钛金属固体法渗硼新技术  

New Technique of Pack Boronizing of Titanium

作　　者：贾宝平[1] 贺跃辉[1] 汤义武 刘业翔[3] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]长沙力元新材料股份有限公司,湖南长沙410100 [3]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2005年第2期179-182,共4页Journal of Central South University:Science and Technology

基　　金：国家重点基础研究发展规划项目(G1999064903)

摘　　要：对传统固体粉末法渗硼工艺进行改进,用B4C和无水Na2B4O7 代替非晶态硼作为供硼剂,制备出以TiB2 为主要成分的表面渗层,并研究了原料成分和反应条件对渗层相结构及厚度的影响。研究结果表明:渗硼剂配料中Na2B4O7 和B4C的质量分数比对渗层有很大影响,当w(Na2B4O7)∶w(B4C)=2∶6时,渗层厚度和表面清洁程度等综合性能最优;填充剂Al2O3 能导致TiB2 渗层脱落,且脱落程度随Al2O3 含量的增加而加重;渗层厚度随处理时间的平方根呈线性增加;渗硼层厚度与试验温度的关系为d=aT2+bT+c。Using B4C and anhydrous Na2B4O7 instead of amorphous boron as the boron offer, the boride layer of TiB2 was prepared in the pack boronizing method. Effects of powder component and experiment condition on the phase structure and thickness of boride layer were discussed. The results show that the mass ratio of Na2B4O7 to B4C has an obvious effect on the performance of layer. When w(Na2B4O7):w(B4C) = 2:6, the integrative performance of boride layer is the best as for as the thickness and cleanliness are concerned. The A12O3 padding makes the layer desquamate from the matrix. With the heat-treatment time extending, the thickness of layer has linear relation with the square root of time. And the relationship between the thickness and the temperature can be given by d = aT2 + bT + c.

关 键 词：钛 硼化钛 渗硼 固体粉末法 

分 类 号：TG156.87[金属学及工艺—热处理] TG166.5[金属学及工艺—金属学]