{"id":10725,"date":"2026-10-14T07:25:09","date_gmt":"2026-10-14T07:25:09","guid":{"rendered":"https:\/\/ychltools.com\/resources\/stainless-steel-turning-inserts\/"},"modified":"2026-10-21T15:02:03","modified_gmt":"2026-10-21T15:02:03","slug":"stainless-steel-turning-inserts","status":"publish","type":"page","link":"https:\/\/ychltools.com\/zh\/resources\/stainless-steel-turning-inserts\/","title":{"rendered":"\u8f66\u524a\u5200\u7247 for \u4e0d\u9508\u94a2 (ISO M)"},"content":{"rendered":"

Stainless is difficult for three specific reasons: it work-hardens<\/strong>, it has poor thermal conductivity<\/strong> (heat goes into the tool, not the chip), and austenitic grades are gummy<\/strong> at low speed. Everything below follows from those three facts.<\/p>\n

Real cutting data for ISO M<\/h2>\n

Aggregated from the published data of every stainless-capable insert we stock \u2014 1695 insert records:<\/p>\n

\n\n\n\n\n\n\n\n
Parameter<\/th>\nFull published range<\/th>\nTypical (median)<\/th>\n<\/tr>\n<\/thead>\n
Cutting speed vc<\/td>\n60 \u2013 250 m\/min<\/td>\n85 \u2013 200 m\/min<\/strong><\/td>\n<\/tr>\n
Feed fn<\/td>\n0.01 \u2013 1.20 mm\/rev<\/td>\n0.10 \u2013 0.30 mm\/rev<\/strong><\/td>\n<\/tr>\n
Depth of cut ap<\/td>\n0.05 \u2013 10.30 mm<\/td>\n0.5 \u2013 3.1 mm<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Duplex (2205) and super-duplex sit at the lower half of that speed range. Martensitic stainless (410, 420) machines more like a P-group steel and can run faster.<\/p>\n

\u724c\u53f7s that work<\/h2>\n

Our most-stocked stainless grades: AP200U, AC200M, AC100M, AP200M, AP301M, AP251U, AP403M, AP351U, AP100S, AP100U<\/strong>.<\/p>\n

These are mostly PVD-coated or fine-grain substrates, because stainless needs a sharp, tough<\/em> edge rather than a thick thermal-barrier coating. Using a heavy CVD steel grade on 304 is the classic mistake \u2014 the coating is too thick, the edge is rounded, and it rubs instead of cutting.<\/p>\n

The four rules<\/h2>\n

1. Never cut in the work-hardened layer<\/h3>\n

Every pass leaves a hardened skin. If the next pass is shallower than that skin, you are machining hardened material and wear accelerates dramatically. Keep ap above roughly 0.2 mm<\/strong> at all times, and vary ap between roughing passes so the notch does not form at the same line.<\/p>\n

2. Keep the tool moving \u2014 never dwell<\/h3>\n

A stationary or feeding-slowly tool work-hardens the surface instantly. Avoid pausing in the cut, avoid finishing with zero feed (spring passes), and programme lead-in and lead-out arcs.<\/p>\n

3. Use positive geometry and a sharp edge<\/h3>\n

For boring and finishing thin-walled stainless parts, positive \u5200\u7247 (CCMT, DCMT, VBMT) cut with far less force and much less chatter. Reserve negative \u5200\u7247 for roughing on rigid setups.<\/p>\n

4. Run at a decent speed<\/h3>\n

Counter-intuitively, going slower<\/em> makes it worse: below roughly 60 m\/min austenitic stainless forms a built-up edge, which then tears away pieces of the cutting edge. If you see BUE, raise vc rather than lowering it.<\/p>\n

\u65ad\u5c51\u69fd<\/h2>\n

Stainless chips are tough and stringy, so you need an aggressive, sharp breaker aimed at low-to-medium feed. The geometries most often specified for M in our catalogue: PC2, MM4, MC3, PB1, MC4, KC2<\/strong>. If chips come off as long ribbons, you are below the breaker’s feed window \u2014 raise feed or move to a lighter geometry.<\/p>\n

Coolant<\/h2>\n

Use it, and use plenty. Stainless generates heat at the edge and the workpiece holds it. Emulsion at 6\u201310% delivered at high pressure to the rake face gives noticeably better tool life than dry. High-pressure coolant also helps break the chips, which matters more in stainless than in any other group.<\/p>\n

Troubleshooting<\/h2>\n
\n\n\n\n\n\n\n\n\n
Symptom<\/th>\nCause<\/th>\nFix<\/th>\n<\/tr>\n<\/thead>\n
Notch wear at depth-of-cut line<\/td>\nWork-hardened layer<\/td>\nVary ap between passes; tougher PVD grade<\/td>\n<\/tr>\n
Built-up edge, torn surface<\/td>\nSpeed too low<\/td>\nRaise vc above 80 m\/min; sharper polished grade<\/td>\n<\/tr>\n
Long stringy chips<\/td>\nFeed below breaker window<\/td>\nRaise fn; lighter chipbreaker<\/td>\n<\/tr>\n
Poor finish, chatter<\/td>\nForce too high \/ weak setup<\/td>\nPositive geometry, smaller nose radius, lower ap<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Where to start<\/h2>\n