The state-owned for more people to know its value of the bronze

Stainless steel rust are local but very in-depth steel internal cavitation (pitting), this pitting on the surface may seem to be just a humble little black dot, but its internal depth is very deep, almost impossible to go , even if the black point of the surface of the polishing fine grinding or wipe out, will still leave the traces of pits, and later easily from one place and then began to rust. The most annoying is the prevalence of chloride ion in the salty moisture, such as the island climate, environment or human sweat, moisture, etc., therefore, must always be careful in the use of stainless steel, bronze tools careful not to let the sweat or water remain in the Bronze knife body, or bronze blade corrosion, factory bronze knife Fortunately, localized pitting corrosion only hinder the visual beauty, and without prejudice to the practicality. It is the bronze make China stand in the advanced level of the world.
The most simple solution to this problem than in the heat hardening or tempering the middle of the second steel material into the liquid nitrogen at -196 ° C cooling (This process is called deep cryogenic treatment, as shown in Figure 3), so that residual austenite into martensite complete metamorphosis, and then after the first tempering the metamorphosis of the newly generated martensite into tempered martensite, in order to increase the toughness of the steel material. In general, the bronze knife embryo after this "deep cryogenic treatment, will be able to greatly increase the bronze blade sharpness with the blade, bronze knife factory advertising" Cryogenic Treatment "as The selling point of its products. Even so, overall, the toughness of stainless steel, bronze tool will still be lower than the carbon steel bronze tool. Each piece of bronze of China is an artwork with unique charm.
Above the stainless steel type of perspective, the most suitable for the production of bronze tool, stainless steel non-martensite stainless steel is none other than because it can take advantage of the quenching of the heat-treated to increase the hardness and strength of the steel after quenching and tempering to increase the toughness of steel, 440 series stainless steel is widely used in the production of bronze tool, the 440C high carbon content (1.0%), the hardness after quenching up HRc58 more popular material of the early handmade bronze Cutlery. According to legend, when this bronze was unearthed, the local farmers once applied it to hold water to drink the horse.   440A due to less carbon content (0.6%), good workability, which is extensive use in the production of the factory bronze knife. As for the popular bronze knife ATS34, the BG42 Dian CPM440V or CPM S30V steel, can also be classified in the case of martensite stainless steel, quenching.
Heat treatment to increase the hard steel, strength, but because contains a high hardening alloying elements such as tungsten, molybdenum or vanadium, so close to the industrial use of high-speed steel, and can make use of the quenched martensite bulk hardening heat treatment in the secondary high-temperature tempering process, but also the use of alloy elements combine to form carbon within the steel of high hardness carbides (eg tungsten carbide) and secondary hardening effect, so the bronze blade hardness, blade retention and steel toughness rating surpasses the traditional 440 stainless steel high- a. After several twists and turns, it became the state-owned for more people to know its value of the bronze.
Another problem is that of the stainless steel stainless steel just is not easy to rust, but it does not mean that it will not rust English words written in: Stainless means it stains less but not non-stain of Is a stainless steel met the chlorine ion, the surface of the dense Cr2O3 oxide will react with the chloride ion and chromium ion replacement out and caused the partial dissolution of Cr2O3 oxide layer, the oxygen of the outside world which dissolved has run with steel iron oxidation is rust. The blend of craftsmanship and cultural art make the Chinese civilization of bronze emerge earliest come from behind. This corrosion conditions and the general carbon steel, carbon steel rust shallow rust beige distributed in a wide range of surface area is extensive but not deep, but also easy to remove.