CN102732823A - Liquid nitridation process of 2108 ductile cast iron crankshafts - Google Patents
Liquid nitridation process of 2108 ductile cast iron crankshafts Download PDFInfo
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- CN102732823A CN102732823A CN2012102573969A CN201210257396A CN102732823A CN 102732823 A CN102732823 A CN 102732823A CN 2012102573969 A CN2012102573969 A CN 2012102573969A CN 201210257396 A CN201210257396 A CN 201210257396A CN 102732823 A CN102732823 A CN 102732823A
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- electric furnace
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Abstract
The invention relates to a liquid nitridation process of 2108 ductile cast iron crankshafts. The liquid nitridation process comprises the following steps that: (1) a 120w well-type electric furnace is adopted; (2) industrial subsalt and mediating salt are put into the well-type electric furnace; (3) the well-type electric furnace is heated from the room temperature to 580 DEG C, compressed air is introduced and aging is performed for 1 hour; (4) 60 2108 ductile cast iron crankshafts are put in the well-type electric furnace of the step (3); (5) the 2108 ductile cast iron crankshafts of the step (4) are kept in the electric furnace for 2-3 hours at the temperature of 520-540 DEG C and the nitridation layer depth achieves 12-18 decimillimetre; and (6) the 2108 ductile cast iron crankshafts are taken out of the furnace and cleaned in a clean water basin. A gas nitriding furnace costs ** and a liquid nitriding furnace costs **, thus the investment of equipment adopted in the process is less; the depth can achieve 8-10 decimillimetre after 10 hours by gas nitridation, while the depth of the nitridation layer can achieve 12-18 decimillimetre after heat preservation for 2-3 hours in the liquid nitriding furnace. The process provided by the invention is simple in operation and is stable. The basic cost of nitridation of each crankshaft is ** and ** less than the cost of nitridation of each crankshaft by gas nitridation.
Description
Technical field
The invention belongs to spherulitic iron crankshaft thermal treatment field, be specifically related to a kind of 2108 spherulitic iron crankshaft wet nitriding technologies.
Background technology
At present, 2108 spherulitic iron crankshafts adopt the thermal treatment process of gas soft nitriding, though can reach technical requirements, there is following shortcoming: and equipment is more expensive, needs more than 20 ten thousand like 120 watts of gas nitriding furnace; Adopting nitrogen to splash into need have the special messenger to keep watch on, in case gas leakage, product has just been scrapped; Produce one 2108 bent axle and need consume 7.4 yuan every of the electricity charge, 6.6 yuan every of nitrogen, every of basic pay reaches 14 yuan, from quality, can only satisfy the lower limit of the technical requirements of 8 ~ 10 of nitride layers, can not satisfy technical requirements greater than 10.
Summary of the invention
Technical problem to be solved by this invention provides a kind of 2108 spherulitic iron crankshaft wet nitriding technologies, and this technology has been simplified the thermal treatment process step of gas soft nitriding greatly, reduces cost, and raises the efficiency, and can also satisfy technical requirements.
Technical scheme of the present invention: a kind of 2108 spherulitic iron crankshaft wet nitriding technologies, its process step is following:
1. select 120 watts one of well-type electric furnace for use;
2. basic salt of industry and conciliation salt are put into the well-type electric furnace of selecting for use;
3. heat up: step well-type electric furnace 2. is heated to 580 ° by room temperature, feeds pressurized air, ageing 1 hour;
4. 60 2108 spherulitic iron crankshafts are put into step well-type electric furnace 3.;
5. with step 2108 spherulitic iron crankshafts 4. 520 ° ~ 540 ° temperature held 2 ~ 3 hours, nitride layer depth reaches 12 ~ 18;
6. come out of the stove and put into clean water basin and clean and to get final product.
The present invention compared with prior art has following beneficial effect: the less equipment investment that the present invention adopts, one more than 20 ten thousand yuan of gas nitriding furnaces, 100,000 yuan in wet nitriding stove; From quality, gas nitriding reached 8 ~ 10 depth dimensionses in 10 hours, and was incubated 2 ~ 3 hours in the wet nitriding stove, and nitride layer depth can reach 12 ~ 18; Technological operation of the present invention is simple, process stabilizing, and every bent axle nitrogenize basic cost is 8.74 yuan, practices thrift 5.5 yuan than every of gas nitriding.
Embodiment
Embodiment 1
A kind of 2108 spherulitic iron crankshaft wet nitriding technologies, its process step is following:
1. select 120 watts one of well-type electric furnace for use;
2. basic salt of industry and conciliation salt are put into the well-type electric furnace of selecting for use;
3. heat up: step well-type electric furnace 2. is heated to 580 ° by room temperature, feeds pressurized air, ageing 1 hour;
4. 60 2108 spherulitic iron crankshafts are put into step well-type electric furnace 3.;
5. with step 2108 spherulitic iron crankshafts 4. 520 ° temperature held 2 ~ 3 hours, nitride layer depth reaches 12 ~ 18;
6. come out of the stove and put into clean water basin and clean and to get final product.
Embodiment 2
A kind of 2108 spherulitic iron crankshaft wet nitriding technologies, its process step is following:
1. select 120 watts one of well-type electric furnace for use;
2. basic salt of industry and conciliation salt are put into the well-type electric furnace of selecting for use;
3. heat up: step well-type electric furnace 2. is heated to 580 ° by room temperature, feeds pressurized air, ageing 1 hour;
4. 60 2108 spherulitic iron crankshafts are put into step well-type electric furnace 3.;
5. with step 2108 spherulitic iron crankshafts 4. 530 ° temperature held 2 ~ 3 hours, nitride layer depth reaches 12 ~ 18;
6. come out of the stove and put into clean water basin and clean and to get final product.
Embodiment 3
A kind of 2108 spherulitic iron crankshaft wet nitriding technologies, its process step is following:
1. select 120 watts one of well-type electric furnace for use;
2. basic salt of industry and conciliation salt are put into the well-type electric furnace of selecting for use;
3. heat up: step well-type electric furnace 2. is heated to 580 ° by room temperature, feeds pressurized air, ageing 1 hour;
4. 60 2108 spherulitic iron crankshafts are put into step well-type electric furnace 3.;
5. with step 2108 spherulitic iron crankshafts 4. 540 ° temperature held 2 ~ 3 hours, nitride layer depth reaches 12 ~ 18;
6. come out of the stove and put into clean water basin and clean and to get final product.
Claims (1)
1. spherulitic iron crankshaft wet nitriding technology is characterized in that its process step is following:
1. select 120 watts one of well-type electric furnace for use;
2. basic salt of industry and conciliation salt are put into the well-type electric furnace of selecting for use;
3. heat up: step well-type electric furnace 2. is heated to 580 ° by room temperature, feeds pressurized air, ageing 1 hour;
4. 60 2108 spherulitic iron crankshafts are put into step well-type electric furnace 3.;
5. with step 2108 spherulitic iron crankshafts 4. 520 ° ~ 540 ° temperature held 2 ~ 3 hours, nitride layer depth reaches 12 ~ 18;
6. come out of the stove and put into clean water basin and clean and to get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102573969A CN102732823A (en) | 2012-07-25 | 2012-07-25 | Liquid nitridation process of 2108 ductile cast iron crankshafts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102573969A CN102732823A (en) | 2012-07-25 | 2012-07-25 | Liquid nitridation process of 2108 ductile cast iron crankshafts |
Publications (1)
| Publication Number | Publication Date |
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| CN102732823A true CN102732823A (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102573969A Pending CN102732823A (en) | 2012-07-25 | 2012-07-25 | Liquid nitridation process of 2108 ductile cast iron crankshafts |
Country Status (1)
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| CN (1) | CN102732823A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609435A (en) * | 2009-03-24 | 2009-12-23 | 成都市华为赛门铁克科技有限公司 | A kind of method of power failure of equipment, electronic equipment and network system |
| CN201609435U (en) * | 2009-12-21 | 2010-10-20 | 董翠锋 | Suspension device for fracture |
-
2012
- 2012-07-25 CN CN2012102573969A patent/CN102732823A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609435A (en) * | 2009-03-24 | 2009-12-23 | 成都市华为赛门铁克科技有限公司 | A kind of method of power failure of equipment, electronic equipment and network system |
| CN201609435U (en) * | 2009-12-21 | 2010-10-20 | 董翠锋 | Suspension device for fracture |
Non-Patent Citations (5)
| Title |
|---|
| 付长明等: "QPQ盐浴复合处理技术对3Cr2W8V钢组织和性能的影响", 《材料科学与工艺》 * |
| 刘徽平: "新型无污染盐浴软氮化工艺的研究与应用", 《南方冶金学院学报》 * |
| 徐洪波: "重卡曲轴热处理工艺性能分析", 《中国优秀硕士论文全文数据库（电子期刊）》 * |
| 李邓希: "模具盐浴氮化工艺的选择", 《冶金丛刊》 * |
| 浙江大学机械系热处理专业: "《化学热处理》", 31 December 1974 * |
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Application publication date: 20121017 |