Effect of In-Situ Synthesis TiC on Microstructure and Properties ofHigh Chromium Cast Iron Surfacing Metal
摘 要
以自制的高铬铸铁药芯焊带为焊接材料,采用非熔化极惰性气体保护电弧焊(TIG)在低碳钢板上进行单层单道堆焊试验,通过在药芯焊带药粉中添加不同质量分数(0~5.2%)的钛铁粉,研究了原位自生TiC对堆焊金属组织和性能的影响。结果表明:药芯焊带药粉中加入钛铁粉后,堆焊金属中除了含有Cr7C3硬质相外,还原位析出TiC相,Cr7C3尺寸减小,分布更均匀,数量明显增加;当药粉中钛铁粉质量分数为5.2%时,堆焊金属中Cr7C3细化最明显,分布最均匀;随着药芯焊带药粉中钛铁粉含量的增加,堆焊金属的硬度和耐磨性提高。液态金属中原位合成的TiC可作为Cr7C3的异质形核核心,减小了Cr7C3的形核阻力,从而细化了Cr7C3。
Abstract
Using self-made high chromium cast iron flux-cored welding tape as welding material, single-layer single-pass surfacing tests were carried out by non-melting inert gas arc welding (TIG) on low carbon steel plate. The effect of in-situ synthesis TiC on the microstructure and properties of surfacing metal was studied by adding different mass fraction (0-5.2%) of ferro-titanitum powder in the flux-cored welding tape powder. The results show that after adding ferro-titanium powder to the flux-cored welding tape powder, there was in-situ synthesis TiC phase in the surfacing metal except Cr7C3 hard phase; the size of Cr7C3 decreased, the distribution was relatively uniform, and the number increased significantly. When the mass fraction of ferro-titanium powder in the powder was 5.2%, the refinement of Cr7C3 in the surfacing metal was the most obvious, and the distribution was the most uniform. With increasing ferro-titanium powder content in the flux-cored welding tape powder, the hardness and wear resistance of the surfacing metal increased. The TiC synthesized in situ in the liquid metal could be used as the heterogeneous nucleation core of Cr7C3, which reduced the nucleation resistance of Cr7C3 and thus refined Cr7C3.
中图分类号 TG422 DOI 10.11973/jxgccl202109006
所属栏目 试验研究
基金项目 山东省重大科技创新工程项目(2019JZZY020208)
收稿日期 2020/9/15
修改稿日期 2021/8/18
网络出版日期
作者单位点击查看
备注王驰(1993-),男,山东枣庄人,硕士研究生
引用该论文: WANG Chi,SUN Junsheng,XU Hu,JIN Jun,TANTAI Fanliang,TIAN Hongfang. Effect of In-Situ Synthesis TiC on Microstructure and Properties ofHigh Chromium Cast Iron Surfacing Metal[J]. Materials for mechancial engineering, 2021, 45(9): 30~34
王驰,孙俊生,徐虎,靳军,澹台凡亮,田洪芳. 原位自生TiC对高铬铸铁堆焊金属组织与性能的影响[J]. 机械工程材料, 2021, 45(9): 30~34
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【4】寇小平.变质处理对金属型铸造高铬铸铁组织与性能的影响[D].汉中:陕西理工学院, 2015. KOU X P.Effect of modification on microstructure and properties of permanent-mould high chromium cast iron[D].Hanzhong:Shaanxi University of Technology, 2015.
【5】吴平.高铬铸铁药芯焊带堆焊金属的组织和性能研究[J].科技信息, 2012(2):344-344. WU P.Research on microstructure and properties of surfacing metal of high chromium cast iron flux-cored welding tape[J].Science & Technology Information, 2012(2):344-344.
【6】牛翰卿, 王晓莉, 李正东, 等. 中速磨煤机磨辊材料及表面强化技术研究进展[J].铸造技术, 2020, 41(6):576-578. NIU H Q, WANG X L, LI Z D, et al. Research progress of roller materials and surface strengthening technology for medium speed coal mill[J]. Foundry Technology, 2020, 41(6):576-578.
【7】吴振卿, 宫红亮, 高华, 等. 高铬铸铁堆焊锤柄双金属复合锤头的开发研究[J].铸造设备与工艺, 2013(2):9-10. WU Z Q, GONG H L, GAO H, et al. Development of high chromium iron overlay on duplex metal composition hanmmer handle[J]. Foundry Equipment and Technology, 2013(2):9-10.
【8】智小慧, 韩彦军, 彭纪云, 等.钛细化过共晶高铬铸铁的研究[J].稀有金属材料与工程, 2008, 37(1):101-104. ZHI X H, HAN Y J, PENG J Y, et al.Effect of titanium on the microstructure of hypereutectic high-chromium cast iron[J].Rare Metal Materials and Engineering, 2008, 37(1):101-104.
【9】智小慧, 韩彦军, 邢建东, 等. 钛细化过共晶高铬铸铁机制的研究[J].稀有金属材料与工程, 2011, 40(增刊2):237-240. ZHI X H, HAN Y J, XING J D, et al. Refining mechanism of Ti on hypereutectic high-chromium cast iron[J].Rare Metal Materials and Engineering, 2011, 40(S2):237-240.
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【12】高启瑞, 宋波, 郭占成, 等. 含钛高炉碳化渣中TiC的超重力富集与分离的研究[J].稀有金属, 2018, 42(4):421-428. GAO Q R, SONG B, GUO Z C, et al. Enrichment and separation of TiC phase from carbonized titanium-bearing blast furnace slag by super gravity[J]. Chinese Journal of Rare Metals, 2018, 42(4):421-428.
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