新技术新工艺
新技術新工藝
신기술신공예
NEW TECHNOLOGY & NEW PROCESS
2014年
11期
111-113
,共3页
M7C3相%硬质相%耐磨性
M7C3相%硬質相%耐磨性
M7C3상%경질상%내마성
M7 C3 phase%hardening phase%abrasion resistance
堆焊合金中合金元素 Cr 和 V 与堆焊层中的 C 形成 Cr7C3及 VC 等硬质相,在此基础上加入B 元素,形成相应的 TiB2,可进一步增加其硬度和耐磨性；因此,在高 Cr 合金中加入 B4C 制成粉芯,用埋弧焊堆焊的方法得到合金,测量宏观硬度并且观察了显微组织。结果显示,随着 B4C 含量增加,试样中硬质相比例增加,提高了试样的硬度,一定程度上增加了耐磨性(B4C 含量1.5%~3.5%为宜)；但 B4C 含量过高(B4C 含量达到3.0%左右),晶界偏析加大,易导致堆焊层开裂。
堆銲閤金中閤金元素 Cr 和 V 與堆銲層中的 C 形成 Cr7C3及 VC 等硬質相,在此基礎上加入B 元素,形成相應的 TiB2,可進一步增加其硬度和耐磨性；因此,在高 Cr 閤金中加入 B4C 製成粉芯,用埋弧銲堆銲的方法得到閤金,測量宏觀硬度併且觀察瞭顯微組織。結果顯示,隨著 B4C 含量增加,試樣中硬質相比例增加,提高瞭試樣的硬度,一定程度上增加瞭耐磨性(B4C 含量1.5%~3.5%為宜)；但 B4C 含量過高(B4C 含量達到3.0%左右),晶界偏析加大,易導緻堆銲層開裂。
퇴한합금중합금원소 Cr 화 V 여퇴한층중적 C 형성 Cr7C3급 VC 등경질상,재차기출상가입B 원소,형성상응적 TiB2,가진일보증가기경도화내마성；인차,재고 Cr 합금중가입 B4C 제성분심,용매호한퇴한적방법득도합금,측량굉관경도병차관찰료현미조직。결과현시,수착 B4C 함량증가,시양중경질상비례증가,제고료시양적경도,일정정도상증가료내마성(B4C 함량1.5%~3.5%위의)；단 B4C 함량과고(B4C 함량체도3.0%좌우),정계편석가대,역도치퇴한층개렬。
Element Cr and V can formed Cr7C3 and VC hardening phase with C in the surfacing layer,on the basis of that,especially formed TiB2,the hardness and abrasion resistance of high chromium alloys can be increased greatly.This paper mainly analyzed the effects of B4C content on the morphology and hardness by the method of flux-cored wire sub-merged arc welding,and measured macro hardness and observed micro structure.The results showed that the hardness and abrasion resistance increase when the B4C content increases (the suitable content of B4C is 1.5%~3.5%),but when the content is too high (the content of B4C is about 3.0%),the crack on high chromium appears.
