ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2017, Vol. 38 ›› Issue (1): 49-53.

• 组织和性能 • 上一篇    下一篇

加热工艺对冷拔-钎焊不锈钢/碳钢复合钢筋界面性能的影响

高亚男1,鲍远通1,张全逾1,肖 宏2   

  1. 1承德石油高等专科学校汽车工程系,承德067000;
    2燕山大学国家冷轧板带装备及工艺工程技术研究中心,秦皇岛066004
  • 收稿日期:2016-08-30 出版日期:2017-02-01 发布日期:2022-07-28
  • 作者简介:高亚男(1982-),男,博士,工程师,2005年河北理工大学 (本科)毕业,金属变形过程的计算机模拟/层状复合材料成 形的研究。 张全逾(1980-),男,副教授,河北工业大学机械工程专业硕 士研究生毕业。
  • 基金资助:
    国家自然科学基金项目(51075353);
    承德市科技计 划项目(201601A088)资助

Effect of Heating Process on Interface Performance of Cold Drawing-Brazing Stainless Steel/ Carbon Steel Cladding Bar

Gao Yanan1 , Bao Yuantong1 , Zhang Quanyu1 , Xiao Hong2   

  1. 1 Department of Automotive Engineering, Chengde Petroleum College, Chengde 067000;
    2 National Engineering Research Center for Equipment and Technology of Cold Rolling Strip, Yanshan University, Qinhuangdao 066004
  • Received:2016-08-30 Published:2017-02-01 Online:2022-07-28

摘要: Φ22 mm×2 mm 304不锈钢管-0.1 mm铜箔-Φ17.2 mm Q195钢筋经10%减径冷拔使3层金属紧密结合,再经1150℃加热钎焊得到不锈钢/碳钢复合钢筋。研究了1 100~1 225℃保温1 h和1150℃的保温时间(0.54 h)对复合钢筋结合界面组织性能的影响。结果表明,1150℃加热后钎焊金属界面强度最大为296 MPa,铜箔作为钎焊层可以有效的实现不锈钢层和碳钢层的冶金结合;随1 150℃保温时间增加,不锈钢和碳钢之间的元素扩散距离和浓度增加,保温2 h,碳钢侧的Fe扩散到铜层约80μm,不锈钢侧的Cr和Ni扩散到碳钢内部约60μm,铜钎焊层出现含Cr、Ni的气泡状铁基固溶体并变大变多;界面区域的剪切强度和显微硬度随保温时间呈先增大后减小的趋势,保温2 h后达到最大值,分别为301 MPa和HV423。

关键词: 304不锈钢-Q195碳钢复合钢筋, 冷拔, 铜钎焊, 1150℃保温时间, 剪切强度

Abstract: The Φ22 mm x 2 mm 304 stainless steel tube-0. 1 mm copper foil-Φ17. 2 mm Q195 reinforce steel bar is cold-drawn by reduction 10% in diameter to make the 3 layer metal closed contact, than heated and brazed at 1 150 ℃ to get Stainless steel/carbon steel clad bar. The effect of heating temperature 1 100 〜1 225 ℃ for i h and holding time (0. 5 〜4 h) at 1 150 ℃ on structure and performance of contacted interface of clad reinforce bar has been studied. Results show that the strength of brazing metal interface heated at 1 150 ℃ is maximum , i. e. 296 MPa, and the copper foil as a brazing layer is available to fulfill the metallurgical combination of stainless steel layer and carbon steel layer; with increasing holding time at 1 150 ℃,the diffusion distance and concentration of elements between stainless steel and carbon steel increase, with holding for 2 h the Fe in carbon steel side diffuses into copper foil about 80μm and the Cr and Ni in stainless steel side diffuse into carbon steel about 60μm; and the bubble type iron base solid solution containing Cr and Ni occurred in copper brazing layer becomes larger and increases ; and with increasing holding time the shear strength and micro hardness of interface area are increase first and then decrease, and with holding for 2 h the shear strength and micro hardness are up to maximum and respectively 301 MPa and HV423.

Key words: 304 Stainless Steel-Q195 Carbon Steel Cladding Reinforce Bar, Cold Drawing, Copper Brazing, Holding Time at 1 150 °C, Shearing-Strength