Depth interpretation of foreign high fever and strong overview of the development of mould steel

As the temperature of hot die work to continuously improve the working conditions were harsh, strong heat of the traditional hot work die steel H21 (3Cr2W8V) steel can not meet the requirements of foreign gradually developed a number of new hot work tool steel, steel, its representation No. There are four types.
Strength of the alloy heat ⒈ hot work die steel:
Generally in the 4Cr3Mo3SiV(H10) and 4CrMoSiV1(H13) steel based on the increase W, Mo, Co, Nb and other alloying elements to improve its high temperature performance. Such as the United States, H10A (3Cr3Mo3Co3V) steel, Sweden QR080 (3Cr3Mo2VMn), QRO90, HOTVAR, DIEVAR Steel, Japan's Daido Steel DH31-SUPER, DH31-EX Steel, Japan's Hitachi metals DAC55 steel, German Groditz of 1.2367 steel, steel and 3Cr2W8V steels such higher-temperature strength and resistance to temper softening, in production with favorable results.
⒉ precipitation hardening hot work tool steel:
Precipitation hardening hot work die steel low carbon content, usually in 2% (wt) or so, the other containing the ingot, vanadium, molybdenum, aluminum and some precipitation hardening alloy elements, die quenching and tempering, the Organization for the strip like martensite, with good toughness and machinability, the cavity can be processed. Die in the course, contact with the workpiece with high temperature, the mold surface is heated to a piece of steel precipitation hardening temperature (500 ~ 600 ℃), to the work surface alloy carbides and intermetallic precipitates, the mold surface hardness can be increased to 45 ~ 48HRC, thus improving the wear resistance of the surface of the mold cavity while still maintaining the original heart of the organization department and high toughness, mold life is improved.
Precipitation hardening hot work die steel representation of the Japanese Daido Steel's DH76 (2Cr3Ni3V), Japan's Hitachi Metals Corporation YHD3, YHD26, YHD28.

⒊ austenitic hot work tool steel:
Austenitic hot work tool steel in order to meet the operating temperature of 7000 ~ 800 ℃ heat for the needs of the development die, because, generally hot die steel, when the working temperature exceeds 650 ℃, it will produce the phenomenon of tempered steel thermal strength of the sharp decline. Type of steel after solution and aging treatment, in 700 ~ 800 ℃ can maintain good strength, high temperature parts can be used to make the conditions of the mold. Drawback is that such poor thermal conductivity of steel, thermal expansion coefficient, anti-fatigue properties of hot and cold less, not suitable for work under conditions of acute thermal quench mold, such as using water-cooled mold. These steels are representative of steel, Hitachi Metals Corporation 5Mn18Cr10V2 Steel, Daido Steel Co., Japan's 5Mn15Ni5Cr8Mo2V2 steel.
⒋ substrate steel and low carbon high speed steel:
High-speed steel substrate is to reduce the carbon content of steel, its chemical composition is equivalent to high-speed steel after quenching tissue matrix components, such as quenching of excess carbon steel a small number of small uniform, so the toughness and thermal fatigue performance is improved. Both can be used for hot die materials can also be used in the manufacture of high-performance cold mold material. Representative of the United States vanadium alloy steel company VascoMA (5Cr4W3Mo2V) Steel, Daido Steel Co., Ltd. of Japan DRM1, DRM2, DRM3 Steel, Japan's Hitachi Metals Corporation YXR33 and so on.
Low-carbon high-speed steel high speed steel to improve the toughness and poor fatigue resistance developed, high-speed carbon steel fell 0.3% to 0.6% (mass fraction), in the lower part of the hot hardness and wear resistance in the case to improve its toughness and fatigue properties of hot and cold. Representative of the U.S. steel ASTM standard steel H25 (3Cr4W15V), H26 (5W18CrV), H42 (6W6Mo8Cr4V2) steel. High-speed steel and low carbon steel substrate, as its overall performance is better, both for hot die materials can also be used to produce high-performance cold-working die.

HongChao(DongGuan) Mould & Technology Co.,Ltd. warmth to remind you that the company sells high-quality imported hot-work tool steel include: Swedish Uddeholm hot work die steel ORVAR SUPREME, DIEVAR, QRO90, HOTVAR etc.; Sweden Assab 8402 hot work die steel , 8407,8418, etc.; Japan Datong hot die steel DHA1, DHA-WORLD, DH31-S, DH31-EX, DHA-Thermo, DRM1 etc.; Japan's Hitachi hot die steel DAC, DAC55, YXR3, YXR33 etc.; German Groditz hot die steel 1.2344,1.2367,1.2365,1.2343 and so on.

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Source: HongChao(DongGuan) Mould & Technology Co.,Ltd.
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