WO2011038549A1

WO2011038549A1 - Heating surface and preparation method thereof

Info

Publication number: WO2011038549A1
Application number: PCT/CN2009/074336
Authority: WO
Inventors: 钱远强; 倪卫东
Original assignee: 高标国际有限公司
Priority date: 2009-09-30
Filing date: 2009-09-30
Publication date: 2011-04-07
Also published as: CN102510910A

Abstract

A heating surface spray-coated with cemented carbide, a method for spray-coating a heating surface with cemented carbide, the heating surface obtained by the method, a product having the heating surface, and a use of cemented carbide on the heating surface which comprises spray-coating cemented carbide on the heating surface. The cemented carbide coating has advantages of impact resistance, high temperature resistance and abrasion resistance.

Description

加热面及其制备方法技术领域 Heating surface and preparation method thereof

本申请涉及加热面及其制备方法。背景 The present application relates to a heating surface and a method of preparing the same. Background

多种工业及家用产品中会涉及用来对外界物质进行加热的加热面。该加热面可以被工业及家用产品内部的热源如电、磁、明火、蒸汽等加热。被内部热源加热后的加热面可用于对不同的外部对象进行接触式或非接触式加热。 Heating surfaces for heating foreign materials are involved in a variety of industrial and household products. The heating surface can be heated by heat sources such as electricity, magnetism, open flame, steam, etc. inside industrial and domestic products. The heated surface heated by the internal heat source can be used for contact or non-contact heating of different external objects.

在上述加热面中，利用电加热的电热面在家电产品中具有广泛的应用。家电产品的电热面包括但不限于：电熨斗的底板、电热水器的电热片或板、电烤炉中烤盘面与食品接触的电热面、三文治机中电热板与食品接触的面、电炉的烤盘、电烧烤中的烤盘、咖啡蒸馏器的发热片、电炸锅的胆、电锅的锅面、电烧烤炉的炉壁或炉面、电饭煲或微波炉的炉壁或炉胆以及煮奶器的内胆等。 Among the above heating surfaces, electrically heated electric surfaces have a wide range of applications in home appliances. The electric heating surface of household electrical appliances includes but is not limited to: the bottom plate of the electric iron, the electric heating plate or plate of the electric water heater, the electric heating surface in contact with the food in the baking oven, the electric heating plate in contact with the food in the sandwich machine, and the baking of the electric furnace Plate, baking tray in electric grill, heating plate for coffee distiller, bile of electric fryer, pot noodle on electric cooker, wall or stove top of electric grill, wall or stove of rice cooker or microwave oven, and boiled milk The inner liner of the device.

为了达到不粘且容易清洁的目的，工业及家用产品的加热面一般会具有涂层。常用的涂层为 PTFE化学涂层，该化学涂层的缺点包括： 1、抗温最高为 260。C, 超温会产生有毒气体，危害生物； 2、结合力差，使用时容易脱落，脱落的涂层会对环境及人体产生损害； 3、涂料喷涂时会严重污染水源及环境； 4、涂料在烧结成型时会产生有毒气体，污染环境，并加剧温室效应； 5、硬度只有大于 4H, 使用时只能接触胶质或软性的器具，不能使用较硬的器具。 In order to achieve non-stick and easy cleaning, the heating surfaces of industrial and household products generally have a coating. Commonly used coatings are PTFE chemical coatings. The disadvantages of this chemical coating include: 1. The maximum temperature resistance is 260. C, over-temperature will produce toxic gases, harmful to the organism; 2, poor bonding, easy to fall off when used, the coating will fall off the environment and the human body; 3, the paint will seriously pollute the water source and the environment; 4, coating In the case of sintering, toxic gases are generated, which pollute the environment and aggravate the greenhouse effect. 5. Hardness is only greater than 4H. When used, it can only be contacted with colloidal or soft utensils. Harder appliances cannot be used.

由于具有以上缺点， PTFE涂层的使用寿命较短，一般不超过一年，通常使用半年左右涂层就发生脱落。 Due to the above disadvantages, the service life of the PTFE coating is short, generally not more than one year, and the coating usually falls off after about half a year.

因此，需要研制一种具有抗沖击、耐高温、耐磨损的涂层的加热面。概述 Therefore, there is a need to develop a heating surface having an impact resistant, high temperature resistant, abrasion resistant coating. Overview

本申请的一方面涉及喷涂有硬质合金的加热面。 One aspect of the present application relates to a heated surface that is sprayed with a cemented carbide.

本申请的另一方面涉及在加热面上应用硬质合金的方法，所述方法包括如下步骤： Another aspect of the present application relates to a method of applying a cemented carbide on a heating surface, the side The method includes the following steps:

将待加工的加热面进行粗化清洁处理；以及 Roughening and cleaning the heating surface to be processed;

使用热喷涂法将硬质合金材料喷涂于待加工的加热面，得到硬质合金涂层。 The cemented carbide material is sprayed onto the heating surface to be processed by thermal spraying to obtain a hard alloy coating.

本申请的另一方面涉及通过上述方法所获得的加热面。 Another aspect of the present application relates to a heating surface obtained by the above method.

本申请的另一方面涉及包含上述加热面的工业及家用产品。 Another aspect of the present application relates to industrial and household products comprising the above-described heating surface.

本申请的另一方面涉及硬质合金在加热面中的用途，所述用途包括将硬质合金喷涂在加热面上。详述 Another aspect of the present application relates to the use of a cemented carbide in a heated surface, the use comprising spraying a cemented carbide onto a heated surface. Detailed

以下的描述包括某些具体细节以便透彻理解各种公开的实施方案。然而，相关领域技术人员应当理解，可以无需一种或多种这些具体细节，或者可以使用其它方法、成分、材料等实践实施方案。 The following description includes certain specific details in order to provide a However, one skilled in the relevant art will understand that one or more of these specific details may be omitted, or other methods, components, materials, and the like may be used.

除非上下文另有要求，在以下的说明书及权利要求书中，术语"包含 Unless the context requires otherwise, in the following description and claims, the term "includes

(其对应的英文单词为 comprise)"及其英文单词的变化如 "comprises"和 "comprising"应解释为开放式的、包括的含义，即应解释为"包括，但不限于"。 (The corresponding English word is included)" and the changes in its English words such as "comprises" and "comprising" should be interpreted as open-ended, including meanings, which should be interpreted as "including, but not limited to".

整个说明书中所提及的 "一实施方案 (one embodiment)",或"实施方案 (an embodiment)", 或"在另一实施方案中"，或"某些实施方案"，或"在某些实施方案中"是指与所述实施方案相关的所描述的具体涉及的特征、结构或者特性被包括在至少一实施方案中。因此，在整个本说明书中的各个地方出现的短语"在一实施方案中"、 "在实施方案中"、 "在另一实施方案中"或者"在某些实施方案中"不必均指相同的实施方案。此外，具体特征、结构或者特性可以在一种或多种实施方案中以任何适当的方式相结合。 References throughout the specification to "one embodiment", or "an embodiment", or "in another embodiment", or "some embodiments", or "in certain "In the embodiments," it is meant that the features, structures, or characteristics specifically described in connection with the embodiments are included in at least one embodiment. Thus, appearances of the phrases "in one embodiment", "in an embodiment", "in another embodiment" or "in some embodiments" implementation plan. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

应当注意，如在本说明书和所附的权利要求书中所用的那样，单数形式 (其对应的英文单词为 "a"、 "an", 和" the")包括复数形式的提及物，除非上下文内容明确地另有所指。还应当注意，术语"或"通常以包括"和 / 或"的含义使用，除非上下文内容明确地另有所指。术语定义本申请中所用的术语 "加热面" 是指被工业或家用产品内部的热源加热，并用来对不同的外部对象进行接触式或非接触式加热的表面。所述的内部热源可包括但不限于电、磁、明火、蒸汽。 It should be noted that as used in the specification and the appended claims, the singular forms (the corresponding English words "a", "an", and "the" The contextual content is expressly stated otherwise. It should also be noted that the term "or" is generally used in the sense of "and/or" unless the context clearly dictates otherwise. Definition of Terms The term "heating surface" as used in this application refers to a surface that is heated by a heat source inside an industrial or household product and used to contact or non-contact heating different external objects. The internal heat source may include, but is not limited to, electricity, magnetism, open flame, steam.

本申请中所用的术语 "电热面" 是指被内部的电源加热，并用来对不同的外部对象进行接触式或非接触式加热的表面。本申请中的电热面包括但不限于：电熨斗的底板、电热水器的电热片或板、电烤炉中烤盘面与食品接触的电热面、三文治机中电热板与食品接触的面、电炉的烤盘、电烧烤中的烤盘、咖啡蒸馏器的发热片、电炸锅的胆、电锅的锅面、电烧烤炉的炉壁或炉面、电饭煲或微波炉的炉壁或炉胆以及煮奶器的内胆。 The term "heating surface" as used in this application refers to a surface that is heated by an internal power source and used to contact or non-contact heating different external objects. The electric heating surface in the present application includes but is not limited to: the bottom plate of the electric iron, the electric heating sheet or plate of the electric water heater, the electric heating surface of the baking pan surface in contact with the food in the electric oven, the surface of the electric heating plate in contact with the food in the sandwich machine, and the electric furnace. Baking tray, baking tray in electric grill, heating plate for coffee distiller, bile of electric fryer, pot noodle on electric cooker, furnace wall or stove top of electric grill, furnace wall or oven of rice cooker or microwave, and cooking The inner liner of the milk.

本申请中所用的术语 "硬质合金" 是指由难熔金属的硬质化合物和黏结金属组成的合金。硬质合金中常用的难熔金属硬质化合物主要是元素周期表中过渡金属的碳化物，包括但不限于碳化钨、碳化钛、碳化铬、碳化钽。黏结金属常用铁族元素，包括但不限于镍、钴。 The term "hard alloy" as used in this application refers to an alloy composed of a hard compound of a refractory metal and a bonding metal. The refractory metal hard compounds commonly used in cemented carbides are mainly carbides of transition metals in the periodic table, including but not limited to tungsten carbide, titanium carbide, chromium carbide, and tantalum carbide. Bonding metals commonly use iron-based elements, including but not limited to nickel and cobalt.

本申请中所用的术语 "热喷涂" 和 "熔射" 可互换使用，其是指利用某种热源 (如电弧、等离子喷涂或燃烧火焰等)将粉末状、棒状或丝状的金属或非金属材料加热到熔融或半熔融状态，然后借助焰流本身或压缩空气以一定速度喷射到预处理过的基体表面，沉积而形成具有各种功能的表面涂层的表面强化技术。 As used in this application, the terms "thermal spray" and "spray" are used interchangeably and refer to the use of a heat source (such as an electric arc, plasma spray or combustion flame, etc.) to form a powder, rod or filament of metal or non. The metal material is heated to a molten or semi-molten state and then sprayed onto the surface of the pretreated substrate by means of the flame stream itself or compressed air at a rate to deposit a surface strengthening technique for forming a surface coating having various functions.

本申请提供了一种具有抗沖击、耐高温、耐磨损的涂层的加热面。本申请的申请人发现，在工业及家用产品的加热面上，尤其是家电产品的电热面上喷涂硬质合金，得到的涂层具有抗沖击、耐高温、耐磨损的性能。 The present application provides a heating surface having a coating that is resistant to impact, high temperature, and abrasion. Applicants of the present application have found that hard alloys are sprayed on the heating surfaces of industrial and household products, especially on the electric heating surfaces of household electrical products, and the resulting coatings are resistant to impact, high temperature, and abrasion.

因此，本申请的一方面涉及喷涂有硬质合金的加热面。 Accordingly, one aspect of the present application relates to a heated surface that is sprayed with a cemented carbide.

在某些实施方案中，所述硬质合金选自碳化铬基、碳化钨基或碳化钨-碳化铬基硬质合金。 In certain embodiments, the cemented carbide is selected from the group consisting of chromium carbide based, tungsten carbide based or tungsten carbide-chromium carbide based cemented carbide.

在某些实施方案中，喷涂在所述加热面上的硬质合金的厚度为约 In certain embodiments, the thickness of the cemented carbide sprayed onto the heated surface is about

0.005 mm至约 0.25 mm。 0.005 mm to approximately 0.25 mm.

在某些实施方案中，所述加热面为电热面。 In certain embodiments, the heating surface is an electric heating surface.

在某些实施方案中，所述硬质合金为碳化铬基硬质合金。 In certain embodiments, the cemented carbide is a chromium carbide based cemented carbide.

在某些实施方案中，所述碳化铬基硬质合金选自碳化铬基镍铬硬质合金 (NiCr-Cr₃C₂)或碳化铬基钴铬合金 (CoCr-Cr₃C₂)。 In certain embodiments, the chromium carbide based cemented carbide is selected from the group consisting of chromium carbide based nickel chrome hard Alloy (NiCr-Cr ₃ C ₂ ) or chromium carbide-based cobalt-chromium alloy (CoCr-Cr ₃ C ₂ ).

在某些实施方案中，喷涂在所述加热面上的碳化铬基硬质合金的厚度为约 0.005 mm至约 0.25 mm。 In certain embodiments, the chromium carbide based cemented carbide sprayed onto the heated surface has a thickness of from about 0.005 mm to about 0.25 mm.

在某些实施方案中，所述硬质合金为碳化钨基硬质合金。 In certain embodiments, the cemented carbide is a tungsten carbide based cemented carbide.

在某些实施方案中，所述碳化钨基硬质合金选自碳化钨基镍硬质合金 (Ni-WC)或碳化钨基钴合金 (Co-WC)。 In certain embodiments, the tungsten carbide based cemented carbide is selected from the group consisting of tungsten carbide based nickel hard alloys (Ni-WC) or tungsten carbide based cobalt alloys (Co-WC).

在某些实施方案中，喷涂在所述加热面上的碳化钨基硬质合金的厚度为约 0.005 mm至约 0.25 mm。 In certain embodiments, the tungsten carbide-based cemented carbide sprayed onto the heated surface has a thickness of from about 0.005 mm to about 0.25 mm.

在某些实施方案中，所述硬质合金为碳化钨-碳化铬基硬质合金。在某些实施方案中，所述碳化钨-碳化铬基硬质合金选自碳化钨- 碳化铬 -镍硬质合金（Ni-WC-Cr₃C₂)或碳化钨 -碳化铬-钴合金In certain embodiments, the cemented carbide is a tungsten carbide-chromium carbide based cemented carbide. In certain embodiments, the tungsten carbide - chromium carbide based cemented carbide is selected from tungsten - carbide chromium - nickel carbide _{(Ni-WC-Cr 3 C} 2) or tungsten carbide - chromium carbide - cobalt alloy

(Co-WC-Cr₃C₂)。 (Co-WC-Cr ₃ C ₂ ).

在某些实施方案中，喷涂在所述加热面上的碳化钨 -碳化铬基硬质合金的厚度为约 0.005 mm至约 0.25 mm。 In certain embodiments, the tungsten carbide-chromium carbide based hard alloy sprayed on the heated surface has a thickness of from about 0.005 mm to about 0.25 mm.

在某些实施方案中，所述加热面上喷涂有多个硬质合金涂层，每一层的硬质合金可以相同或不同。 In certain embodiments, the heating surface is spray coated with a plurality of cemented carbide coatings, each of which may be the same or different.

本申请的另一方面涉及在加热面上应用硬质合金的方法，所述方法包括如下步骤： Another aspect of the present application relates to a method of applying a cemented carbide on a heating surface, the method comprising the steps of:

在某些实施方案中，所述碳化铬基硬质合金选自碳化铬基镍铬硬质合金 (NiCr-Cr₃C₂)或碳化铬基钴铬合金 (CoCr-Cr₃C₂)。 In certain embodiments, the chromium carbide based cemented carbide is selected from the group consisting of chromium carbide based nickel chrome cemented carbide (NiCr-Cr ₃ C ₂ ) or chromium carbide based cobalt chromium alloy (CoCr-Cr ₃ C ₂ ).

在某些实施方案中，所述加热面为电热面。在某些实施方案中，所述硬质合金为碳化钨基硬质合金。 In certain embodiments, the heating surface is an electric heating surface. In certain embodiments, the cemented carbide is a tungsten carbide based cemented carbide.

(Co-WC-Cr₃C₂)。 (Co-WC-Cr ₃ C ₂ ).

在某些实施方案中，还包括在所述加热面上喷涂多个硬质合金涂层，每一层的硬质合金可以相同或不同。 In certain embodiments, the method further includes spraying a plurality of cemented carbide coatings on the heating surface, the cemented carbide of each layer being the same or different.

在某些实施方案中，所述粗化清洁处理所用的方法是吹砂，其中使用粒度合适的砂粒 (如氧化铝砂、白刚玉、棕刚玉、石英砂等等）在高气压作用下撞击待加工的家电产品电热面，使其表面毛化 (表面粗糙度为 Ra l至 Ra 6), 从而可使涂层与表面具有高结合力。 In certain embodiments, the method used in the roughening cleaning process is sandblasting, in which sand particles of suitable particle size (such as alumina sand, white corundum, brown corundum, quartz sand, etc.) are used to impinge under high pressure. The electric heating surface of the processed home appliance has a surface roughening (surface roughness Ra Ra to Ra 6), so that the coating has a high bonding force with the surface.

本申请所用硬质合金材料的形式包括但不限于本领域所属技术人员公知的线材、粉材或棒材。 The form of the cemented carbide material used in the present application includes, but is not limited to, wires, powders or rods well known to those skilled in the art.

在上述方法中，喷涂所使用的热喷涂设备可以是高速或超音速等离子喷涂设备、高速或超音速火焰喷涂设备 (HVAF、 HVOF)、高速或超音速电弧喷涂设备以及***喷涂设备。 In the above method, the thermal spraying equipment used for spraying may be a high speed or supersonic plasma spraying apparatus, a high speed or supersonic flame spraying apparatus (HVAF, HVOF), a high speed or supersonic arc spraying apparatus, and an explosive spraying apparatus.

在某些实施方案中，喷涂时硬质合金材料熔射于待加工表面的粒子速度不小于 150米 /秒。 In some embodiments, the particle size of the cemented carbide material sprayed onto the surface to be processed during spraying is not less than 150 meters per second.

在某些实施方案中，所述方法还包括将得到的硬质合金涂层进行抛光或磨削加工处理的步骤。所用的抛光或磨削加工工具可以是不锈钢钢丝刷、砂布轮、砂纸球或抛光轮，所用的动力方式可以是气动或电动。 In certain embodiments, the method further comprises the step of subjecting the resulting cemented carbide coating to a polishing or grinding process. The polishing or grinding tool used may be a stainless steel wire brush, an abrasive cloth wheel, a sandpaper ball or a polishing wheel, and the power source may be pneumatic or electric.

在某些实施方案中，经过抛光或磨削加工后的硬质合金涂层厚度范围为约 0.005 mm至约 0.25 mm。 In certain embodiments, the cemented carbide coating after polishing or grinding has a thickness ranging from about 0.005 mm to about 0.25 mm.

本申请的另一方面涉及包含上述加热面的工业及家用产品。在某些实施方案中，所述加热面为电热面。 Another aspect of the present application relates to industrial and household products comprising the above-described heating surface. In certain embodiments, the heating surface is an electric heating surface.

在某些实施方案中，所述产品为家电产品。 In certain embodiments, the product is a home appliance.

本申请的另一方面涉及硬质合金在加热面中的用途，所述用途包括将硬质合金喷涂在加热面上。 Another aspect of the present application relates to the use of a cemented carbide in a heated surface, the use comprising spraying a cemented carbide onto a heated surface.

(Co-WC-Cr₃C₂)。 (Co-WC-Cr ₃ C ₂ ).

本申请使用的硬质合金涂层与非金属涂层（以 PTFE 涂层为例)相比有很大优点，如下表 1所示。 The cemented carbide coating used in this application has significant advantages over non-metallic coatings (for example, PTFE coatings), as shown in Table 1 below.

表 1 硬质合金涂层与 PTFE涂层的性能比较 Table 1 Comparison of properties between cemented carbide coating and PTFE coating

硬质合金涂层 Carbide coating

Ni-WC 涂层 PTFE涂层 NiCr-Cr₃C₂ Co-WC Ni-WC coated PTFE coating NiCr-Cr ₃ C ₂ Co-WC

CoCr-Cr₃C₂ Ni-WC-Cr₃C₂ CoCr-Cr ₃ C ₂ Ni-WC-Cr ₃ C ₂

Co-WC-Cr₃C₂ 表面硬度 < 4H > HRC40 > HRC50 耐温性能 < 260°C > 600°C > 600°C 抗粘性良好良好良好 Co-WC-Cr ₃ C ₂ surface hardness < 4H > HRC40 > HRC50 Temperature resistance < 260 ° C > 600 ° C > 600 ° C Good adhesion, good and good

传热效果一般很好很好 The heat transfer effect is generally very good. Very good.

结合力 < 3000 psi > 8000 psi > 8000 psi 耐酸碱能力很好很好很好 Bonding force < 3000 psi > 8000 psi > 8000 psi Acid and alkali resistance Very good Very good Very good

耐磨性 ^a 5万次至 8万次 -200万次 -200万次抗沖击能力差很好很好 Abrasion resistance ^a 50,000 times to 80,000 times - 2 million times - 2 million times the impact resistance is very good

专用辅助工具 Special aid

需配备不需配备不需配备情况 (如锅铲） Need to be equipped, no need to be equipped, no need to be equipped (such as spatula)

差 Poor

抗温差能力良好良好 Good temperature resistance, good, good

(不能急热急冷） (can't be hot and cold)

使用寿命至多 1年 20年 20年 ^a：耐磨性测试：用 1 kg压力压着编号为 7496的 3M®百洁布，来回 50 mm推拉，观察涂层有否现出底层金属的颜色如表 1所示，本申请的家电产品的电热面使用的硬质合金涂层与现有技术中家电产品的电热面使用的涂层相比有很大优点。从材料上来说，本申请的硬质合金涂层属于金属涂层，而现有技术中的涂层是非金属涂层或者是非金属与金属的混合涂层。因为非金属材料固有地抗高温能力低，因此现有的涂层的抗高温能力也受限制，而本申请的硬质合金涂层却克服了这方面的缺点。另外，硬质合金涂层的抗沖击、耐磨损等性能也大大强于非金属涂层，因而具有硬质合金涂层的电热面的家电产品在使用时不需要配备特定的辅助工具 (如锅铲）。此外，常好；且涂层与电热面本体同属金属材料，热膨胀系数较为相近，即使用冷水洗热器亚，涂层也不容易脱落。从喷涂工艺来说，无论电热面本身的几何形状或电热面所使用的硬质合金材料的性质如何，硬质合金涂层都能均匀地附着在电热面上，而且结合力强。同时，硬质合金在喷涂过程中不会污染环境。 Service life up to 1 year 20 years 20 years ^a : Abrasion resistance test: Press 3M® scouring pad numbered 7496 with 1 kg pressure, push and pull 50 mm back and forth, observe whether the coating shows the color of the underlying metal. As shown in Fig. 1, the cemented carbide coating used for the electric heating surface of the household electrical appliance of the present application has a great advantage compared with the coating used for the electric heating surface of the household electrical appliance of the prior art. In terms of materials, the cemented carbide coating of the present application belongs to a metal coating, and the prior art coating is a non-metallic coating or a non-metal to metal mixed coating. Because non-metallic materials are inherently resistant to high temperatures, the high temperature resistance of existing coatings is also limited, and the cemented carbide coatings of the present application overcome this disadvantage. In addition, the impact resistance and wear resistance of cemented carbide coatings are also much stronger than non-metallic coatings. Therefore, household appliances with hard-coated electric surfaces do not need to be equipped with specific auxiliary tools. Such as spatula). In addition, it is often good; and the coating is the same as the metal surface of the heating surface body, and the thermal expansion coefficient is similar, that is, the coating is not easy to fall off by using the cold water heater. From the spraying process, the cemented carbide coating can uniformly adhere to the electric heating surface regardless of the geometry of the electric heating surface itself or the nature of the cemented carbide material used for the electric heating surface, and the bonding force is strong. At the same time, the cemented carbide does not pollute the environment during the spraying process.

本领域技术人员应当理解，本申请的实施例仅是为更好地理解本申请而对本申请做出的非限定性说明。本领域技术人员在没有偏离本申请的精神和范围内可以对本申请做出各种修改、替换和变更，这些修改、替换和变更仍落在本申请的保护范围内。 Those skilled in the art should understand that the embodiments of the present application are merely non-limiting descriptions of the present application for better understanding of the present application. Those skilled in the art are not deviating from this Various modifications, changes and variations of the present invention are possible in the spirit and scope of the application, and such modifications, substitutions and alterations are still within the scope of the application.

Claims

权利要求书 Claim

1. 喷涂有硬质合金的加热面。 1. Sprayed with a heated surface of cemented carbide.

2. 如权利要求 1所述的加热面，其中所述硬质合金选自碳化铬基、碳化钨基或碳化钨-碳化铬基硬质合金。 2. The heating surface according to claim 1, wherein the cemented carbide is selected from the group consisting of chromium carbide based, tungsten carbide based or tungsten carbide-chromium carbide based cemented carbide.

3. 如权利要求 2所述的加热面，其中所述碳化铬基硬质合金选自碳化铬基镍铬硬质合金（NiCr-Cr₃C₂)或碳化铬基钴铬合金 (CoCr-Cr₃C₂)。 3. The heating surface according to claim 2, wherein the chromium carbide-based cemented carbide is selected from the group consisting of chromium carbide-based nickel-chromium hard alloy (NiCr-Cr ₃ C ₂ ) or chromium carbide-based cobalt-chromium alloy (CoCr-Cr) ₃ C ₂ ).

4. 如权利要求 2所述的加热面，其中所述碳化钨基硬质合金选自碳化钨基镍硬质合金 (Ni-WC)或碳化钨基钴合金 (Co-WC)。 The heating surface according to claim 2, wherein the tungsten carbide-based cemented carbide is selected from the group consisting of tungsten carbide-based nickel hard alloy (Ni-WC) or tungsten carbide-based cobalt alloy (Co-WC).

5. 如权利要求 2 所述的加热面，其中所述碳化钨-碳化铬基硬质合金选自碳化钨-碳化铬 -镍硬质合金 (Ni-WC-Cr₃C₂)或碳化钨 -碳化铬- 钴合金 (Co-WC-Cr₃C₂)。 5. The heating surface according to claim 2, wherein said tungsten carbide - chromium carbide based cemented carbide is selected from tungsten - carbide chromium - nickel carbide _{(Ni-WC-Cr 3 C} 2) or tungsten carbide - Chromium carbide-cobalt alloy (Co-WC-Cr ₃ C ₂ ).

6. 如权利要求 1-5中任一权利要求所述的加热面，其中喷涂在所述加热面上的硬质合金的厚度为约 0.005 mm至约 0.25 mm。 The heating surface according to any one of claims 1 to 5, wherein the thickness of the cemented carbide sprayed on the heating surface is from about 0.005 mm to about 0.25 mm.

7. 如权利要求 1-6中任一权利要求所述的加热面，其中所述加热面为电热面。 The heating surface according to any one of claims 1 to 6, wherein the heating surface is an electric heating surface.

8. 制备涂覆有硬质合金的加热面的方法，所述方法包括如下步骤： 8. A method of preparing a heated surface coated with a cemented carbide, the method comprising the steps of:

使用热喷涂法将硬质合金材料喷涂于待加工的加热面，得到硬质合金涂层。 The cemented carbide material is sprayed onto the heating surface to be processed by thermal spraying to obtain a cemented carbide coating.

9. 如权利要求 8所述的方法，其中所述硬质合金选自碳化铬基、碳化钨基或碳化钨-碳化铬基硬质合金。 9. The method of claim 8, wherein the cemented carbide is selected from the group consisting of chromium carbide based, tungsten carbide based or tungsten carbide-chromium carbide based cemented carbide.

10. 如权利要求 9所述的方法，其中所述碳化铬基硬质合金选自碳化铬基镍铬硬质合金（NiCr-Cr₃C₂)或碳化铬基钴铬合金 (CoCr-Cr₃C₂)。 10. The method according to claim 9, wherein the chromium carbide-based cemented carbide is selected from chromium carbide-based nickel-chromium hard alloy (NiCr-Cr ₃ C ₂ ) or chromium carbide-based cobalt-chromium alloy (CoCr-Cr _{3 )} C ₂ ).

11. 如权利要求 9所述的方法，其中所述碳化钨基硬质合金选自碳化钨基镍硬质合金 (Ni-WC)或碳化钨基钴合金 (Co-WC)。 The method according to claim 9, wherein the tungsten carbide-based cemented carbide is selected from the group consisting of tungsten carbide-based nickel hard alloy (Ni-WC) or tungsten carbide-based cobalt alloy (Co-WC).

12. 如权利要求 9所述的方法，其中所述碳化钨-碳化铬基硬质合金选自碳化钨-碳化铬 -镍硬质合金 (Ni-WC-Cr₃C₂)或碳化钨 -碳化铬-钴合金 (Co-WC-Cr₃C₂)。 12. The method according to claim 9, wherein said tungsten carbide - chromium carbide based cemented carbide is selected from tungsten - carbide chromium - nickel carbide _{(Ni-WC-Cr 3 C} 2) or a tungsten - carbide Chromium-cobalt alloy (Co-WC-Cr ₃ C ₂ ).

13. 如权利要求 8-12中任一权利要求所述的方法，其中包括在所述加热面上喷涂多个硬质合金涂层，每一涂层中的硬质合金相同或不同。 13. A method according to any of claims 8-12, comprising spraying a plurality of cemented carbide coatings on the heating surface, the cemented carbide in each coating being the same or different.

14. 如权利要求 8-13中任一权利要求所述的方法，其中还包括将得到的硬质合金涂层进行抛光或磨削加工处理的步骤。 14. A method according to any of claims 8-13, further comprising the step of subjecting the resulting cemented carbide coating to a polishing or grinding process.

15. 如权利要求 14所述的方法，其中经过抛光或磨削加工后的硬质合金涂层的厚度为约 0.005 mm至约 0.25 mm。 15. The method of claim 14, wherein the cemented carbide coating after polishing or grinding has a thickness of from about 0.005 mm to about 0.25 mm.

16. 如权利要求 8至 15中任一权利要求所述的方法，其中所述粗化清洁处理步骤所用的方法是吹砂。 16. A method according to any one of claims 8 to 15, wherein the method used in the roughing cleaning process step is sandblasting.

17. 如权利要求 16所述的方法，其中所述吹砂包括用粒度合适的氧化铝砂、白刚玉、棕刚玉或石英砂砂粒在高气压作用下撞击待加工的家电产品电热面，使所述其表面毛化。 17. The method according to claim 16, wherein the sand blowing comprises impinging on the electric heating surface of the household electrical appliance to be processed under high pressure by using alumina sand, white corundum, brown corundum or quartz sand grit of a suitable particle size. The surface is textured.

18. 如权利要求 8至 17中任一权利要求所述的方法，其中所述热喷涂法包括高速或超音速等离子喷涂、高速或超音速火焰喷涂、高速或超音速电弧喷涂及***喷涂。 The method according to any one of claims 8 to 17, wherein the thermal spraying method comprises high speed or supersonic plasma spraying, high speed or supersonic flame spraying, high speed or supersonic arc spraying, and explosive spraying.

19. 如权利要求 8至 18中任一权利要求所述的方法，其中喷涂时硬质合金材料熔射于待加工的加热面的粒子速度不小于 150米 /秒。 The method according to any one of claims 8 to 18, wherein the particle velocity of the cemented carbide material sprayed on the heating surface to be processed during spraying is not less than 150 m / sec.

20. 如权利要求 8至 19中任一权利要求所述的方法，其中所述加热面为电热面。 The method according to any one of claims 8 to 19, wherein the heating surface is an electric heating surface.

21. 通过权利要求 8-20中任一权利要求所述的方法所得到的加热面。 21. A heating surface obtained by the method of any of claims 8-20.

22. 如权利要求 21所述的加热面，其中所述加热面为电热面。 22. The heating surface of claim 21, wherein the heating surface is an electric heating surface.

23. 包含权利要求 21或 22所述的加热面的工业及家用产品。 23. Industrial and household products comprising the heating surface of claim 21 or 22.

24. 如权利要求 23所述的产品，其中所述加热面为电热面。 24. The article of claim 23, wherein the heating surface is an electric heating surface.

25. 如权利要求 23或 24所述的产品，其中所述产品为家电产品。 25. The product of claim 23 or 24, wherein the product is a home appliance.

26. 硬质合金在加热面中的用途，所述用途包括将硬质合金喷涂在力 p热面上。 26. Use of a cemented carbide in a heated surface, the use comprising spraying a cemented carbide on a force p hot surface.

27. 如权利要求 26所述的用途，其中所述硬质合金选自碳化铬基、碳化钨基或碳化钨-碳化铬基硬质合金。 27. The use of claim 26, wherein the cemented carbide is selected from the group consisting of chromium carbide based, tungsten carbide based or tungsten carbide-chromium carbide based cemented carbide.

28. 如权利要求 27所述的用途，其中所述碳化铬基硬质合金选自碳化铬基镍铬硬质合金（NiCr-Cr₃C₂)或碳化铬基钴铬合金 (CoCr-Cr₃C₂)< The use according to claim 27, wherein the chromium carbide-based cemented carbide is selected from chromium carbide-based nickel-chromium hard alloy (NiCr-Cr ₃ C ₂ ) or chromium carbide-based cobalt-chromium alloy. (CoCr-Cr ₃ C ₂ )<

29. 如权利要求 27所述的用途，其中所述碳化钨基硬质合金选自碳化钨基镍硬质合金 (Ni-WC)或碳化钨基钴合金 (Co-WC)。 The use according to claim 27, wherein the tungsten carbide-based cemented carbide is selected from the group consisting of tungsten carbide-based nickel hard alloy (Ni-WC) or tungsten carbide-based cobalt alloy (Co-WC).

30. 如权利要求 27 所述的用途，其中所述碳化钨-碳化铬基硬质合金选自碳化钨-碳化铬 -镍硬质合金 (Ni-WC-Cr₃C₂)或碳化钨 -碳化铬- 钴合金 (Co-WC-Cr₃C₂)。 30. The use according to claim 27, wherein said tungsten carbide - chromium carbide based cemented carbide is selected from tungsten - carbide chromium - nickel carbide _{(Ni-WC-Cr 3 C} 2) or a tungsten - carbide Chromium-cobalt alloy (Co-WC-Cr ₃ C ₂ ).

31. 如权利要求 26-30 中任一权利要求所述的用途，其中所述加热面为电热面。 31. Use according to any of claims 26-30, wherein the heating surface is an electric heating surface.