Hot stamping die steel material and manufacturing method thereof
A hot stamping die and manufacturing method technology, applied in the field of alloy steel materials and their manufacturing, can solve the problems of poor thermal fatigue resistance and thermal conductivity, poor wear resistance and thermal conductivity, etc., and achieve high tempering stability and excellent thermal conductivity. The effect of impact toughness
Inactive Publication Date: 2021-09-17
青岛洲际钢铁有限公司
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Problems solved by technology
Although DIEVAR has good thermal fatigue performance and toughness, its wear resistance and thermal conductivity are still not good; CR7V has good wear resistance, but poor thermal fatigue and thermal conductivity
Method used
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[0017] The present invention will be further described below in conjunction with the examples.
[0018] The hot stamping die steel material provided by the present invention is mainly composed of the following elements, calculated by mass percentage: C0.47-0.51%; Si 0.25-0.30%; Mn 0.25-0.30%; Cr 4.20-4.50%; Mo 2.90-3.10 %; V 0.50-0.60%; Al 0.01-0.03%; balance Fe and other inevitable impurities.
[0019] The invention relates to a long-life hot stamping die steel material. In terms of composition design, the content of chromium, manganese and silicon elements is reduced, and the content of carbon, molybdenum and vanadium is appropriately increased. According to the characteristics of high thermal conductivity and high wear resistance required by hot stamping, the composition and content of each element are scientifically designed by analyzing the influence of each alloy element on the material properties.
[0020] Carbon is a necessary element to ensure the hardness of the mat...
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The invention discloses a hot stamping die steel material and a manufacturing method thereof. The hot stamping die steel material comprises the following chemical components, by mass, 0.47-0.51% of C; 0.25% to 0.30% of Si; 0.25 to 0.30% of Mn; 4.20 to 4.50% of Cr; 2.90 to 3.10% of Mo; 0.50 to 0.60% of V; 0.01 to 0.03% of Al; and the balance Fe and inevitable impurities. The manufacturing method comprises the following steps that an electroslag ingot with uniform components is smelted through electric furnace smelting, vacuum refining and electroslag remelting, and stress relief annealing on the electroslag ingot is conducted; then forging forming is conducted, and spheroidizing annealing is conducted after forging; and finally, high-temperature quenching and three-time high-temperature tempering are adopted, and the hot stamping die steel material with excellent impact toughness, tempering stability and high quenching hardness is obtained.
Description
technical field [0001] The invention relates to an alloy steel material and a manufacturing method thereof, in particular to a hot stamping die steel material and a manufacturing method thereof. Background technique [0002] With the increasing energy crisis and environmental problems, vehicle lightweighting has become an inevitable path for the sustainable development of the world's auto industry. The high reinforcement of the body can not only reduce the weight of the body, but also improve the safety. It is the best way to realize the lightweight of the body and improve the crash safety at the same time. [0003] In order to meet the development needs of high-strength vehicle body, advanced high-strength steel and advanced parts forming technology came into being. When the strength of high-strength steel reaches 1000MPa or more, if the traditional cold stamping process is used to manufacture high-strength parts, it is difficult to avoid technical problems such as poor fo...
Claims
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Login to View More IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C21D1/18C21D1/30C21D6/00C21D8/00C22C33/04
CPCC22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C33/04C21D1/30C21D1/18C21D6/002C21D6/005C21D6/008C21D8/005
Inventor 王海燕孙权鲍晓倩
Owner 青岛洲际钢铁有限公司