搅拌船用耐磨板YG20、Q355与TU1铜钎焊接头的性能分析  

Performance Analysis of YG20,Q355 and TU1 Copper Brazed Joint for Wear Plate of Concrete Agitator Ship

作　　者：陈吉 张笋 刘进福 张骞 CHEN Ji;ZHANG Sun;LIU Jin-fu;ZHANG Qian(Changzhou Vocational Institute of Industry Technology,Changzhou Jiangsu 213164,China;CRRC Qishuyan Locomotive Co.Ltd.,Changzhou Jiangsu 213011,China;Hudong Zhonghua Shipbuilding(Group)Co.,Ltd.,Shanghai 200129,China)

机构地区：[1]常州工业职业技术学院,江苏常州213164 [2]中车戚墅堰机车有限公司,江苏常州213011 [3]沪东中华造船集团有限公司,上海200129

出　　处：《船海工程》2024年第1期62-66,共5页Ship & Ocean Engineering

基　　金：江苏省自然科学基金(BK20220241);江苏省高等学校自然科学基金(21KJB460006)。

摘　　要：针对引进的国外某型搅拌船中的易损件中的耐磨板机械性能问题,选用硬质合金YG20与Q355低合金钢作为母材、TU1无氧铜作钎料进行真空钎焊,在不同的钎缝间隙下,进行焊接接头进行性能试验,对拉伸试样与冲击试样的断口形貌进行SEM扫描,结果表明,YG20与Q355在TU1无氧铜作为钎料进行钎焊时,当钎缝间隙小于0.5 mm时能够获得很好的焊接接头;在0.4 mm时接头性能最佳,抗拉强度为439.8 MPa,达到母材抗拉强度上限值的69.8%;当钎缝间隙大于0.5 mm后,性能急剧下降;钎缝间隙在0.2 mm以下时,焊接接头断口呈脆性断裂,在0.3 mm以上塑性断裂现象随间隙值的增大而显现出一定的塑性。YG20和Q355通过铜钎焊能够获得良好的焊接接头;综合考虑钎焊批量生产的操作性、焊接接头性能等因素,推荐焊缝间隙范围为0.2~0.5 mm。The welding process and joint performance of wear-resistant plate of concrete agitator ship were studied.The vacuum brazing was carried out by using hard alloy YG20 and Q355 low-alloy steel as base material and TU1 oxygen-free copper as filler metal.The performance of the welded joint was tested under different brazing gaps,and the fracture morphology of tensile sample and impact sample was scanned by SEM.It was shown that,when YG20 and Q355 are brazed in TU1 oxygen-free copper,a good joint can be obtained when the joint gap is less than 0.5 mm;when the brazing gap is 0.4 mm,the tensile strength of the joint is 439.8 MPa,which is 69.8%of the base metal;when the brazing gap is larger than 0.5 mm,the performance decreases sharply;when the gap of brazing gap is below 0.2 mm,the fracture of welding joint is brittle fracture,and when the brazing gap is above 0.2 mm,the plastic fracture phenomenon shows certain plasticity with the increase of the gap value.Considering the brazing operability and joint performance,the recommended range of weld gap is 0.2 mm~0.5 mm.

关 键 词：搅拌船耐磨板 钎焊 钎缝间隙 接头性能 

分 类 号：U671.83[交通运输工程—船舶及航道工程]