What material is used for the pin? Analysis of hot topics and hot content on the entire network in the past 10 days
As a key component of mechanical transmission and connection, pin shaft material selection directly affects performance and service life. Based on the hot topics on the Internet in the past 10 days, we have compiled the core data and industry trends of pin materials to help you quickly grasp the latest technology trends.
1. Performance comparison of mainstream materials for pins in 2024
| Material type | Tensile strength (MPa) | Hardness(HRC) | Corrosion resistance | Typical application scenarios |
|---|---|---|---|---|
| 45# carbon steel | 600-800 | 20-25 | generally | Ordinary mechanical transmission |
| 40Cr alloy steel | 800-1000 | 25-32 | better | car gearbox |
| Stainless steel 304 | 520-750 | excellent | Food machinery | |
| 42CrMo | 28-35 | good | Construction machinery |
2. Recent industry hot spots
1.New energy vehicle pin material upgrade: Tesla’s latest patent shows that it uses a new nickel-based alloy pin with a 40% increase in high-temperature resistance, becoming the most watched technological breakthrough in the past seven days.
2.The rise of 3D printing customized pins: A German company uses SLM technology to produce titanium alloy pins to achieve a complex internal cooling structure. This topic has reached 1.2 million+ views on Zhihu.
3.Progress in research and development of environmentally friendly materials: A team from the Chinese Academy of Sciences developed a biodegradable composite material pin and successfully tried it in the field of agricultural machinery. The reading volume of related papers increased by 300% every week.
3. Key factors in material selection
| Consideration dimensions | Preferred materials | cost factor |
|---|---|---|
| high load | 42CrMo/20MnTiB | 1.8-2.5 |
| Corrosion resistant | 316 stainless steel/titanium alloy | 3.0-8.0 |
| Lightweight | 7075 aluminum alloy/TC4 titanium alloy | 4.5-12.0 |
| Economical | 45# steel/Q235 | 1.0 |
4. Expert advice
1.Overload situation: Priority is given to 42CrMo after quenching and tempering treatment, and the surface hardness is recommended to be controlled in the HRC28-32 range.
2.corrosive environment: Duplex stainless steel 2205 can be used, and its cost performance is better than traditional 316L stainless steel.
3.Precision transmission: It is recommended to use 20CrMnTi carburized steel, which has good core toughness and wear-resistant surface.
4.dynamic load: The latest research shows that the fatigue life of SCM435 chromium-molybdenum steel is 35% longer than that of traditional materials.
5. Forecast of future trends
According to the data analysis of the entire network, nano-coated pins, intelligent sensing materials, and self-lubricating composite materials will become the key development directions in the next three years. The graphene-reinforced pin test data recently released by a head bearing company shows that its wear rate is reduced to 1/5 of that of traditional materials. Related video views on this topic on Station B have increased by more than 500,000 times per week.
Note: The statistical period of the data in this article is from June
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