磁处理参数对热压铁基金刚石钻头胎体力学性能影响
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摘要
钴基胎体金刚石钻头具有性能好、价格高的特点,以Fe代Co作为胎体材料是提高金刚石钻头性价比的主要方法之一。但是Fe替代Co后存在金刚石热损伤严重、被包镶强度不足、胎体抗冲击和耐磨性差等问题,因此改善热压铁基金刚石钻头胎体力学性能对降低钻探成本、提高钻探效率具有重要研究意义。利用自行设计的磁处理设备对铁基热压金刚石钻头胎体进行磁化处理,通过正交试验等方法研究了磁感应强度、磁场频率和磁处理时间对胎体硬度、抗弯强度和耐磨性的影响及其规律。试验结果表明:试验胎体硬度最优磁处理参数为0.8 T/8 Hz/3 min,磁处理后胎体抗弯强度最高提升了13.8%,耐磨性增加,特别是含金刚石的胎体磁处理后其磨损量可降低38.1%。
China is relatively short of cobalt resources.The price of diamond bits with Co as main matrix material is relatively expensive,and iron instead of Co as matrix material is one of the main methods to reduce the price of diamond bits.However,replacing Co with iron causes serious etche of diamond,insufficient inlay strength and resistance to impact of bit matrix.Hence,it is necessary to improve the hotpressed diamond bit matrix mechanical properties of iron-based to reduce drilling cost and better drilling efficiency.In this paper,the self-designed magnetic treatment equipment is used to magnetize the bit matrix of the hot-pressed diamond,and orthogonal test is employed to study the influence and regularity of magnetic induction,magnetic field frequency and processing time on hardness,bending strength and wear resistance of the bit matrix.The test results show that the surface hardness of bit matrix optimum parameters of magnetic treatment is 0.8T,8Hz and 3min,and after the magnetic treatment,the highest flexural strength of the bit matrix is increased by 13.8%,and the wear resistance also increases.Especially,the wear of the diamond containing matrix of magnetic treatment can be reduced by 38.1%.
China is relatively short of cobalt resources.The price of diamond bits with Co as main matrix material is relatively expensive,and iron instead of Co as matrix material is one of the main methods to reduce the price of diamond bits.However,replacing Co with iron causes serious etche of diamond,insufficient inlay strength and resistance to impact of bit matrix.Hence,it is necessary to improve the hotpressed diamond bit matrix mechanical properties of iron-based to reduce drilling cost and better drilling efficiency.In this paper,the self-designed magnetic treatment equipment is used to magnetize the bit matrix of the hot-pressed diamond,and orthogonal test is employed to study the influence and regularity of magnetic induction,magnetic field frequency and processing time on hardness,bending strength and wear resistance of the bit matrix.The test results show that the surface hardness of bit matrix optimum parameters of magnetic treatment is 0.8T,8Hz and 3min,and after the magnetic treatment,the highest flexural strength of the bit matrix is increased by 13.8%,and the wear resistance also increases.Especially,the wear of the diamond containing matrix of magnetic treatment can be reduced by 38.1%.
引文
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[19]Barbosa A de P,Bovrovnitchii G S,Skury A,et al.Structure,microstructure and mechanical properties of PM Fe-Cu-Co alloys[J].Materials and Design,2010,31:522-526.
[20]朱涛,刘政,邓居军.磁处理提升高速钢刀具切削性能的机理[J].钢铁研究学报,2015,27(6):45-50.
[21]钟群鹏,赵子华.断口学[M].北京:高等教育出版社,2006.
[2]Xie D,Wan L,Song D.Pressureless sintering curve and sintering activation energy of Fe-Co-Cu pre-alloyed powders[J].Materials and Design,2015,87:482-487.
[3]Borowiecka-Jamrozek J,Lachowski J.Modelling of retention of a diamond particle in matrices based on Fe Cu[J].Procedia Engineering,2017,177:289-296.
[4]潘晓毅,苏钰,谢德龙,等.Fe质量分数对金刚石钻头胎体及其钻进性能的影响研究[J].金刚石与磨料磨具工程,2017,37(2):16-19.
[5]Reis L,Amaral P M.,Li B,et al.Evaluation of the residual stresses due to the sintering process of diamond-metal matrix hot-pressed tools[J].Theoretical&Applied Fracture Mechanics,2008,49:226-231.
[6]Tan S,Fang X,Yang K,et al.A new composite impregnated diamond bit for extra-hard,compact and nonabrasive rock formation[J].International Journal of Refractory Metals and Hard Materials,2014,43:186-192.
[7]阎冠欣.热压高磷铁基胎体性能及其金刚石钻头研究[J].探矿工程:岩土钻掘工程,2009,36(5):75-77.
[8]Asai S,Sassa K,Tahashi M.Crystal orientation of non-magnetic materials by imposition of a high magnetic field[M].[S.l.]:Elsevier Ltd,2003(6):455-460.
[9]Wei Y,Zhang Y,Chen Y.Impact of material permeability on friction and wear properties under the interference of DC steady magnetic field[J].Tribology International,2013,57(1):162-169.
[10]林健,赵海燕,蔡志鹏.磁处理降低钢铁材料中残余应力的研究现状及展望[J].材料工程,2005(3):55-59.
[11]林健,赵海燕,蔡志鹏,等.磁处理改善低碳钢焊接接头的耐腐蚀性能[J].焊接学报,2006,27(1):61-64.
[12]马利平.微细刀具脉冲磁场强化处理方法及机理研究[D].北京:北京理工大学,2015.
[13]梁志强,马利平,王西彬,等.脉冲磁场对高速钢刀具材料摩擦磨损性能的影响[J].兵工学报,2015,36(5):904-910.
[14]张燕玲,任兴利,翟富刚,等.交变磁处理对金刚石结块性能影响的实验研究[J].金刚石与磨料磨具工程,2008,28(3):50-54
[15]段隆臣,刘鹏,高元宏,等.一种热压取芯式铁基金刚石钻头磁处理装置与方法[P].2017.中国,201710823085.7.
[16]宋燕利,华林,王垚.不同频率交变磁场下低合金钢焊缝微区磁致塑性变形与磁致伸缩的关系[J].机械工程材料,2009,33(8):73-76.
[17]董洪峰.烧结温度对Cu基合金胎体性能的影响[D].兰州:兰州理工大学,2011.
[18]Li W,Zhang J,Wang S,et al.Characterizations and mechanical properties of impregnable diamond segment using Cu-Fe-Co metal matrix[J].Rare Metals,2012,31:81-87.
[19]Barbosa A de P,Bovrovnitchii G S,Skury A,et al.Structure,microstructure and mechanical properties of PM Fe-Cu-Co alloys[J].Materials and Design,2010,31:522-526.
[20]朱涛,刘政,邓居军.磁处理提升高速钢刀具切削性能的机理[J].钢铁研究学报,2015,27(6):45-50.
[21]钟群鹏,赵子华.断口学[M].北京:高等教育出版社,2006.