Residual Stress in Soldering and Brazing Between Cemented Carbide and Steel Substrate of Shield Machine Cutters

doi:10.12068/j.issn.1005-3026.2020.01.018

Abstract

Abstract: Aiming at the problem that shield machine cutters are prone to welding cracks and the residual stress is too large， which leads to the alloy spalling easily in the cutting process of cutters， the finite element analysis model of the brazing process of cutters was established， and the brazing temperature field and residual stress field of cutters with different welding structures were studied through simulation calculation and X-ray diffractometer experimental verification. The results show that the temperature field presents a gradient distribution in the cooling process after brazing the cutter head. When the thickness of the solder is 0.25mm， the residual stress in the dangerous area of cutter head stress is the smallest. The number of cemented carbide blocks of 160mm blade width cutters is designed as 3 pieces to reduce welding residual stress and improve welding strength. The results of residual stress test are basically consistent with the numerical simulation results， and the surface of steel matrix is compressive stress.

Key words: shield machine cutters, cemented carbide, steel matrix;soldering and brazing, residual stress

CLC Number:

TG454

XIA Yi-min， TONG Lei， BAI Bin， HUA Wei-ming. Residual Stress in Soldering and Brazing Between Cemented Carbide and Steel Substrate of Shield Machine Cutters[J]. Journal of Northeastern University Natural Science, 2020, 41(1): 101-107.

References

[1]Li X，Li X，Yuan D.Application of an wear analysis method to cutting tools used in tunneling shields in soft ground［J］.Wear，2017，392:21-28.
[2]Hasanabadi M，Shamsipur A，Sani H N，et al.Interfacial microstructure and mechanical properties of tungsten carbide brazed joints using Ag-Cu-Zn +Ni/Mn filler alloy［J］.Transactions of Nonferrous Metals Society of China，2017，27(12):2638-2646.
[3]Tkalich D，Kane A，Saai A，et al.Wear of cemented tungsten carbide percussive drill-bit inserts:laboratory and field study［J］.Wear，2017，386/387:106-117.
[4]Nagentrau M，Tobi A L M，Kamdi Z，et al.A study on wear failure analysis of tungsten carbide hardfacing on carbon steel blade in a digester tank［J］.Journal of Failure Analysis & Prevention，2017，17(5):861-870.
[5]葛志德，郭勐，荆皓.硬质合金钎焊工艺的研究［J］.机械制造，2018，246(56):60-63.(Ge Zhi-de，Guo Meng，Jing Hao，et al.Study on brazing process of cemented carbide［J］.Machinery，2018，246(56):60-63.)
[6]岳喜山，孙凤莲.硬质合金圆环与钢基体钎焊过程的数值模拟［J］.焊接学报，2005，26(9):35-38.(Yue Xi-shan，Sun Feng-lian.Numerical simulation of brazing process between cemented carbide ring and steel substrate.［J］.Transactions of the China Welding Institution，2005，26(9):35-38.)
[7]刘海汉，李强，陈小勇，等.有限元法在钎焊中残余应力的分析及应用［J］.电焊机，2018，48(1):5-8.(Liu Hai-han，Li Qiang，Chen Xiao-yong，et al.Analysis and application of residual stress in brazing by finite element method［J］.Electric Welding Machine，2018，48(1):5-8.)
[8]黄须强，王大伟，修世超.AISI304/低碳钢真空扩散焊接头组织和性能［J］.东北大学学报(自然科学版)，2017，38(12):1759-1763.(Huang Xu-qiang，Wang Da-wei，Xiu Shi-chao.Microstructure and performance of AISI304 /mild steel vacuum diffusion bonded joint［J］.Journal of Northeastern University(Natural Science)，2017，38(12):1759-1763.)
[9]任朝晖，鞠建忠，吕冬杰，等.试件形状对铝合金摩擦叠焊成形的影响［J］.东北大学学报(自然科学版)，2017，39(7):1000-1004.(Ren Zhao-hui，Ju Jian-zhong，Lyu Dong-jie，et al.Effects of specimen shapes on the friction hydro-pillar processing forming of aluminum alloys［J］.Journal of Northeastern University(Natural Science)，2017，39(7):1000-1004.)
[10]Cui J，Zhai Q，Xu J，et al.Adding Sn on the performance of amorphous brazing fillers applied to brazing TA2 and Q235［J］.Journal of Surface Engineered Materials & Advanced Technology，2014，4(6):342-347.
[11]耿鲁阳，涂善东，巩建鸣，等.不同材料硬化模型模拟13MnNiMoR钢超厚圆筒对接环焊接残余应力［J］.机械工程材料，2019，43(3):60-66.(Geng Lu-yang，Tu Shan-dong，Gong Jian-ming，et al.Simulation of welding residual stress of 13MnNiMoR super thick cylinder butt ring by different material hardening model［J］.Materials for Mechanical Engineering，2019，43(3):60-66.)
[12]Barrena M I，Salazar J M G D，Gómez-Vacas M.Numerical simulation and experimental analysis of vacuum brazing for steel/cermet［J］.Ceramics International，2014，40(7):10557-10563.
[13]Zhang J，Jin L Y .Numerical simulation of residual stress in brazing joint between cemented carbide and steel［J］.Metal Science Journal，2013，21(12):1455-1459.
[14]Sui Y，Luo H，Lv Y，et al.Influence of brazing technology on the microstructure and properties of YG20C cemented carbide and 16Mn steel joints［J］.Welding in the World，2016，60(6):1269-1275.
[15]Nagatsuka K，Sechi Y，Ma N，et al.Simulation of cracking phenomena during laser brazing of ceramics and cemented carbide［J］.Science and Technology of Welding and Joining，2014，19(8):682-688.
[16]Kaiwa K，Yaoita S，Sasaki T，et al.Effects of Ni and Co additions to filler metals on Ag-brazed joints of cemented carbide and martensitic stainless steel［J］.Advanced Materials Research，2014，922:322-327.
[17]Li X，Ye J，Zhang H，et al.Sandblasting induced stress release and enhanced adhesion strength of diamond films deposited on austenite stainless steel［J］.Applied Surface Science，2017，412:366-373.
[15]关守平，房少纯.一种新型的区间-粒子群优化算法［J］.东北大学学报(自然科学版)，2012，33(10):1381-1384.(Guan Shou-ping，Fang Shao-chun.A new particle swarm optimization algorithm［J］.Journal of Northeastern University(Natural Science)，2012，33(10):1381-1384.)(上接第88页)
[7]Sun Y，Gong Y D.Experimental study on the microelectrodes fabrication using low speed wire electrical discharge turning(LS-WEDT) combined with multiple cutting strategy［J］.Journal of Materials Processing Technology，2017，250:121-131.
[8]Fang F Z，Wu H，Liu X D，et a1.Tool geometry study in micro machining［J］.Journal of Micromechanics and Micro Engineering，2003，13(5):726-731.
[9]Kuppan P，Rajadurai A，Narayanan S.Influence of EDM process parameters in deep hole drilling of Inconel 718［J］.The International Journal of Advanced Manufacturing Technology，2008，38(1/2):74-84.
[10]张雷.深小孔微细电火花加工间隙流场仿真及实验研究［D］.哈尔滨:哈尔滨工业大学，2011.(Zhang Lei.Simulation and experiment research of gap flow for micro-EDM deep-small hole machining［D］.Harbin:Harbin Institute of Technology，2011.)
[11]Zhao W S，Wang Z L，Di S C，et al.Ultrasonic and electric discharge machining to deep and small hole on titanium alloy［J］.Journal of Materials Processing Technology，2002，120(1):101-106.
[12]Sun Y，Gong Y D.Experimental study on fabricating spirals microelectrode and micro-cutting tools by low speed wire electrical discharge turning［J］.Journal of Materials Processing Technology，2018，258:271-285.
[13]高连，刘志东，邱明波，等.电火花线切割单晶硅的损伤层［J］.硅酸盐学报，2011，39(5):874-879.(Gao Lian，Liu Zhi-dong，Qiu Ming-bo，et al.Damaged layer of monocrystalline silicon cut by wire electrical discharge machining［J］.Journal of the Chinese Ceramic Society，2011，39(5):874-879.)
[15]关守平，房少纯.一种新型的区间-粒子群优化算法［J］.东北大学学报(自然科学版)，2012，33(10):1381-1384.(Guan Shou-ping，Fang Shao-chun.A new particle swarm optimization algorithm［J］.Journal of Northeastern University(Natural Science)，2012，33(10):1381-1384.)