Welding method for hard alloy and stainless steel composite rod pin
A technology of hard alloy and welding method, which is applied in the direction of welding equipment, welding/welding/cutting items, metal processing equipment, etc., can solve the problems of porosity, poor welding quality, and virtual welding, etc., to prevent deformation and damage, stress-reducing effect
Inactive Publication Date: 2020-06-16
株洲楚天硬质合金股份有限公司
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Problems solved by technology
[0006] The purpose of the present invention is to propose a new sand mill pin welding process for the problems of poor welding quality, virtual welding, porosity and insufficient strength in the existing sand mill pin welding process
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Embodiment 1
[0023] In order to make the technical features of the present invention more obvious and understandable, the welding process will be further described below in conjunction with the accompanying drawings.
[0024] The pin pin applied to the pin pin type sand mill of the present invention is made by adopting a welding process. Therefore, as mentioned in the background, the welding method can effectively save the alloy material used to make the rod and reduce the production cost of the rod compared with the overall cutting method.
[0025] Such as figure 1 As shown, the welding parts that need to be welded by the welding process of the present invention include installation parts and working parts. Welding process of the present invention such as figure 2 steps shown. Step 1, preparation before welding. Before welding, check whether the cemented carbide is cracked, and perform sandblasting on the cemented carbide to remove the oxide layer on the brazing surface of the cement...
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The invention discloses a welding method for a hard alloy and stainless steel composite rod pin. The welding method is characterized by comprising the welding two welding parts, namely a mounting partand a working part; the welding process comprises the following steps that 1), preparation before welding is carried out, specifically, firstly, whether a hard alloy has bad defects such as cracks and bending or not is checked; 2), stainless steel, the hard alloy, brazing filler metal and mixed soldering flux are preheated, and then cooling is carried out; 3), reheating is carried out until the brazing filler metal is molten, the head part of the stainless steel is slightly knocked by using a red copper pressurizing rod to enable the brazing filler metal to make full contact with the stainless steel, and slag and gas of a weld seam are removed; 4), after brazing, a workpiece is put into a furnace at the temperature of 220 - 250 DEG C to be tempered for 6 - 8 H so as to eliminate part of brazing stress; 5), post-welding cleaning is carried out, specifically, the welded rod pin is cleaned so that residual brazing filler metal around the welding seam can be removed thoroughly, otherwise,a grinding wheel can be blocked by the redundant brazing filler metal during tool sharpening, and therefore grinding is difficult; and 6), post-welding quality detection and subsequent machining arecarried out.
Description
technical field [0001] The invention relates to a method for manufacturing hard alloy products, in particular to a method for manufacturing cemented carbide and stainless steel composite pins by welding, and belongs to the technical field of alloy product manufacturing. Background technique: [0002] With the rapid development of sand grinding technology, the performance of sand mills has also been continuously improved. Therefore, the processing of the sand mill has become more refined, and its requirements have become more stringent. With the improvement of the performance of the sand mill, the requirements for its core component, the rod pin, are also getting higher and higher. [0003] At present, the material used to make pins of sand mills is generally cemented carbide, which is a mixture of metal carbide powder and cobalt. Commonly used metal carbides are tungsten carbide, titanium carbide, etc. The rod pin of cemented carbide material can realize efficient nano-gri...
Claims
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IPC IPC(8): B23K1/002B23K1/20B23K1/19B23K103/04
CPCB23K1/002B23K1/19B23K1/203
Inventor 唐迎春
Owner 株洲楚天硬质合金股份有限公司