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利用铁—硼系接触熔化作用的接触反应焊接法已在许多工厂中用来生产带柄刀具。例如用来生产直径50～90毫米的带柄刀具。过去这类刀具是用接触对焊法来连接切削部分和柄部。对焊法有许多缺点:高速钢消耗量大(切削部分毛坯的最小长度等于70～80毫米)、耗电量大、需要的设备复杂。采用接触反应焊接法可以降低高速钢消耗量,不需要专用设备。但刀具结构须作某些改变。图1所示是用接触反应焊接法制造的双金属焊接式锥形扩孔钻的典型结构。柄部1和切削部分2的圆柱形毛坯通过硼
Contact-reaction welding using iron-boron based contact melting has been used to produce shank tools in many plants. For example, used to produce 50 to 90 mm diameter shank tool. In the past this type of tool was used to contact the butt welding method to connect the cutting part and the handle. Butt welding has many disadvantages: high-speed steel consumption (cutting part of the rough minimum length equal to 70 to 80 mm), power consumption, the need for complex equipment. Contact reaction welding can reduce high-speed steel consumption, do not need special equipment. However, some changes to the tool structure are required. Figure 1 shows the typical structure of a bimetallic welded conical reamer made by contact-reaction welding. The cylindrical blank of the shank 1 and the cutting part 2 passes through the boron