The invention relates to a thermal spraying process for tungsten carbide grinding roller of grain and oil machine, which comprises the following steps: before thermal spraying, the substrate is tested and determined to be chromium molybdenum alloy; the geometric dimension is tested to ensure that the surface of tungsten carbide grinding roller is free of machining defects and the hardness is hrc55-58 degrees; before spraying, the tungsten carbide grinding roller is preheated to 55-65 degrees Celsius; the powder feeder is started to transport the prepared tungsten alloy powder to combustion The chamber is heated to 1800 \u2103 and in the molten state; the high-pressure fan is started to spray molten tungsten alloy liquid to the surface of tungsten carbide grinding roller at the speed of 840 meters per second; the spray gun moves axially along the rotating tungsten carbide grinding roller to form tungsten alloy coating; the thickness of coating is 0.02-0.04mm, the hardness is hv1300-1500, the surface roughness of toothed roller is ra0.2-0.8, and the roughness of smooth roller is greater than ra3.2; Mark the finished products into the box. The invention has the advantages of good toughness of the chromium molybdenum base material of the tungsten carbide grinding roller, no falling off and peeling, and high hardness of the thermal spraying coating, wear resistance, high temperature resistance and corrosion resistance.
【技术实现步骤摘要】
一种粮油机械磨粉机碳化钨磨辊的热喷涂工艺
本专利技术涉及一种碳化钨磨辊的热喷涂方法,尤其是一种韧性好,不掉块剥落、崩齿,硬度高,耐磨,耐高温,耐腐蚀的一种粮油机械磨粉机碳化钨磨辊(齿辊、光辊)热喷涂工艺。
技术介绍
现有的磨粉机磨辊采用离心铸造工艺。,磨辊的表面硬度为HS70~73,其工艺特性组织疏松、合金韧性差,加工与使用过种中表面易掉块剥落,影响使用寿命与产品质量。
技术实现思路
为解决上述问题,本专利技术提供了一种韧性好,不掉块剥落、崩齿,硬度高,耐磨,耐高温,耐腐蚀的一种粮油机械磨粉机碳化钨磨辊的热喷涂工艺。实现本专利技术目的的一种粮油机械磨粉机碳化钨磨辊的热喷涂工艺,包括以下步骤:1)热喷涂前进行基材检测,确定为铬钼合金;进行几何尺寸检测,保证碳化钨磨辊表面无加工缺陷,硬度HRC55~58度;2)喷涂前将碳化钨磨辊预热至55~65摄氏度;3)启动送粉器将配制好的钨合金粉输送至燃烧室,加热到1800摄氏度,成熔溶状态;4)启动高压风机将熔溶状的钨合金液流,以每秒840米的速度喷向碳化钨磨辊表面;5)喷枪沿自转的碳化钨磨辊做轴向移动,形成钨合金涂层;6)检测涂层厚度0.02~0.04mm、硬度HV1300~1500、齿辊表面粗糙度Ra0.2~0.8、光辊粗糙度大于Ra3.2;7)成品打标入箱。该专利技术具有如下优点:1)碳化钨磨辊铬钼基材韧性好,不掉块剥落、崩齿;2)热喷涂涂层硬度高,耐磨、耐高温、耐腐蚀;3)基于以上基 ...
【技术保护点】
1.一种粮油机械磨粉机碳化钨磨辊的热喷涂工艺,包括以下步骤:/n1)热喷涂前进行基材检测,确定为铬钼合金;进行几何尺寸检测,保证碳化钨磨辊表面无加工缺陷,硬度HRC55~58度;/n2)喷涂前将碳化钨磨辊预热至55~65摄氏度;/n3)启动送粉器将配制好的钨合金粉输送至燃烧室,加热到1800摄氏度,成熔溶状态;/n4)启动高压风机将熔溶状的钨合金液流,以每秒840米的速度喷向碳化钨磨辊表面;/n5)喷枪沿自转的碳化钨磨辊做轴向移动,形成钨合金涂层;/n6)检测涂层厚度0.02~0.04mm、硬度HV1300~1500、齿辊表面粗糙度Ra0.2~0.8、光辊粗糙度大于Ra3.2;/n7)成品打标入箱。/n
【技术特征摘要】
1.一种粮油机械磨粉机碳化钨磨辊的热喷涂工艺,包括以下步骤:
1)热喷涂前进行基材检测,确定为铬钼合金;进行几何尺寸检测,保证碳化钨磨辊表面无加工缺陷,硬度HRC55~58度;
2)喷涂前将碳化钨磨辊预热至55~65摄氏度;
3)启动送粉器将配制好的钨合金粉输送至燃烧室,加热到1800摄氏度,成熔...
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