研究了热轧焊接镶钢机械刀片的焊缝和母材的组织及性能.结果表明,热轧焊接镶钢经热处理之后,刃钢与刀体己完全冶金结合在一起;合金钢刃钢的显微组织细化均匀,是以最佳的热处理工艺为保证的;Q235钢刀体显微组织复杂,与热轧镶钢工艺和随后的热处理工艺均有关.焊缝剪切强度通常为196～343 MPa,焊缝碳扩散层较深,提高焊缝强度的关键是降低焊线的夹杂和气孔率.依照热轧焊接机理分析认为,提高加热温度和加大压轧变形量都有利于结合面的固相焊接,合理的温度和轧下量不仅是获得优良显微组织的要求,也是降低能源消耗和轧机功率的需要.
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