝化钢和Ti/Ion-nitriding钢接头中，在键界面形成锡层。但是，在这种情况下，无法实现债券强度的提高。由于TIN层抑制了Fe或Ti的扩散到其他碱金属以及TIC中，因此TIN层具有防止脆性β-TI和TI-FE金属间质合化合物的形成的作用。3。在扩散键的TI-6AL-4V合金/s20c接头在850^c的键键键成键界面，但在1000^ﾟC处形成TIC和TIFE_2层。接头的拉伸强度随粘结温度低于900^c的粘结而增加，但是随着粘结温度的升高，900^c的拉伸强度降低了。这一事实表明，与单独形成的tiC层共存的Tife_2层对关节强度的效果更大。4。在0.8kgf/mm^2以下30分钟的Ti/Fe-2％Si合金接头中获得了27 kgf/mm^2的较高键强度。这说明了TIC层形成的明显影响以及Kirkendall voids.5。在0.8kgf/mm^2以下30分钟的Ti/Fe-30cr合金接头中获得了34 kgf/mm^2的最大键强度。获得较高键强度的原因可能是由于850^c时未粘结面积减少的影响以及1000^ﾟC的层增长的抑郁症。

项目成果

T.Momono: "Effects of Carbon Content on the Diffusion Bonding of Iron and Steel to Titanium" ISIJ International. 30. 978-984 (1990)

T.Momono：“碳含量对钢铁与钛的扩散连接的影响”ISIJ International。

桃野 正: "鋼とTiー6Alー4V合金の拡散接合" 鉄と鋼.

Tadashi Momono：“钢和 Ti-6Al-4V 合金的扩散接合”Tetsu 对 Hagane。

馬場寛,桃野正,平井伸治,片山博: "Ti-6Al-4V合金と鋼の拡散接合" 日本金属学会,日本鉄鋼協会両北海道支部合同春季講演大会. (1989)

Hiroshi Baba、Tadashi Momono、Shinji Hirai、Hiroshi Katayama：“Ti-6Al-4V合金与钢的扩散接合”日本金属学会和日本钢铁学会北海道分会春季联合会议（1989年）。

Tadashi Momono: "Effects of Carbon Content on the Diffusion Bonding of Iron and Steel to Titanium" ISIJ International. Vol. 30. 978-984 (1990)

Tadashi Momono：“碳含量对钢铁与钛扩散连接的影响”ISIJ International。

桃野正,馬場寛,平井伸治,片山博: "鋼とTi-6Al-4V合金の拡散接合" 材料とプロセス(日本鉄鋼協会講演論文集). 2. 1337 (1989)

Tadashi Momono、Hiroshi Baba、Shinji Hirai、Hiroshi Katayama：“钢和 Ti-6Al-4V 合金的扩散接合”材料和工艺（日本钢铁研究所会议录）2. 1337 (1989)。