强化研磨加工中喷射压力对模具钢表面硬度的影响
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摘要
为了得到强化研磨中喷射压力对模具钢表面硬度影响规律,使用控制变量法把试样分成7组,对7组不同喷射压力下的试样进行硬度测量,推导出喷射压力对模具钢表面硬度的影响规律。该实验对试样精加工和采用了特定强化研磨料的配比,通过JMTT数字洛氏硬度计进行硬度测量,以压入硬度作为衡量模具钢表面硬度标准。结果表明喷射压力逐渐增加时,强度提升明显,当喷射压力再增大时,材料的硬度最后会趋于水平,增加不明显,加工后表面硬度可由50HRC提升至53～54HRC。
To be reinforced in the grinding effects of injection pressure on the steel surface hardness,using the control variable method divided the sample into seven groups,about 7 group of hardness measurement of the samples under different injection pressure,injection pressure is deduced for the influence lawof the steel surface hardness.In this experiment,the precision of the sample was processed and the ratio of the specific reinforced abrasive materials was used.The hardness was measured by the JMTT digital rockwell hardness tester,and the hardness was used as the standard for measuring the surface hardness of the die steel.Results showed that the injection pressure gradually increases,the strength increase significantly,when the injection pressure to increase,material hardness tend to last level,increase is not obvious,the processing surface hardness can be made of 50 HRC after up to 53 ～ 54 HRC.
To be reinforced in the grinding effects of injection pressure on the steel surface hardness,using the control variable method divided the sample into seven groups,about 7 group of hardness measurement of the samples under different injection pressure,injection pressure is deduced for the influence lawof the steel surface hardness.In this experiment,the precision of the sample was processed and the ratio of the specific reinforced abrasive materials was used.The hardness was measured by the JMTT digital rockwell hardness tester,and the hardness was used as the standard for measuring the surface hardness of the die steel.Results showed that the injection pressure gradually increases,the strength increase significantly,when the injection pressure to increase,material hardness tend to last level,increase is not obvious,the processing surface hardness can be made of 50 HRC after up to 53 ～ 54 HRC.
引文
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[2]徐耀坤.模具表面强化处理新技术[J].锻压技术,2011(1):58-60.
[3]余际星,华林,韩丛亚.模具表面强化技术的应用与模具寿命[J].锻压装备与制造技术,2014(1):62-66.
[4]栾伟玲,涂善东.喷丸表面改性技术的研究进展[J].中国机械工程,2005,16(15):1405-1409.
[5]王兵.45号钢、30CrMnSi及高温合金磨削实验研究[D].沈阳:东北大学,2010.
[6]王贞之.简明热处理手册[M].北京:中国工业出版社,1966.
[7]董星,段雄.高压水射流喷丸强化技术[J].表面技术,2014(1):48-49.
[8]郭培基,方慧,余景池.液体喷射抛光技术研究[J].激光杂志,2008(1):25-27.
[9]方慧,郭培基,余景池.液体喷射抛光材料去除机理的研究[J].光学技术,2004,30(2):248-250.
[10]虞伟良.硬度测试技术的新动态与发展趋势[J].理化检验(物理分册),2013,39(8):401-405,435.
[11]李河清,蔡珣,马峰,等.影响薄膜(涂层)硬度测试的因素[J].材料保护,2011,34(9):45-47.
[12]刘美华,李鸿琦,计宏伟,等.压痕硬度测试法的主要研究内容及其应用[J].理化检验(物理分册),2008,44(9):485-490.
[13]刘美华.压痕硬度测试中的力学问题研究[D].天津:天津大学,2007.
[14]何军利.Ti-6Al-4V合金回跳法测硬度试验中高应变速率的塑性流变行为[J].钛工业进展,2012(6):44.
[15]刘晓初,陈宥丞,周佳华,等.强化研磨加工渗氮性能实验及其分析[J].组合机床与自动化加工技术,2017(10):153-156.