It's no joke that a kitchen knife can't pat garlic. According to reports, Ms. Wang, a resident of Guangzhou, patted garlic with a newly bought Zhang Xiaoquan kitchen knife, and the kitchen knife broke into two pieces. Later, although the customer service agreed to exchange the goods, she also said that "it is not recommended to pat garlic".

According to 《GB/T40356-2021 Kitchen Knives》, the hardness of the stainless steel blade should not be less than 50HRC. EngineerWu introduced that for the case where the overall hardness of the tool is higher than 50HRC, the higher the hardness, the lower the relative toughness, and the more "brittle" it can be. The toughness mentioned here mainly refers to the impact resistance of the material. If the instantaneous impact load exceeds the impact resistance range of the material, the risk of material fracture is greatly increased."

Engineer Wu explained that the knives mentioned in the news have a "flaky" shape structure. When using the knives for vertical cutting, the load acts on the knife edge vertically, and the stress transmitted from the knife edge can be more evenly distributed throughout the entire area. on the knife. However, when the tool is used for horizontal shooting/collision, the force point is concentrated on a certain point or a certain area of the blade body. At this time, in the vertical direction where the impact load is applied, there is a lack of material support, which may be coupled with the high hardness and low toughness of the blade, which is easy to break. Comparatively speaking, the impact resistance of the horizontal blade is lower than that of the vertical blade. Of course, the strength of the actual use also needs to be considered.