权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Estimation system of weldability for materials joining based on knowledge data base of fusion processing technologies

基于熔合加工技术知识库的材料连接可焊性评价系统

基本信息

批准号：
62460199
负责人：
ARAKI Takao
金额：
$ 4.48万
依托单位：
Ehime University (1989)Osaka University (1987-1988)
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1989
项目状态：
已结题

项目摘要

The purpose of the study is to develop a estimation system of weldability for structural materials joining based on a knowledge data base of fusion processing technologies and to prepare the supporting data of the knowledge data base for weldability of structural materials having a new functional properties.The estimation system was constructed of the various frame such as kind of steel plates, type of joints, welding procedures, welding materials, strength of weld and contents of hydrogen for the prevention of weld cold cracking, and also, such as kind of steel plates, type of joints, welding procedures and Charpy and CTOD values for estimation of toughness of weld. The system were put into numerous data which the weld cracking test, Charpy and CTOD tests were curried out. The system can be controlled the suitable preheating and post-heating temperature, and estimated the toughness of weld.The works were curried out some experiments to investigated the joining properties for SiC/Ti system fiber reinforced metal matrix composite, Ti-Ni shape memory alloy and surface modification of structural steel. SiC/Ti FRM was produced by vacuum hot pressing and analyzed the effect of reaction of fiber-matrix on strength. Mechanical properties and fracture of Ti-Ni shape memory alloy and its laser weld joint have been investigated. Butt welding was performed using lOkW laser. The laser welded specimens showed a successful shape memory effect and super elasticity. These properties were identical with those of the base metal.The composite materials such as carbide dispersed composite materials and NiCrAlY composite material were produced on some structural steel substrate using various metal powders and carbide powders by fusion processing technologies such as plasma transfer arc method, plasma spraying and laser cladding process. As the structural steel using as substrate was overlaid the layer of composite alloy by above method, it's surface has new functional property.

本研究的目的是开发一个基于熔融加工工艺知识库的结构材料焊接性评价系统，为具有新功能特性的结构材料焊接性知识库准备支持数据，该评价系统由钢板种类、接头类型、焊接工艺、焊接材料、焊缝强度、氢含量等因素对防止焊缝冷裂纹的影响，以及钢板种类、接头类型、焊接工艺、Charpy值和CTOD值对焊缝韧性的影响。该系统输入大量的数据，进行了焊接裂纹试验、夏比冲击试验和CTOD试验。该系统可控制合适的预热和后热温度，并可对焊缝的韧性进行评价。本文对SiC/Ti系纤维增强金属基复合材料、Ti-Ni形状记忆合金和结构钢表面改性的连接性能进行了试验研究。采用真空热压法制备了SiC/Ti复合材料，分析了纤维-基体反应对强度的影响。研究了Ti-Ni形状记忆合金及其激光焊接接头的力学性能和断裂行为。使用10 kW激光进行对接焊接。激光焊接试样显示出成功的形状记忆效应和超弹性。采用等离子转移电弧法、等离子喷涂和激光熔覆等熔覆技术，在结构钢基体上，以不同的金属粉末和碳化物粉末为原料，制备了碳化物弥散复合材料和NiCrAlY复合材料。用该方法在结构钢基体上堆焊复合合金层，使其表面具有新的功能特性。