力學(xué)性能的影響
(1. 高新張銅股份有限公司，張家港 215600；
2. 大連理工大學(xué) 材料科學(xué)與工程學(xué)院，大連 116024)
摘 要: 研究旋轉(zhuǎn)電磁場(chǎng)對(duì)水平連鑄空心BFe10−1−1合金管坯凝固組織和力學(xué)性能的影響，并對(duì)其機(jī)理進(jìn)行初步的探討。結(jié)果表明：在工頻旋轉(zhuǎn)電磁場(chǎng)的攪拌作用下，BFe10−1−1合金管坯的凝固組織顯著細(xì)化，由粗大的柱狀晶完全轉(zhuǎn)化為均勻細(xì)小的等軸晶，同時(shí)抑制了Ni元素的枝晶偏析；施加電磁場(chǎng)后管坯的力學(xué)性能得到明顯改善，當(dāng)勵(lì)磁電流為80 A時(shí)，管坯抗拉強(qiáng)度提高了15.3%，屈服強(qiáng)度提高了10.9%，伸長(zhǎng)率提高了58.6%。
關(guān)鍵字: BFe10−1−1合金；空心管坯；旋轉(zhuǎn)電磁場(chǎng)；水平連鑄
mechanical properties of tube billets of BFe10−1−1 alloy
YAN Zhi-ming2, LI Ting-ju2
（1. Gaoxin Zhangtong Co. LTD., Zhangjiagang 215600, China;
2. School of Materials Science and Engineering,
Dalian University of Science and Technology, Dalian 116024, China）
Abstract:The effects of rotating electromagnetic field on the solidification structure and mechanical properties of horizontal continuously cast tube billets of BFe10−1−1 alloy were investigated and theoretically interpreted. The results indicate that the conventional coarse columnar grains change to fine equiaxed ones with the application of commercial frequency electromagnetic field during horizontal continuous casting. Meanwhile, the segregation of Ni element is suppressed and distributes more uniformly over the cross section. After the electromagnetic treatment, the tensile strength of the billets are all improved, and when the input current is 80 A, the increase of tensile strength, elongation and hardness are 15.3%, 10.9% and 58.6%, respectively.
Key words: BFe10-1-1alloy; tube billet; rotating-electromagnetic field; horizontal continuous casting
